摘要
对钢框架内填两边连接钢筋混凝土剪力墙的简化有限元模型进行了研究,探讨了在结构弹性内力分析中采用剪切膜单元模拟内填RC墙板的可行性。设计了3个平面钢框架内填两边连接RC剪力墙算例;对墙板分别采用平面应力单元和剪切膜单元建立了结构有限元模型,计算了结构弹性内力和变形;分析对比了2种有限元模型得出的墙板剪力、框架内力的差别;对比了2种有限元模型计算结果中墙板和框架的剪力占比,轴力占比及倾覆力矩占比。分析结果表明:用剪切膜单元模拟墙板剪力、结构变形是可行的;模拟出的框架内力误差较大;分析了墙板厚度和混凝土强度变化对2种有限元模型计算结果的影响,结果表明:剪切膜单元模拟结果对墙板厚度和墙板混凝土强度的改变不敏感。
This research is aimed at the investigation of the simplified FE modes of reinforced concrete infill wall(RCIW)connected only to frame beams.The possibility of using shear membrane element to the internal force analysis of steel frame(SF)with RCIW is studied.3 SF-RCIW specimens with the RCIW connected only to frame beams are designed.Using the plane stress element and shear membrane element,respectively,the FE models of RC wall in the SF-RCIW are established;the structural internal forces and lateral drift are simulated,the differences between the plane stress element model and the shear membrane element model are analyzed;the shear ratio,axial force ratio and overturning moment ratio of the RCIW in the two finite FE models are compared.It can be seen from the analytical results that the shear membrane element is feasible to simulate the RCIW shear force and the structural lateral drift,but the shear membrane element is not feasible to simulate the internal forces of steel frame.The effects of wall thickness and concrete strength on the calculation results of the two FE models are analyzed,the calculation results show that the shear membrane element are not sensitive to the changes of the thickness and concrete strength of RCIW.
作者
徐美华
顾强
XU Mei-hua;GU Qiang(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou Jiangus 215011China)
出处
《江苏建筑》
2020年第5期49-53,共5页
Jiangsu Construction
基金
国家自然科学基金项目(51678382)。
关键词
两边连接
内力分析
剪力墙
平面应力单元
剪切膜单元
two-side connections
internal force analysis
shear wall
plane stress element
shear membrane element
