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原文传递 Strength and Seismic Performance Factors of Posttensioned Masonry Walls

题名：	Strength and Seismic Performance Factors of Posttensioned Masonry Walls
其他题名：	ASCE.(2010)."Minimum design loads for buildings and other structures."ASCE/SEI 7-10,Reston,VA.
正文语种：	英文
作者：	Reza Hassanli
关键词：	mason；actor；route；wall；compatibility；prediction；recommend；supplement；tens；different
摘要：	In this study, the behavior of posttensioned masonry walls is investigated using a database of 31 tested walls. The accuracy of the current Masonry Standards Joint Committee (MSJC) in evaluating the strength of posttensioned masonry walls is studied using the available test results. Moreover, using the experimental results, the seismic performance factors including ductility, response modification factor, and displacement amplification factor are determined for different types of walls including fully grouted, partially grouted, ungrouted walls, walls with confinement plates, walls with supplemental mild steel, and walls with an opening. As a result of this study, it was determined that the MSJC underestimates the strength of fully grouted unbonded posttensioned walls by about 20％. Using the strain compatibility method to determine the flexural capacity of bonded masonry walls resulted in reasonable predictions of strength. Moreover, an average response modification factor of 4.27 to 7.76 and displacement amplification factor of 3.5 are estimated for posttensioned fully grouted masonry walls. The ductility and response modification factor for ungrouted and partially grouted walls and walls with an opening were much lower than those of fully grouted walls. It was found that the R-factor of partially grouted walls can be estimated by linear interpolation between the R-factors of ungrouted and fully grouted walls. This study also concluded that the axial stress ratio has a prominent effect on the ductility of posttensioned masonry walls. To provide a ductile response, based on the findings, it is recommended to limit the axial stress ratio to a value of 0.15.
出版年：	2015
论文唯一标识：	P-26Y2015V141N11023
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)ST.1943-541X.0001272
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	141
期：	11
页码：	247-261