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Seismic Response Of Low Rise Masonry Buildings With Flexible Roof Diaphragms
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Book Synopsis Seismic Response of Low-Rise Masonry Buildings with Flexible Roof Diaphragms by : Gregory L. Cohen
Download or read book Seismic Response of Low-Rise Masonry Buildings with Flexible Roof Diaphragms written by Gregory L. Cohen and published by . This book was released on 2001-08-01 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study compares the responses from shaking-table testing and analytical predictions evaluated in the context of geometric scaling, to provide a coherent description of the seismic response of low-rise masonry buildings with flexible roof diaphragms. Two half-scale, low-rise reinforced masonry buildings with flexible roof diaphragms are subjected to carefully selected earthquake ground motion on the Tri-axial Earthquake and Shock Simulator at the Construction Engineering Research Laboratory. Damage to the half-scale specimens is assessed using published protocols. Geometric scaling analysis relates response and damage of the half-scale specimens to those of the full-scale prototype structures. Linear elastic modeling is simplified to a generalized two-degrees-of-freedom idealization. Response-spectrum analysis of such an idealization is accurate and justified for prediction of dynamic response of the half-scale specimens and the corresponding full-scale prototype. It is shown that low-rise masonry buildings with flexible roof diaphragms can be designed for seismic loads as single-degree-of- freedom systems, using the degree of freedom associated with the in-plane response of the diaphragm in the building's transverse direction, rather than the degree of freedom associated with the in- plane responses of the shear walls.
Book Synopsis Seismic Evaluation of Low-Rise Reinforced Masonry Buildings with Flexible Diaphragms by : Steven C. Sweeney
Download or read book Seismic Evaluation of Low-Rise Reinforced Masonry Buildings with Flexible Diaphragms written by Steven C. Sweeney and published by . This book was released on 2008 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides an integrated approach to the seismic evaluation of low-rise reinforced masonry buildings with flexible roof diaphragms. The paper is divided into four phases. In Phase 1 (Behavior), results from shaking-table testing, quasi-static testing, and analytical predictions are integrated to provide a coherent description of the seismic response of low-rise reinforced masonry buildings with flexible roof diaphragms. Two half-scale, low-rise reinforced masonry buildings with flexible roof diaphragms are subjected to earthquake ground motions on the Tri-axial Earthquake and Shock Simulator at the United States Army Construction Engineering Research Laboratory, Engineer Research and Development Center. Following the shaking-table tests, diaphragms and top four courses of attached masonry walls are salvaged from the half-scale structures and tested quasi-statically in their own plane. A new index, the diaphragm drift ratio, is introduced to describe the potential for diaphragm damage. In Phase 2 (Analysis), coordinated analytical modeling is developed and implemented to corroborate and extend the results of that experimental work, and to examine the efficacy and accuracy of different analytical modeling approaches. Linear elastic finite-element models, simplified two-degree-of-freedom models, and nonlinear lumped-parameter models are developed; all agree well with measured responses. In Phase 3 (Seismic Evaluation), the first two phases are used to develop and verify a simple extension to FEMA 310, the predominant seismic evaluation methodology for low-rise reinforced masonry buildings with flexible diaphragms. In Phase 4 (Application and Verification), the proposed extension, applied to four existing buildings, is shown to be simple, useful, and necessary.
