Evaluation of collapse resistance of reinforced masonry wall systems by shake‐table tests
Evaluation of collapse resistance of reinforced masonry wall systems by shake‐table tests
复制标题
通过振动台试验评价加筋砌体墙系统的抗倒塌性能
DOI：
10.1002/eqe.3342
复制
发表时间：
2020
影响因子：
4.5
通讯作者：
Shing, P. Benson
中科院分区：
文献类型：
--
作者：
Cheng, Jianyu;Koutras, Andreas A.;Shing, P. Benson
本文提出了一项振动台试验研究，以研究剪力为主的加筋砌体墙体体系的位移能力，以及墙缘和垂直于振动方向的平面墙（面外墙）对墙体体系抗震性能的影响。两个全尺寸、单层、全灌浆、加筋砌体墙试件被测试到崩溃的边缘。每个试件都有两个T型墙作为抗震单元和一个刚性屋顶隔膜。第二个试样有六个垂直于震动方向的额外平面壁。2个试件最大顶板漂移比分别达到17%和13%，均未发生垮塌。高位移能力在很大程度上归因于墙体法兰的存在，对于第二个试件，也归因于面外墙体的存在，当T型墙的腹板严重损坏时，它提供了另一种荷载路径来承受重力荷载。第二个试件比第一个试件产生了更高的侧向阻力，这是由于当前者摇晃时，面外壁对T型墙施加了额外的轴向压缩。当考虑额外轴压时，用设计规范公式计算的T型墙抗剪性能与试验结果吻合较好。然而，必须理解的是，由于P‐Δ效应，墙体法兰的有益影响取决于重力载荷的大小，以及当墙体系统受到双向地面运动时，墙体法兰所引起的损伤的严重程度。
This paper presents a shake‐table test study to investigate the displacement capacity of shear‐dominated reinforced masonry wall systems and the influence of wall flanges and planar walls perpendicular to the direction of shaking (out‐of‐plane walls) on the seismic performance of a wall system. Two full‐scale, single‐story, fully grouted, reinforced masonry wall specimens were tested to the verge of collapse. Each specimen had two T‐walls as the seismic force‐resisting elements and a stiff roof diaphragm. The second specimen had six additional planar walls perpendicular to the direction of shaking. The two specimens reached maximum roof drift ratios of 17% and 13%, without collapsing. The high displacement capacities can be largely attributed to the presence of wall flanges and, for the second specimen, also the out‐of‐plane walls, which provided an alternative load path to carry the gravity load when the webs of the T‐walls had been severely damaged. The second specimen developed a higher lateral resistance than the first owing to the additional axial compression exerted on the T‐walls by the out‐of‐plane walls when the former rocked. The shear resistance of the T‐walls evaluated with the design code formula matches the test result well when this additional axial compression is taken into account. However, it must be understood that the beneficial influence of the wall flanges depends on the magnitude of the gravity load because of the P‐Δ effect and the severity of damage induced in the wall flanges when the wall system is subjected to bidirectional ground motions.
非对称钢筋混凝土砌块剪力墙建筑的系统级抗震性能评估
DOI：
10.1061/(asce)st.1943-541x.0001298
发表时间：
2015
期刊：
Journal of Structural Engineering-asce
影响因子：
--
作者：
P. Heerema;M. Shedid;D. Konstantinidis;W. El
通讯作者：
W. El