高强混凝土剪力墙非线性有限元分析

采用ANSYS软件对高强混凝土剪力墙在单向水平荷载作用下的受力过程进行了非线性有限元分析。在有限元分析中,考虑了高强混凝土的特点、混凝土开裂后的影响和压碎后的应力软化,采用位移控制法,较好地解决了下降段的问题,分析结果与试验结果比较吻合。重点分析了混凝土强度等级、边柱纵筋配筋率、边柱箍筋体积配箍率、竖向分布钢筋配筋率、水平分布钢筋配筋率和轴压比等因素对高强混凝土剪力墙基本性能的影响,讨论了变化规律,并提出了保证其基本性能的一些建议。

SIMULATION ANALYSIS ON BASIC BEHAVIOR OF HIGH-STRENGTH CONCRETE SHEAR WALL

Using the software of ANSYS,it was carried out nonlinear finite element analysis upon the basic behavior of high-strength concrete shear wall subjected to monodirectional lateral load.Considering the characteristic of highstrength concrete,the effect of concrete's craze and the stress-softening after the concrete crushing,the problem of falling branch was solved comparatively well with displacement-controlled manner.Analytical load-displacement curves were found in a good agreement with the test results.Focused on factors which influence basic behavior such as concrete grades,the ratio of boundary longitudinal reinforcement to boundary element,the volumetric ratio of transverse reinforcement at the boundary element,the ratio of web vertical reinforcement,the ratio of web horizontal reinforcement and axial load ratio,it was also discussed their changing rules,and brought forward some suggestions to guarantee the basic behavior of high-strength concrete shear wall.