Calibration of Resistance Factors for Driven Piles Using Static and Dynamic Tests

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ISBN 13 : 9781321400434
Total Pages : 234 pages
Book Rating : 4.4/5 (4 download)

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Book Synopsis Calibration of Resistance Factors for Driven Piles Using Static and Dynamic Tests by : Deshinka Arimena Bostwick

Download or read book Calibration of Resistance Factors for Driven Piles Using Static and Dynamic Tests written by Deshinka Arimena Bostwick and published by . This book was released on 2014 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of geotechnical engineering has evolved from Allowable Stress Design (ASD) to Load Factor and Resistance Design (LRFD) which has led to a need to quantify the measures of uncertainty and the level of reliability associated with a project. The measures of uncertainty are quantified by load and resistance factors, while the level of reliability is driven by the amount of risk an owner is willing to take and is quantified by the reliability index. The load factors are defined through structural design codes, but the resistance factors have uncertainties that can be mitigated through reliability based design. The American Association of State Highway and Transportation Officials (AASHTO) have recommended resistance factors that are dependent on the type of load tests conducted and are available as a reference to state agencies. The objective of this study was to improve the AASHTO recommended resistance factors used by the Arkansas State Highway and Transportation Department (AHTD), thereby, increasing allowable pile capacity and reducing deep foundation costs. Revised resistance factors for field acceptance based on dynamic testing were established through the analysis of pile load test data where both static and dynamic load testing was conducted. Pile load tests were separated by pile type and soil type. It was important that the load test data analyzed represented soil and geologic conditions similar to those found in Arkansas. The resistance factors determined from this analysis improved AHTD current practice, but indicated that the factors recommended by AASHTO may be unconservative for this region.

Calibration of Resistance Factors Needed in the LRFD Design of Driven Piles

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ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Calibration of Resistance Factors Needed in the LRFD Design of Driven Piles by : Murad Yusuf Abu-Farsakh

Download or read book Calibration of Resistance Factors Needed in the LRFD Design of Driven Piles written by Murad Yusuf Abu-Farsakh and published by . This book was released on 2009 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Load and Resistance Factor Design (LRFD) for Deep Foundations

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Publisher : Transportation Research Board
ISBN 13 : 0309087961
Total Pages : 87 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Load and Resistance Factor Design (LRFD) for Deep Foundations by : Samuel G. Paikowsky

Download or read book Load and Resistance Factor Design (LRFD) for Deep Foundations written by Samuel G. Paikowsky and published by Transportation Research Board. This book was released on 2004 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and research approach -- Findings -- Interpretation, appraisal, and applications -- Conclusions and suggested research -- Bibliography -- Appendixes.

Two Driven Pile Load Tests for Use in Missouri LRFD Guidelines

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ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (882 download)

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Book Synopsis Two Driven Pile Load Tests for Use in Missouri LRFD Guidelines by : Matthew Garry Stuckmeyer

Download or read book Two Driven Pile Load Tests for Use in Missouri LRFD Guidelines written by Matthew Garry Stuckmeyer and published by . This book was released on 2014 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A static pile load test program was initiated by the Missouri Department of Transportation (MoDOT) to evaluate the use of pile load tests in Missouri LRFD guidelines. The program's approach involves two phases to achieve the appropriate levels of reliability for driven piles in the state of Missouri. This thesis focuses on the data collection efforts of Phase 1. Two quick static pile load tests were performed to failure on test piles in the Southeast Lowlands geologic region of Missouri. The piles were dynamically monitored during installation and subsequent restrike tests performed. The results of the static and dynamic pile testing were evaluated and interpreted. Overall, the nominal resistances predicted by dynamic tests (CAPWAP) at beginning of restrike (BOR) compared well to the results of the static load tests evaluated using Davisson's method (at these specific sites). A comparison of the load transfer distributions from the dynamic and static load tests provided mixed results. The effects of pile set-up after driving are a significant factor to consider in determining the need for a restrike. The additional resistance available following pile setup can have a substantial effect on the nominal resistance determined using dynamic methods. When BOR capacities are measured using dynamic methods they can be used with confidence for the calibration of resistance factors with respective pile types and geologic units. Available pile load test data sets from Missouri's neighboring states and previous efforts conducted in Missouri were compiled as well. Two recently available pile load test databases were evaluated and considered for the upcoming phase to conduct calibration of resistance factors."--Abstract, page iii.

