弯曲破坏模式配筋砌块砌体剪力墙刚度方程研究  

Research on stiffness equation of reinforced-block masonry shear walls dominated flexure failure mode

作　　者：赵艳[1] 刘洪波[2] 白旭峰 王昭宁 陶冬冬 薛景 ZHAO Yan;LIU Hong-Bo;BAI Xu-Feng;WANG Zhao-Ning;TAO Dong-Dong;XUE Jing(College of Architecture and Civil Engineering,Jiamusi University,Jiamusi 154007,China;School of Civil Engineering and Architecture,Heilongjiang University,Harbin 150080,China;North China Municipal Engineering Design&Research Institute,Tianjin 300074,China)

机构地区：[1]佳木斯大学建筑工程学院,黑龙江佳木斯154007 [2]黑龙江大学建筑工程学院,哈尔滨150080 [3]中国市政工程华北设计研究总院有限公司,天津300074

出　　处：《黑龙江大学工程学报》2018年第1期12-16,26,共6页Journal of Engineering of Heilongjiang University

基　　金：黑龙江省教育厅人才培养项目(2016-KYYWF-0112)

摘　　要：利用18片弯曲破坏模式的足尺全灌芯配筋砌块砌体剪力墙的低周往复荷载试验,研究了在压弯剪复合受力状态下墙体的刚度衰减方程。墙体所用砌块的种类有190型、240型、290型3种,通过试验得到的滞回曲线,计算墙体的刚度,然后对刚度进行归一化,分别对初始刚度的归一化和峰值点刚度的归一化,得到刚度退化系数α_0=K_i/K_0和α_m=K_i/K_m。针对各次试验的刚度退化系数采用指数函数和多项式函数进行回归分析,得到了此种墙体的刚度衰减方程。研究结果表明:各次试验尽管参数不同,但得到的刚度拟合曲线比较接近,尤其是α_m曲线表现得更明显;无论是α_0还是α_m,采用多项式函数拟合的曲线与试验计算值更加接近;相比于指数函数,多项式函数的衰减更加缓慢,更能准确地反应此种墙体刚度的变化规律。Furthermore,it can be shown that the stiffness regression curves by the polynomial equation is more close to the test than the exponential equation,and the attenuation of the polynomial equation is more slowly,therefore it can incarnate the stiffness attenuation rule of the wall more accurately.Stiffness degradation equation of the reinforced-block masonry shear walls is investigated combined action of compression,moment and shear,based on the tests of 18 full-scale fully grouted reinforced concrete masonry(FGRM)dominated flexure failure mode subjected to low^cyclic reversed lateral loads.The block masonry used to build these walls includes three different cross-section width,190 mm,240 mm and 290 mm,and the stiffness of walls are computed from the hysteretic curves after the tests,and then the normalized stiffness curves were derived.The coefficient of stiffness degradation of walls was calculated by two methods,one is to be normalized by the initial stiffness,#〇=K/K〇,the other is by the peak stiffness,#=?-?m.Then,the coefficient of stiffness degradation of walls was integrated by two methods to acquisition stiffness equation,one is to be regressed by the exponential equation,the other is by the polynomial equation.It is demonstrated that the stiffness regression curves are close,although the parameters of the sample models are

关 键 词：配筋砌块砌体 剪力墙 刚度方程 弯曲破坏模式 指数方程 多项式方程 

分 类 号：TU365.02[建筑科学—结构工程]