钢筋混凝土梁柱构件的地震损伤性能试验  

Experiment on Seismic Damage Behavior of Reinforced Concrete Beams and Columns

作　　者：蒋欢军[1] 白努特[1] 陈林之[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2011年第2期102-107,共6页Structural Engineers

基　　金：北京市科技计划重点项目(D09050600370000);国家自然科学基金资助项目(51078272;90815029)

摘　　要：钢筋混凝土框架结构的抗震性能主要取决于框架梁、柱的抗震性能。为提供钢筋混凝土框架结构基于性能的抗震设计依据,对钢筋混凝土梁、柱构件进行了低周反复荷载试验,研究了构件的地震损伤破坏过程和破坏程度,详细记录了构件各损伤阶段的裂缝宽度和破坏时混凝土保护层的剥落高度,对比研究了轴压比、剪跨比、配箍率和纵筋配筋率对构件延性、承载力和地震损伤的影响规律,同时对按抗震要求设计与不考虑抗震要求设计的构件进行了对比研究。试验研究表明,轴压比和剪跨比是影响构件抗震性能和地震损伤的主要因素。与抗震设计试件相比,非抗震设计试件表现出明显的剪切效应,延性显著降低,地震损伤更为严重,按抗震规范要求设置箍筋非常必要。The seismic performance of reinforced concrete frame structure is determined to a large extent by that of beams and columns.To provide the basis for performance-based seismic design of reinforced concrete frame structures,low-cycle reversed loading test was carried out on reinforced concrete columns and beams to study the seismic damage progress and damage states.The crack width corresponding to individual damage state and spalling height of concrete cover were recorded during the test.The influence of the main design parameters,axial compressive force ratio,shear span ratio,longitudinal steel ratio,and transverse steel ratio on ductility,the carrying capacity and seismic damage was investigated.And the behavior of the component designed without seismic requirement was compared with that designed with seismic requirement.Test results indicate that the axial load ratio and shear span ratio are the most important factors affecting the seismic performance as well as seismic damage.Compared with the members in line with the current seismic design code,members designed without seismic requirement have more prominent shear effect and lower ductility so that more severe seismic damage occurs.It is necessary to set the transverse steel bars in line with the current seismic design code.

关 键 词：钢筋混凝土结构 梁 柱 低周反复荷载试验 地震损伤 

分 类 号：TU375[建筑科学—结构工程] TU317