Static and Wave Equation Analyses and Development of Region-specific Resistance Factors for Driven Piles

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ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (953 download)

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Book Synopsis Static and Wave Equation Analyses and Development of Region-specific Resistance Factors for Driven Piles by : Youssef Bougataya

Download or read book Static and Wave Equation Analyses and Development of Region-specific Resistance Factors for Driven Piles written by Youssef Bougataya and published by . This book was released on 2016 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study uses an existing database of dynamic loading tests of driven piles installed in the Puget Sound Lowlands to improve the reliability of axial performance. First, the unit shaft resistances developed from stress wave signal matching to dynamic records of pile installation are used to develop an effective stress-based shaft resistance model. New, statistically unbiased unit shaft resistance models are proposed for piles driven at End-of-Drive (EOD) and Beginning-of-Restrike (BOR) and for a range of specific soil types and relative densities and consistencies. The accuracy and uncertainty of each model is quantified and compared. Then, the observed unit shaft resistances and proposed design models are used to characterize the magnitude of time-dependent capacity gain. Although these models allow estimation of the range of capacity gain anticipated following pile installation, no reliable time-dependent relationship could be proposed. The study concludes with the quantification of accuracy and uncertainty in dynamic wave equation-based and existing static analysis procedures and calibration of resistance factors for use with load and resistance factor design (LRFD). These resistance factors indicate, in some cases, dramatic improvement in the useable pile capacity at a given reliability owing to the use of a database from a specific region. The results from this work may be immediately applied in practice in the Puget Sound Lowlands.

Load and Resistance Factor Design (LRFD) Pile Driving Project - Phase II Study

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ISBN 13 :
Total Pages : 514 pages
Book Rating : 4.:/5 (883 download)

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Book Synopsis Load and Resistance Factor Design (LRFD) Pile Driving Project - Phase II Study by : Aaron S. Budge

Download or read book Load and Resistance Factor Design (LRFD) Pile Driving Project - Phase II Study written by Aaron S. Budge and published by . This book was released on 2014 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven piles are the most common foundation solution used in bridge construction (Paikowsky et al., 2004). Their safe use requires to reliable verification of their capacity and integrity. Dynamic analyses of driven piles are methods attempting to obtain the static capacity of a pile, utilizing its behavior during driving. Dynamic equations (aka pile driving formulas) are the earliest and simplest forms of dynamic analyses. The development and the examination of such equation tailored for MnDOT demands is presented. In phase I of the study reported by Paikowsky et al. (2009, databases were utilized to investigate previous MnDOT (and other) dynamic formulas and use object oriented programming for linear regression to develop a new formula that was then calibrated for LRFD methodology and evaluated for its performance. This report presents the findings of phase II of the study in which a comprehensive investigation of the Phase I findings were conducted. The studies lead to the development of dynamic formulae suitable for MnDOT foundation practices, its calibrated resistance factors and its application to concrete and timber piles. Phase II of the study also expanded on related issues associated with Wave Equation analyses and static load tests, assisting the MnDOT in establishing requirements and specifications.

Development of Resistance Factors for Axial Capacity of Driven Piles in North Carolina

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (656 download)

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Book Synopsis Development of Resistance Factors for Axial Capacity of Driven Piles in North Carolina by :

Download or read book Development of Resistance Factors for Axial Capacity of Driven Piles in North Carolina written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Resistance factors were developed in the framework of reliability theory for the Load and Resistance Factor Design (LRFD) of driven pile's axial capacity in North Carolina utilizing pile load test data available from the North Carolina Department of Transportation. A total of 140 Pile Driving Analyzer (PDA) data and 35 static load test data were compiled and grouped into different design categories based on four pile types and two geologic regions. Resistance statistics were evaluated for each design category in terms of bias factors. Bayesian updating was employed to improve the statistics of the resistance bias factors, which were derived from a limited number of pile load test data. Load statistics presented in the current AASHTO LRFD Bridge Design Specifications were used in the reliability analysis and the calibration of the resistance factors. Reliability analysis of the current NCDOT practice of pile foundation design was performed to evaluate the level of safety and to select the target reliability indices. Resistance factor calibration was performed for the three methods of static pile capacity analysis commonly used in the NCDOT: the Vesic, the Nordlund, and the Meyerhof methods. Two types of First Order Reliability Methods (Mean Value First Order Second Moment method and Advanced First Order Second Moment method) were employed for the reliability analysis and the calibration of the resistance factors. Recommended resistance factors are presented for the three methods of static pile capacity analysis and for seven different design categories of pile types and geologic regions. The resistance factors developed and recommended from this research are specific for the pile foundation design by the three static capacity analysis methods and for the distinct soil type of the geologic regions of North Carolina. The methodology of the resistance factor calibration developed from this research can be applied to the resistance factor calibration for other foundation.

