现浇磷石膏-混凝土网格式框架组合墙在竖向荷载作用下协同工作性能分析  

Analysis of cooperative performance of cast-in-situ phosphogypsum-concrete grid frame composite wall under vertical load

作　　者：吴琴 张华刚[2] 杨想红[1] 王林均[1] 马克俭[2] WU Qin;ZHANG Hua-gang;YANG Xiang-hong;WANG Lin-jun;MA Ke-jian(Architectural Engineering College,Guizhou Min Zu University,Guiyang 550025,China;Space Structures Research Center,Guizhou University,Guryang 550003,China)

机构地区：[1]贵州民族大学建筑工程学院,贵州贵阳550025 [2]贵州大学空间结构研究中心,贵州贵阳550003

出　　处：《空间结构》2021年第1期44-51,共8页Spatial Structures

基　　金：国家自然科学基金项目(51168008);贵州省科技计划项目(黔科合基础[2019]1173号)。

摘　　要：现浇磷石膏-混凝土网格式框架组合墙是由混凝土网格式框架和现浇磷石膏共同组成.为了解现浇磷石膏对组合墙竖向承载力的影响,推导了在竖向荷载作用下组合墙中混凝土网格式框架的荷载分配系数,分析并确定了混凝土网格式框架与现浇磷石膏的协同工作的影响因素.通过有限元分析研究楼层梁截面高度、柱截面宽度、梁跨度等因素对荷载分配系数及两者协同工作的影响,检验理论公式的正确性.结果表明:混凝土网格式框架荷载分配系数的理论计算结果与有限元分析结果误差小于7%,计算精度较好;现浇磷石膏的弹性模量对荷载分配系数的影响最大,柱截面宽度的影响次之,梁柱的混凝土等级对其影响较小;将有限元分析结果、试验结果与理论计算结果进行对比,混凝土网格式框架的荷载分配系数公式具有理想的计算精度,可为结构的工程应用提供参考.The cast-in-situ phosphogypsum-concrete grid frame composite wall is composed of concrete grid frame and cast-in-situ phosphogypsum.In order to understand the influence of cast-in-situ phosphogypsum on vertical bearing capacity of the composite wall, load distribution coefficient of the cooperative grid frame in the composite wall under vertical load is derived, and the influencing factors of the collaborative work between concrete grid frame and cast-in-situ phosphogypsum are analyzed and determined.Through finite element analysis, the influences of floor beam height, column section size, beam span and other factors on the load distribution coefficient and the cooperative work are studied, and the accuracy of the theoretical calculation formula is verified. Results show that the error of the load distribution coefficient between the theoretical calculation result and the finite element analysis result is less than 7%,and the calculation accuracy is good.The elastic modulus of cast-in-situ phosphogypsum has the greatest influence on the load distribution coefficient, and the influence of column height is followed. The concrete grade of beam and column has less influence on it.Comparing results from finite element analysis, test and theoretical calculations, the load distribution coefficient formula of concrete grid frame has ideal calculation accuracy, providing reference for the engineering application of the structure.

关 键 词：现浇磷石膏 网格式框架 荷载分配系数 有限元分析 试验研究 

分 类 号：TU375.4[建筑科学—结构工程]