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Author : Gregory L. Cohen
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (824 download)
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:
Author : Steven C. Sweeney
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (125 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (946 download)
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:
Author : Gregory L. Cohen
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (671 download)
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:
Author : Gregory L. Cohen
Publisher :
ISBN 13 : 9781423523277
Total Pages : 147 pages
Book Rating : 4.5/5 (232 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.3/5 (91 download)
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:
Author : Brian Trimble
Publisher : ASTM International
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.F/5 ( download)
Download or read book Masonry written by Brian Trimble and published by ASTM International. This book was released on 2008 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers from a June 2006 symposium report on recent work in cement, lime, mortars for unit masonry, and manutactured masonry units. Some specific topics covered include investigation and repair of glazed brick cladding, the benefits and problems of ASTM C 1324 for analyzing hardened masonry mortars, time-of-cooling effects on mortar joint color, and the selection and use of natural and manufactured stone adhered veneer. Other subjects examined include defection criteria for masonry beams, the effect of void area on brick masonry performance, seismic evaluation of low-rise reinforced masonry buildings with flexible diaphragms, and greening of mortars. B&w photos and illustrations are included. Trimble is affiliated with the Brick Industry Association. Brisch is affiliated with Rockwell Lime Company. There is no subject index.
Author : Franklin Lehr Moon
Publisher :
ISBN 13 :
Total Pages : 1298 pages
Book Rating : 4.:/5 (556 download)
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.
Author : Juan Aleman Hernandez
Publisher :
ISBN 13 :
Total Pages : 374 pages
Book Rating : 4.:/5 (965 download)
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.
Author :
Publisher :
ISBN 13 : 9781564240354
Total Pages : pages
Book Rating : 4.2/5 (43 download)
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:
Author : Ho Jung Lee
Publisher :
ISBN 13 :
Total Pages : 520 pages
Book Rating : 4.:/5 (71 download)
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:
Author : Sang-Cheol Kim
Publisher :
ISBN 13 :
Total Pages : 834 pages
Book Rating : 4.:/5 (526 download)
Download or read book Seismic Assessment of Low-rise Shear Wall Buildings with Non-rigid Diaphragms written by Sang-Cheol Kim and published by . This book was released on 2003 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Steven C. Sweeney
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (556 download)
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:
Author : Nikolina Kourteva Dinkova
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (331 download)
Download or read book Seismic and Wind Resistance Evaluation of Low-rise Masonry Buildings written by Nikolina Kourteva Dinkova and published by . This book was released on 1995 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph H. Brisch
Publisher : ASTM International
ISBN 13 : 080312600X
Total Pages : 169 pages
Book Rating : 4.8/5 (31 download)
Download or read book Masonry written by Joseph H. Brisch and published by ASTM International. This book was released on 1999 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers from a June 2006 symposium report on recent work in cement, lime, mortars for unit masonry, and manutactured masonry units. Some specific topics covered include investigation and repair of glazed brick cladding, the benefits and problems of ASTM C 1324 for analyzing hardened masonry mortars, time-of-cooling effects on mortar joint color, and the selection and use of natural and manufactured stone adhered veneer. Other subjects examined include defection criteria for masonry beams, the effect of void area on brick masonry performance, seismic evaluation of low-rise reinforced masonry buildings with flexible diaphragms, and greening of mortars. B&w photos and illustrations are included. Trimble is affiliated with the Brick Industry Association. Brisch is affiliated with Rockwell Lime Company. There is no subject index.
Author : United States. Dept. of the Army
Publisher :
ISBN 13 :
Total Pages : 332 pages
Book Rating : 4.3/5 (91 download)
Download or read book Seismic Design for Buildings written by United States. Dept. of the Army and published by . This book was released on 1966 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James L. Martin
Publisher : CRC Press
ISBN 13 : 1138000868
Total Pages : 5742 pages
Book Rating : 4.1/5 (38 download)
Download or read book Hydro-Environmental Analysis written by James L. Martin and published by CRC Press. This book was released on 2013-12-04 with total page 5742 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on fundamental principles, Hydro-Environmental Analysis: Freshwater Environments presents in-depth information about freshwater environments and how they are influenced by regulation. It provides a holistic approach, exploring the factors that impact water quality and quantity, and the regulations, policy and management methods that are necessary to maintain this vital resource. It offers a historical viewpoint as well as an overview and foundation of the physical, chemical, and biological characteristics affecting the management of freshwater environments. The book concentrates on broad and general concepts, providing an interdisciplinary foundation. The author covers the methods of measurement and classification; chemical, physical, and biological characteristics; indicators of ecological health; and management and restoration. He also considers common indicators of environmental health; characteristics and operations of regulatory control structures; applicable laws and regulations; and restoration methods. The text delves into rivers and streams in the first half and lakes and reservoirs in the second half. Each section centers on the characteristics of those systems and methods of classification, and then moves on to discuss the physical, chemical, and biological characteristics of each. In the section on lakes and reservoirs, it examines the characteristics and operations of regulatory structures, and presents the methods commonly used to assess the environmental health or integrity of these water bodies. It also introduces considerations for restoration, and presents two unique aquatic environments: wetlands and reservoir tailwaters. Written from an engineering perspective, the book is an ideal introduction to the aquatic and limnological sciences for students of environmental science, as well as students of environmental engineering. It also serves as a reference for engineers and scientists involved in the management, regulation, or restoration of freshwater environments.