Reliability-based Design and Acceptance Protocol for Driven Piles

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ISBN 13 : 9781321411171
Total Pages : 492 pages
Book Rating : 4.4/5 (111 download)

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Book Synopsis Reliability-based Design and Acceptance Protocol for Driven Piles by : Joseph Jabo

Download or read book Reliability-based Design and Acceptance Protocol for Driven Piles written by Joseph Jabo and published by . This book was released on 2014 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current use of the Arkansas Standard Specifications for Highway Construction Manuals (2003, 2014) for driven pile foundations faces various limitations which result in designs of questionable reliability. These specifications are based on the Allowable Stress Design method (ASD), cover a wide range of uncertainties, do not take into account pile and soil types, and were developed for general use. To overcome these challenges it is deemed necessary to develop a new design and acceptance protocol for driven piles. This new protocol incorporates locally calibrated RLFD resistance factors for accounting for local design and construction experiences and practices, as well as specific soil conditions and pile types. In that perspective, this dissertation focuses on the design and acceptance of driven pile foundations (predominately for bridge projects) using an LRFD protocol. A great deal of insight is gained into the factors that contribute to the performance of deep foundations by conducting an extensive literature review. The research assembled a relatively large database of pile load tests where both static and dynamic load testing was performed and sufficient soils information existed to perform static design calculations. A MATLAB® based program was developed to use the information contained in the database to compute resistance factors for driven piles using the First Order Second Moment Method (FOSM), Improved FOSM, the First Order Reliability Method (FORM), and Monte Carlo Simulations (MCS). The research also addressed a technique to update resistance factors using Bayesian techniques when new load tests are added to the database. More importantly the dissertation formulated a design and acceptance protocol that seeks to unify the level of reliability for deep foundations through both the design and construction phases. As a verification mechanism to the developed design and acceptance protocol, a full-scale pile load testing program was recommended. The testing program would be composed of ten driven piles that had been dynamically and statically load tested. It was found that, for the same required reliability level, acceptance criteria could be lowered if more piles are tested on a jobsite. Subsequently, a non-contact instrument--such as Pile Driving Monitoring device-is recommended to verify in situ pile capacity of each and every pile on construction site. The results from in situ pile capacity verification could be employed to update the calibrated resistance factors and to refine future designs.

Development of LRFD Design Procedures for Bridge Piles in Iowa

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (794 download)

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Book Synopsis Development of LRFD Design Procedures for Bridge Piles in Iowa by :

Download or read book Development of LRFD Design Procedures for Bridge Piles in Iowa written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: For well over 100 years, the Working Stress Design (WSD) approach has been the traditional basis for geotechnical design with regard to settlements or failure conditions. However, considerable effort has been put forth over the past couple of decades in relation to the adoption of the Load and Resistance Factor Design (LRFD) approach into geotechnical design. With the goal of producing engineered designs with consistent levels of reliability, the Federal Highway Administration (FHWA) issued a policy memorandum on June 28, 2000, requiring all new bridges initiated after October 1, 2007, to be designed according to the LRFD approach. Likewise, regionally calibrated LRFD resistance factors were permitted by the American Association of State Highway and Transportation Officials (AASHTO) to improve the economy of bridge foundation elements. Thus, projects TR-573, TR-583 and TR-584 were undertaken by a research team at Iowa State University's Bridge Engineering Center with the goal of developing resistance factors for pile design using available pile static load test data. To accomplish this goal, the available data were first analyzed for reliability and then placed in a newly designed relational database management system termed PIle LOad Tests (PILOT), to which this first volume of the final report for project TR-573 is dedicated. PILOT is an amalgamated, electronic source of information consisting of both static and dynamic data for pile load tests conducted in the State of Iowa. The database, which includes historical data on pile load tests dating back to 1966, is intended for use in the establishment of LRFD resistance factors for design and construction control of driven pile foundations in Iowa. Although a considerable amount of geotechnical and pile load test data is available in literature as well as in various State Department of Transportation files, PILOT is one of the first regional databases to be exclusively used in the development of LRFD resistance factors for the design and construction control of driven pile foundations. Currently providing an electronically organized assimilation of geotechnical and pile load test data for 274 piles of various types (e.g., steel H-shaped, timber, pipe, Monotube, and concrete), PILOT (http://srg.cce.iastate.edu/lrfd/) is on par with such familiar national databases used in the calibration of LRFD resistance factors for pile foundations as the FHWA's Deep Foundation Load Test Database. By narrowing geographical boundaries while maintaining a high number of pile load tests, PILOT exemplifies a model for effective regional LRFD calibration procedures.

