剪切型破坏模式的配筋砌块砌体剪力墙恢复力模型

发布时间：2018-06-20 15:01

本文选题：配筋砌块砌体 + 剪力墙　；参考：《工程力学》2014年01期

【摘要】：利用25片足尺全灌芯配筋砌块砌体剪力墙的低周往复荷载试验,研究了此种墙体在发生剪切型破坏模式下的恢复力模型。选取截面宽度包含190mm、240mm和290mm三种块型的墙体试验,研究了不同砌块孔洞率、竖向压应力、竖向和水平配筋率、墙体高宽比等参数对墙体破坏模式的影响。利用试验记录提出骨架曲线,其归一化骨架曲线符合带下降段的三折线模型。对试验数据进行回归分析,得到满足指数衰减规律的刚度衰减方程。提出适用于发生剪切型破坏模式的配筋砌块砌体剪力墙的滞回规则,此规则在卸载阶段用两折线表示,两折线采用不同的刚度值,第一卸载段采用初始刚度,第二卸载段采用本文提出的刚度衰减方程。该文提出的滞回模型能够较好模拟配筋砌块砌体剪力墙捏拢现象,模拟出的滞回曲线与试验记录到的曲线吻合良好。
[Abstract]:Based on the low cycle reciprocating load test of 25 full-scale full core reinforced masonry shear walls, the restoring force model of this wall under shear failure mode is studied. The section width includes three blocks of 190mm, 240mm and 290mm, and the hole and hole rate, vertical compressive stress, vertical and horizontal reinforcement ratio of different blocks are studied. The influence of the wall height to width ratio on the wall failure mode. The skeleton curve is put forward by the test records. The normalized skeleton curve is in line with the three fold line model with the descending section. The regression analysis of the test data is carried out to get the stiffness attenuation equation which satisfies the exponential decay law. The reinforcement block suitable for the shear failure mode is put forward. The rule of the hysteresis of the shear wall is expressed in the two fold line at the unloading stage, and the two fold line adopts different stiffness values. The first unloading section adopts the initial stiffness and the second unloading section adopts the stiffness attenuation equation proposed in this paper. The hysteresis model proposed in this paper can simulate the kneading phenomenon of the reinforced masonry shear wall better and the simulated hysteresis. The curve is in good agreement with the curve recorded by the test.
【作者单位】：哈尔滨工业大学土木工程学院;佳木斯大学建筑工程学院;黑龙江省建设集团有限责任公司;
【基金】：国家科技支撑计划项目(2011BAE14B05-03) 住房和城乡建设部研究开发项目(2010-k2-1) 黑龙江省建设集团有限公司联合科研项目(MH20100436) 佳木斯大学科学技术研究项目(L2012-028)
【分类号】：TU398.2

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