配筋砌块砌体短肢剪力墙恢复力模型

发布时间：2018-05-15 07:09

本文选题：配筋砌块砌体 + 短肢剪力墙　；参考：《建筑结构学报》2014年01期

【摘要】：通过18片足尺全灌芯配筋砌块砌体短肢剪力墙低周往复荷载试验,研究了在压弯剪复合受力下墙体的抗震性能、刚度衰减方程以及恢复力模型。选取截面厚度包含190、240 mm和290 mm共3种块型的墙体,基于试验得到墙体骨架曲线,并计算得到归一化骨架曲线,简化为带下降段的三折线模型。通过计算得到模型中各阶段刚度比,用于确定骨架曲线的特征点。针对各次试验的刚度进行回归分析,得到满足指数衰减规律的刚度方程,据此提出了一种适用于配筋砌块砌体短肢剪力墙的滞回规则,并根据骨架曲线的各特征点,模拟了各次试验的滞回曲线。研究结果表明:模拟曲线能较好地反映配筋砌块砌体短肢剪力墙的"捏拢"现象,此恢复力模型可用于地震作用下配筋砌块砌体短肢剪力墙的非线性动力反应分析。
[Abstract]:In this paper, the seismic behavior, stiffness attenuation equation and restoring force model of 18 fully-filled reinforced masonry with short leg shear wall under compression, bending and shear combined forces are studied by low-cycle reciprocating load test. Three types of wall with 190240 mm and 290mm section thickness were selected. The wall skeleton curve was obtained based on the experiment, and the normalized skeleton curve was calculated, which was simplified into a three-fold line model with descending section. The stiffness ratio of each stage in the model is calculated to determine the characteristic points of the skeleton curve. According to the regression analysis of the stiffness of each test, the stiffness equation satisfying the law of exponential attenuation is obtained. Based on this, a hysteretic rule suitable for reinforced masonry short leg shear wall is proposed, and according to the characteristic points of the skeleton curve, The hysteretic curves of each experiment are simulated. The results show that the simulated curve can well reflect the "pinch" phenomenon of short leg shear wall of reinforced block masonry, and this restoring force model can be used to analyze the nonlinear dynamic response of short leg shear wall of reinforced block masonry subjected to earthquake.
【作者单位】：哈尔滨工业大学结构工程灾变与控制教育部重点实验室;哈尔滨工业大学土木工程学院;佳木斯大学建筑工程学院;中国地震局工程力学研究所;
【基金】：国家科技支撑计划项目(2013BAJ12B03) 黑龙江省建设集团有限公司联合科研项目(MH20100436)
【分类号】：TU365

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