摘要
为研究钢框架内填预制再生混凝土墙结构的抗震性能,对3榀单层单跨1∶3缩尺的模型试件进行了拟静力试验。通过对钢框架是否设置预制墙板及不同梁柱节点连接形式的对比,深入分析了钢框架内填预制再生混凝土墙结构的破坏形态、传力机理、承载力、延性及耗能能力等指标。结果表明:设置预制再生混凝土墙板后,结构的承载力和抗侧刚度明显提高,与纯框架相比,极限承载力提高1.44倍,抗侧刚度提高了3倍;结构位移延性系数在2.81~2.86,预制墙板的设置略微降低了结构的延性;当层间位移角为1/50时,结构承载力退化系数仍大于0.90,表明该结构具有较高的安全储备;两种梁柱连接节点下峰值荷载仅相差4%,说明梁柱节点刚度对结构承载力的影响很小;从破坏形态看,两试件均在预埋件与墙板连接处形成水平贯通裂缝,发生剪切破坏,设计中预埋件的连接构造应引起足够重视。
In order to study the seismic behavior of steel frames in-filled with prefabricated recycled concrete wall, three 1/3 scaled one-bay, one-story specimens were tested with low cyclic load. The behaviors of steel frames with or without the prefabricated wall and with different form of beam-column joints were compared, and the failure mode, transfer mechanism, bearing capacity, ductility and energy dissipation of steel frames were analyzed. The results show that: the bearing capacity and lateral stiffness are improved apparently because of the setting of the prefabricated wall. Compared with the bare steel frame, the ultimate bearing capacity of the specimen is improved by 1.44 times and the lateral stiffness is improved by 3 times. The displacement ductility factor of the specimen is between 2.81-2.86, and the ductility is slightly reduced because of the setting of the prefabricated wall. The beating capacity degradation coefficient is still greater than 0.90 when the inter-layer displacement angle is 1/50, which indicates that the specimen has a higher safety level. The peak load of the specimen with two kinds of connection forms differs only 4%, which indicates that the beam-column joint connection stiffness has little effect on the bearing capacity of the structure. The failure mode of two specimens is the forming of horizontal crack in connection between the embedded part and the wall, implying shear failure,which indicates that more attention should be paid to the connection of the embedded part in the design.
出处
《工程力学》
EI
CSCD
北大核心
2018年第1期172-181,共10页
Engineering Mechanics
基金
国家自然科学基金项目(51308454)
中国博士后科学基金项目(2013M542371)
陕西省博士后自然科学基金项目
陕西省住建厅建设科技专项项目(2014-K12)
西安市城乡建设科技项目(SJW2014023)
关键词
钢框架
预制墙板
装配式结构
再生混凝土
抗震性能
steel frames
prefabricated wall
fabricated structure
recycled concrete
seismic behavior