Minimum thickness for ductile RC structural walls
Minimum thickness for ductile RC structural walls
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DOI：
10.1016/j.engstruct.2005.02.004
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发表时间：
2005-06-01
影响因子：
5.5
通讯作者：
Kunnath, SK
中科院分区：
文献类型：
--
作者：
Chai, YH;Kunnath, SK
混凝土建筑抗震设计中的一个重要问题是结构墙在强烈地震地面运动作用下的稳定性。由于墙的显著屈服而产生的大的拉伸应变是引起关注的原因，因为墙的稳定性取决于施加在墙上的拉伸应变的大小。存在一种临界条件，即在裂纹闭合之前，在载荷反向时可能发生过大的面外位移，从而导致壁屈曲。通过要求最小壁厚以确保面内横向强度可以在相反方向上充分发展，可以减轻不稳定的可能性。本文概述了一种评估最小墙体厚度的方法，并给出了一些参数的结果，包括地震动强度、纵向配筋率、楼板重量、墙地面积比和层数。将最小壁厚与现行建筑规范中的建议进行了比较。(c)2005爱思唯尔有限公司保留所有权利。
An important issue in seismic design of concrete buildings concerns the stability of structural walls when subjected to intense earthquake ground motions. Large tensile strains, developed as a result of significant yielding in the wall, are a cause for concern since the stability of the wall depends on the magnitude of the tensile strain imposed on the wall. A critical condition exists where excessive out-of-plane displacement may occur upon load reversal prior to crack closure causing the wall to buckle. The potential for instability can be mitigated by requiring a minimum wall thickness to ensure that the in-plane lateral strength can be fully developed in the reversed direction. A methodology for assessing the minimum wall thickness is outlined in this paper and results are presented for a number of parameters including the ground motion intensity, longitudinal reinforcement ratio, floor weight, wall-to-floor area ratio and number of stories. The minimum wall thickness is compared with recommendations in current building codes. (c) 2005 Elsevier Ltd. All rights reserved.