Developing Production Pile Driving Criteria from Test Pile Data

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Publisher : Transportation Research Board
ISBN 13 : 0309143357
Total Pages : 518 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Developing Production Pile Driving Criteria from Test Pile Data by : Dan A. Brown

Download or read book Developing Production Pile Driving Criteria from Test Pile Data written by Dan A. Brown and published by Transportation Research Board. This book was released on 2011 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 418: Developing Production Pile Driving Criteria from Test Pile Data provides information on the current practices used by state transportation agencies to develop pile driving criteria, with special attention paid to the use of test pile data in the process.

Development of Resistance Factors for Axial Capacity of Driven Piles in North Carolina

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ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (516 download)

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Book Synopsis Development of Resistance Factors for Axial Capacity of Driven Piles in North Carolina by : Kyung Jun Kim

Download or read book Development of Resistance Factors for Axial Capacity of Driven Piles in North Carolina written by Kyung Jun Kim and published by . This book was released on 2002 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: pile bearing capacity, load and resistance factor design, Vesic, Nordlund, Meyerhof, reliability analysis, FORM, MVFOSM, AFOSM, resistance factor calibration, pile driving analyzer, static load test, bias factor.

Calibration of Resistance Factors for Axial Capacity of Driven Pile Into Missouri Soil

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Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (68 download)

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Book Synopsis Calibration of Resistance Factors for Axial Capacity of Driven Pile Into Missouri Soil by : Mulugeta Abay Kebede

Download or read book Calibration of Resistance Factors for Axial Capacity of Driven Pile Into Missouri Soil written by Mulugeta Abay Kebede and published by . This book was released on 2010 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Over the past two decades the load resistance factor design (LRFD) has been accepted by the American Association for Transportation and Highway Officials (AASHTO) for the design of bridges. This approach is now gaining widespread popularity in the United States for substructure bridge design, including the design of driven pile foundations, as the states calibrate the geotechnical resistance factors for local geological conditions and practices. This study presents the geotechnical resistance factors calibrated for axially driven pile using the first-order reliability method (FORM) for the target reliability index of 2.33 and 3.0 based on 64 end-of-drives (EOD) and 22 beginning-of restrike (BOR) pile driving analyzer (PDA) test data from nine bridge sites in Missouri. Three static pile capacity prediction methods were used, i.e. the Nordlund, Meyerhof and Beta methods. The work investigated the efficiency of each method based on the bias factor, the ratio of the measured to the predicted capacity of the pile, ([lambda] = R[subscript m]/R[subscript p]), the coefficient of variation (COV), and efficiency factor or the ratio of the resistance factor to the bias factor, ([phi]/[lambda]). It verified that the Beta and Nordlund methods provide better predictions than the Meyerhof method. In addition, a comparison of the resistance factor in current AASHTO LRFD with the calibrated resistance factor shows that validating the resistance factors in the AASHTO may result in less reliable design. Finally, the recommended resistance factors for LRFD design are provided for use in Missouri. In addition, further refinement of the developed resistance factors is recommended to improve the resistance factors using large quantity and high quality of data that cover wide areas the glaciated plain and southeast lowland geological regions"--Abstract, leaf iii.

Driven Pile Load Test Data Analysis and Calibration of LRFD Resistance Factor for Mississippi Soils

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Publisher :
ISBN 13 :
Total Pages : 73 pages
Book Rating : 4.:/5 (124 download)

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Book Synopsis Driven Pile Load Test Data Analysis and Calibration of LRFD Resistance Factor for Mississippi Soils by : Eric Steward

Download or read book Driven Pile Load Test Data Analysis and Calibration of LRFD Resistance Factor for Mississippi Soils written by Eric Steward and published by . This book was released on 2018 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

New Static Analysis Methods and Improved Wave Equation Analysis Program for Driven Piles in Intermediate Geomaterials with Load and Resistance Factor Design Recommendations

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ISBN 13 :
Total Pages : 221 pages
Book Rating : 4.7/5 (621 download)