Book Synopsis Seismic Strengthening of Low-rise Unreinforced Masonry Structures with Flexible Diaphragms by : Franklin Lehr Moon
Download or read book Seismic Strengthening of Low-rise Unreinforced Masonry Structures with Flexible Diaphragms written by Franklin Lehr Moon and published by . This book was released on 2003 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a capstone to several Mid-America Earthquake Center (MAE Center) projects, a full-scale two story unreinforced masonry (URM) building was tested following the application of several retrofit techniques, which included the use of fiber reinforced polymer (FRP) overlays, near surface mounted (NSM) rods, vertical unbonded post-tensioning, and joist anchors. The test structure was composed of four URM walls, flexible timber diaphragms and interior stud walls, and was designed and built following construction practices consistent with those used in Mid-America prior to 1950. Initial testing subjected both the roof diaphragm and in-plane walls to slowly applied lateral load reversals in an unreinforced sate. Following this series of tests, each in-plane wall was retrofit and retested. Experimental results indicated that global issues such as flange participation and the effects of overturning moment substantially impacted the response of primary components both before and after retrofit. FRP retrofit techniques resulted in strength increases up to 32% and displayed a pseudo-ductile response caused by progressive debonding. For cases where such retrofits forced sliding failures, large increases in energy dissipation resulted. The use of vertical unbonded post-tensioning resulted in strength increases between 40%-60%; however, piers displayed a tendency to switch from a ductile rocking/sliding mode to a more brittle diagonal tension mode. In addition, results highlighted the need for retrofit schemes to employ both horizontal and vertical reinforcement to prevent progressive crack opening that can decrease wall displacement capacity. Based on the experimental results, the model implied by the "Prestandard for the Rehabilitation of Existing Structures," FEMA 356, for the analysis of in-plane URM walls was modified and extended to (1) include the effect of FRP pier retrofits and (2) consider the global effects of URM structures. The resulting model displayed reasonable estimates of measured response both before and after retrofit, with an average error of 14%. In addition, the proposed model displayed improvements over the current model from 14% to 66%. Based on the results of sensitivity analyses this improved accuracy was primarily attributed to the consideration of global effects.
Book Synopsis Seismic Response of Low-rise Shear Wall Structures with Flexible Diaphragms by : Ho Jung Lee
Download or read book Seismic Response of Low-rise Shear Wall Structures with Flexible Diaphragms written by Ho Jung Lee and published by . This book was released on 2005 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Evaluation of Low-rise Reinforced Masonry Buildings with Flexible Diaphragms by : Gregory L. Cohen
Download or read book Seismic Evaluation of Low-rise Reinforced Masonry Buildings with Flexible Diaphragms written by Gregory L. Cohen and published by . This book was released on 2006 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Evaluation of Low-rise Reinforced Masonry Buildings with Flexible Diaphragms by :
Download or read book Seismic Evaluation of Low-rise Reinforced Masonry Buildings with Flexible Diaphragms written by and published by . This book was released on 2004 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tri-directional Seismic Analysis of an Unreinforced Masonry Building with Flexible Diaphragms by : Steven C. Sweeney
Download or read book Tri-directional Seismic Analysis of an Unreinforced Masonry Building with Flexible Diaphragms written by Steven C. Sweeney and published by . This book was released on 2004 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Response of a Half-scale Masonry Building with Flexible Diaphragms by : Steven C. Sweeney
Download or read book Seismic Response of a Half-scale Masonry Building with Flexible Diaphragms written by Steven C. Sweeney and published by . This book was released on 2005 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Evaluation and Rehabilitation of Low-rise Reinforced Masonry Buildings with Flexible Diaphragms by : Gregory L. Cohen
Download or read book Seismic Evaluation and Rehabilitation of Low-rise Reinforced Masonry Buildings with Flexible Diaphragms written by Gregory L. Cohen and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Analysis of Multi-Story Unreinforced Masonry Buildings with Flexible Diaphragms by : Juan Aleman Hernandez
Download or read book Seismic Analysis of Multi-Story Unreinforced Masonry Buildings with Flexible Diaphragms written by Juan Aleman Hernandez and published by . This book was released on 2014 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies regarding the regional seismicity of New York City (NYC) indicate that earthquakes of magnitude greater than or equal to 5 have a 20-40% probability of occurring in a 50 year period. Considering that more than 50% of the large population of the region (19.1 million) is living in an area where 80% of the buildings are of old Unreinforced Masonry (URM) construction, it is likely that even a moderate earthquake could have critical consequences on public safety and the economy of this area. The main goal of this study was to develop simulation capabilities supported by experimental testing to evaluate the seismic performance of typical unreinforced masonry buildings with flexible diaphragms located in NYC. Simplified nonlinear macro-models of wood diaphragms, masonry walls and floor-to-wall connections were developed and validated individually using data from past experiments. The models are implemented in both commercial and research software to demonstrate their practical use. In particular, a new approach for modeling flexible diaphragms is proposed that is shown to provide similar accuracy to detailed finite element models at a fraction of the computation cost. The models developed were also validated as at the system level, through shake table testing of two full-scale specimens conducted as part of this study. The specimens were designed and constructed to represent the expected loading conditions of a central portion of a one-story URM building and constructed of materials representative of older masonry construction. The tests provide a unique data set that captures the interaction between flexible floors, out-of-plane walls and their connections at, full scale.The validated macro-models can be used for performance-based seismic assessment of unreinforced masonry building in NYC and elsewhere. To demonstrate their use, preliminary studies were conducted to develop out-of-plane URM fragility curves, a building-specific collapse fragility function, and estimate the seismic response of the building when subjected to a ground shaking intensity similar to the 2011 Virginia Earthquake. The probabilistic framework and new performance definitions provided by the FEMA P58 project were used to conduct a performance-based seismic assessment for an archetype unreinforced masonry building in New York City with an emphasis on out-of-plane behavior. This preliminary study served to demonstrate the applicability of the proposed models for applications in performance-based design.
