Seismic performance of buildings with thin RC bearing walls
Seismic performance of buildings with thin RC bearing walls
复制标题
薄壁钢筋混凝土承重墙建筑的抗震性能
DOI：
10.1016/j.engstruct.2011.10.007
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
F. López
中科院分区：
文献类型：
--
作者：
H. Gonzales;F. López
在拉丁美洲，迫切需要住房;因此，在过去几年中，在玻利维亚、哥伦比亚、厄瓜多尔、墨西哥、秘鲁、委内瑞拉和位于地震多发地区的其他国家，建造了相当数量的带有薄钢筋混凝土剪力墙的中等高度建筑物（通常最多五层），用于低成本住宅。这些墙厚10厘米，其加固主要由单层焊接钢丝网组成。这种施工技术提供了两个主要优点：经济和快速施工。这些建筑物不符合国际抗震规范，但一些国家法规要求不高，不妨碍使用薄承重墙。这些建筑物可能容易受到地震的影响，因为它们的延性低，实验信息不足，没有观察到损坏，在某些情况下，建筑质量差。这项工作描述了旨在为薄壁建筑提供可靠的抗震设计指南的更广泛的研究的初始步骤;最初的目标是分析这些建筑的抗震性能，提出初步的设计标准，并确定进一步的研究需求。这项研究的重点是位于秘鲁的建筑物，代表了其他国家的情况。通过推覆和非线性时程分析对结构的脆弱性进行了数值评估，结构参数是从现有的测试信息中获得的。结果表明，所分析的建筑物的抗震强度是不够的，但是，在结构设计的微小变化可能会显着提高其抗震性能。发布了廉价且易于实施的设计建议。
In Latin America there is an urgent need for housing; thus, during the last few years a relevant number of mid-height buildings (usually, up to five stories) with thin RC shear–walls have been constructed for low-cost dwellings in Bolivia, Colombia, Ecuador, Mexico, Peru, Venezuela, and other countries located in seismic-prone regions. These walls are 10cm thick and their reinforcement consists mainly of a single layer of welded wire mesh. This construction technology offers two main advantages: economy and rapidity of construction. These buildings do not fulfill the international seismic codes but some national regulations are less demanding, not preventing the use of thin bearing walls. These buildings might be vulnerable to earthquakes because of their low ductility, the insufficiency of the experimental information, the absence of observed damages and, in some cases, poor construction quality. This work describes the initial steps of a wider research aiming at providing reliable seismic design guidelines for thin-wall buildings; the initial objectives are analyzing the seismic performance of these buildings, proposing preliminary design criteria and identifying further research needs. This research focuses on buildings located in Peru, being representative of the situations in the other countries. The vulnerability is numerically evaluated by push-over and nonlinear time history analyses; the structural parameters are obtained from available testing information. The obtained results show that the seismic strength of the analyzed buildings is insufficient; however, minor changes in the structural design might improve significantly their seismic performance. Cheap and easy-to-implement design recommendations are issued.