框支密肋复合墙结构墙梁抗震性能试验研究  

Experimental study on seismic performance of multi-ribbed composite wall-beam supported on frame

作　　者：夏雷[1] 丁永刚[2] 姚谦峰[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]河南工业大学土木建筑学院,河南郑州450001

出　　处：《建筑结构学报》2011年第10期146-152,共7页Journal of Building Structures

基　　金：国家自然科学基金项目(510780285;0878021);国家"十一五"科技支撑计划项目(2006BAJ04A02-05)

摘　　要：进行了4榀底部框架、上部密肋复合墙结构墙梁大比例模型的抗震性能试验,研究了墙梁在低周反复荷载作用下的破坏过程及特征、滞回及耗能特性、承载力、位移延性、刚度退化以及抗倒塌能力。试验结果分析表明:多层框支密肋复合墙结构墙梁以剪切型破坏为主,结构具有较高的承载能力、较大的延性和较好的抗倒塌能力;墙梁的组合作用效应显著,托梁支座斜截面受剪承载力为其主要控制因素;上部密肋复合墙体呈现"填充砌块-密肋框格-隐形框架"依次开裂的破坏特征,有利于保证结构的抗震安全性能;在洞口设置构造柱和过梁能够保证结构的承载力和刚度基本不变,但试件的延性会有所降低;密肋复合墙体的水平承载力和抗侧刚度较大,应注意合理控制结构上下刚度和承载力的分布,可通过在底层增设密肋复合墙或对密肋框格进行优化设计予以实现。Four large-scale models of multi-ribbed composite wall-beam supported on frame structure were tested.The failure process and patterns,bearing capacity,deformation and ductility,hysteretic characteristics,stiffness degradation and collapse-resistant capacity were analyzed in detail.The results show that the failure of multi-ribbed composite wall-beam is primarily due to shear,with high bearing capacity,great ductility and good collapse-resistant capacity.The combination effect of wall-beam is obvious.The main controlling factor of frame beam is the shear capacity of oblique section near the supports.The multi-ribbed composite wall appears to get cracked from infilling blocks to ribbed frame,and then to the outer concealed frame,which is beneficial to ensure the seismic safety of the structure.Columns and beams arranged near the hole can effectively keep the bearing capacity and stiffness constant,while the ductility of the specimen can be reduced.As the bearing capacity and lateral stiffness of multi-ribbed composite wall are relatively high,much more attention should be paid to the arrangement of the stiffness and bearing capacity in the structure,which can be properly resolved by adding multi-ribbed composite wall at the bottom or optimizing the constitution of the wall.

关 键 词：底部框架结构 密肋复合墙 墙梁 拟静力试验 抗震性能 

分 类 号：TU398.2[建筑科学—结构工程] TU317.1