Book Synopsis Seismic Design Manual, 3rd Edition by :
Download or read book Seismic Design Manual, 3rd Edition written by and published by . This book was released on 2018-07 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Response of an Instrumented Masonry Shear Wall Building with Flexible Diaphragms During the Loma Prieta Earthquake by : Arturo Tena-Colunga
Download or read book Response of an Instrumented Masonry Shear Wall Building with Flexible Diaphragms During the Loma Prieta Earthquake written by Arturo Tena-Colunga and published by . This book was released on 1992 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Seismic Evaluation and Rehabilitation of Tilt-up Buildings and Other Rigid Wall/flexible Diaphragm Structures by :
Download or read book Guidelines for Seismic Evaluation and Rehabilitation of Tilt-up Buildings and Other Rigid Wall/flexible Diaphragm Structures written by and published by . This book was released on 2001 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Earthquake Engineering Handbook by : Charles Scawthorn
Download or read book Earthquake Engineering Handbook written by Charles Scawthorn and published by CRC Press. This book was released on 2002-09-27 with total page 1508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquakes are nearly unique among natural phenomena - they affect virtually everything within a region, from massive buildings and bridges, down to the furnishings within a home. Successful earthquake engineering therefore requires a broad background in subjects, ranging from the geologic causes and effects of earthquakes to understanding the imp
Book Synopsis Dynamic Response of Unreinforced Masonry Buildings with Flexible Diaphragms by : A. C. Costley
Download or read book Dynamic Response of Unreinforced Masonry Buildings with Flexible Diaphragms written by A. C. Costley and published by . This book was released on 1996 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Structural Engineering by : W.F. Chen
Download or read book Handbook of Structural Engineering written by W.F. Chen and published by CRC Press. This book was released on 2005-02-28 with total page 1765 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing the best-selling tradition of the Handbook of Structural Engineering, this second edition is a comprehensive reference to the broad spectrum of structural engineering, encapsulating the theoretical, practical, and computational aspects of the field. The contributors cover traditional and innovative approaches to analysis, design, and rehabilitation. New topics include: fundamental theories of structural dynamics; advanced analysis; wind- and earthquake-resistant design; design of prestressed structures; high-performance steel, concrete, and fiber-reinforced polymers; semirigid frame structures; structural bracing; and structural design for fire safety.
Book Synopsis Structural Analysis of Historic Construction: Preserving Safety and Significance, Two Volume Set by : Dina D'Ayala
Download or read book Structural Analysis of Historic Construction: Preserving Safety and Significance, Two Volume Set written by Dina D'Ayala and published by CRC Press. This book was released on 2008-06-02 with total page 1590 pages. Available in PDF, EPUB and Kindle. Book excerpt: The successful preservation of an historic building, complex or city depends on the continued use and daily care that come with it. The possibility of continued use depends on the adaptation of the building to modern standards and practice of living, requiring changes in constructional or structural features. Conservation engineering is the process
