新型RC网格式框架结构墙体试验研究  

Test Research on the Wall of New Type RC Grid Frame Structure

作　　者：卢亚琴[1,2] 胡岚[1] 马克俭[1,2] 张华刚[2] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]贵州大学空间结构研究中心,贵州贵阳550003

出　　处：《湖南大学学报（自然科学版）》2013年第4期8-14,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51168008)

摘　　要：为研究新型RC网格式框架结构承载力、滞回曲线、骨架曲线、延性、刚度和耗能能力等受力性能,进行了3榀1/5缩尺墙体模型在低周反复水平荷载作用下的试验.试验结果表明:新型RC网格式框架结构表现出框架结构的受力特性,试件各层均出现反弯点,为剪切型破坏;滞回曲线饱满,有较强的耗能能力;延性比常规框架好;试件屈服后,刚度退化较快,临近破坏时,刚度退化缓慢.考虑材料、几何和接触非线性,运用有限元软件AN-SYS对相同条件下填充磷石膏的网格式框架结构墙体进行计算,有限元计算屈服时墙体顶点最大水平位移比试验大约5.8%,与试验结果吻合较好.新型RC网格式框架结构是介于框架结构和密肋网格式剪力墙结构受力性能之间的一种结构形式,适用于建造高层住宅及办公建筑等.Three 1/5 scale models of walls were tested to study the mechanical behavior of a new type RC grid frame structure under cyclic loads,which includes bearing capacity,hysteretic loops,skeleton curves,ductility,stiffness and energy dissipation capacity.The test results have shown that the new type RC grid frame structure demonstrates the characteristics of the frame structures,and the inflecture points occur on each floor,belonging to shear-type failure;it has full hysteretic curve and strong energy dissipation capacity,and better ductility than the conventional frame structures.The stiffness reduces fast after the specimens yield,but slowly by before the specimens are destroyed.Considering the nonlinear material,geometry and contact,and calculating the grid frame structure with cast-phosphogypsum as infilled walls by using the finite element software ANSYS under the same condition,the max horizontal displacement is larger than the test results by about 5.8%,which agrees well with the test results.The mechanical behavior of RC grid frame structure with cast-phosphogypsum as infilled walls is between the frame structure and the shear wall.The structure is suitable for the construction of high-rise residential and office buildings.

关 键 词：低周反复荷载 网格式框架结构 模型试验 磷石膏 抗侧刚度 

分 类 号：TU375[建筑科学—结构工程] TU317.1