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Book Synopsis New Static Analysis Methods and Improved Wave Equation Analysis Program for Driven Piles in Intermediate Geomaterials with Load and Resistance Factor Design Recommendations by : Harish Kumar Kalauni

Download or read book New Static Analysis Methods and Improved Wave Equation Analysis Program for Driven Piles in Intermediate Geomaterials with Load and Resistance Factor Design Recommendations written by Harish Kumar Kalauni and published by . This book was released on 2021 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate and reliable methods to predict resistances of driven piles in intermediate geomaterials (IGMs) are essential for improving the economics of pile design and construction.However, static analysis methods for driven piles in IGMs are rarely available. Past experiences have suggested that estimating pile resistances in IGMs using the conventional static analysis methods for soils can lead to several problems regarding pile design and construction. Thus, this study aims to develop static analysis methods and Load and Resistance Factor Design (LRFD)resistance factors to facilitate the design of driven piles in claystone, sandstone, and mudstone. Moreover, Wave Equation Analysis Program (WEAP) has been widely used to determine drivability, predict static pile resistance, and assure the integrity of piles in soils. Assigning staticand dynamic properties of IGMs remains a challenge in WEAP, partly attributed to lack of reliablemethods for unit resistance predictions for driven piles in IGMs. The challenge is further exacerbated as the recommended Smith parameters were originally developed for piles in soils.Using 129 steel H- and pipe piles driven in IGMs, improved WEAP methods and newly calibrated LRFD resistance factors are recommended. These recommendations are based on proposed static analysis methods and back-calculated Smith parameters for IGMs. An additional 46 test pile data was used to validate the recommendations. Finally, the economic impact of these WEAPrecommendations on the design and construction control of driven piles in IGMs was studied,which confirmed the economic benefits of the proposed improved WEAP methods.

Accuracy of Static Capacity Methods and Calibration of Resistance Factors for Driven Piles in Rhode Island Soils

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ISBN 13 :
Total Pages : 306 pages
Book Rating : 4.:/5 (818 download)

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Book Synopsis Accuracy of Static Capacity Methods and Calibration of Resistance Factors for Driven Piles in Rhode Island Soils by : Sean Davis

Download or read book Accuracy of Static Capacity Methods and Calibration of Resistance Factors for Driven Piles in Rhode Island Soils written by Sean Davis and published by . This book was released on 2012 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Dynamic Pile Testing Technology

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ISBN 13 :
Total Pages : 244 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Dynamic Pile Testing Technology by : Robert Y. Liang

Download or read book Dynamic Pile Testing Technology written by Robert Y. Liang and published by . This book was released on 2007 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven piles are widely used as foundations to support buildings, bridges, and other structures. In 2007, AASHTO has adopted LRFD method for foundation design. The probability based LRFD approach affords the mathematical framework from which significant improvements on the design and quality control of driven piles can be achieved. In this research, reliability-based quality control criteria for driven piles are developed based on the framework of acceptance-sampling analysis for both static and dynamic test methods with the lognormal distribution characteristics. As a result, an optimum approach is suggested for the number of load tests and the required measured capacities for quality control of driven piles. Furthermore, this research has compiled a large database of pile set-up, from which the reliability-based approach of FORM is employed to develop separate resistance factors for the measured reference (initial) capacity and predicted set-up capacity. This report also provides a Bayesian theory based approach to allow for combining the information from the static pile capacity calculation and dynamic pile testing data to improve pile design process. Specifically, the results from dynamic pile tests can be utilized to reduce the uncertainties associated with static analysis methods of pile capacity by updating the corresponding resistance factors. This research has also developed one-dimensional wave equation based algorithm to interpret the High Strain Testing (HST) data for the estimation of the shaft and toe resistance of driven piles. The closed form solution is obtained for determining the Smith damping factor and the static soil resistance. Finally, a set of new wireless dynamic testing equipment (both hardware and software) is developed for more efficient dynamic pile testing.

Establishment of a Suitable Dynamic Formula for the Construction Control of Driven Piles and Its Calibration for Load and Resistance Factor Design

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ISBN 13 :
Total Pages : 234 pages
Book Rating : 4.:/5 (646 download)

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Book Synopsis Establishment of a Suitable Dynamic Formula for the Construction Control of Driven Piles and Its Calibration for Load and Resistance Factor Design by : Matthew John Roling

Download or read book Establishment of a Suitable Dynamic Formula for the Construction Control of Driven Piles and Its Calibration for Load and Resistance Factor Design written by Matthew John Roling and published by . This book was released on 2010 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: