集装箱装配建筑减震结构及连接节点抗震性能分析研究

RESEARCH ON SEISMIC BEHAVIOR ANALYSIS OF SHOCK ABSORBING STRUCTURE AND CONNECTING JOINTS OF CONTAINER ASSEMBLY STRUCTURES

模块化集装箱装配式建筑近年来得到了快速的发展,箱体之间的连接方式是保证集装箱建筑整体性及承载能力的关键问题。基于现有的集装箱建筑连接节点形式及减、隔震技术特点,提出了一种集装箱装配式建筑减震连接节点。采用ABAQUS有限元分析软件,共建立4个6 m(20 ft)和12 m(40 ft)类型箱体的单箱两层的集装箱建筑模型,节点采用常规连接件和减震连接件两种连接形式。对建立的模型进行单调水平加载和低周往复加载下的数值仿真分析,对不同连接形式整体结构及连接节点的受力性能进行了分析。分析结果表明:减震节点可以使结构的滞回曲线更加饱满,结构构件的应力下降,屈服面积减小;结构屈服后强度退化降低,保证结构在地震下具有较好的水平抗侧承载力及滞回耗能能力,提高结构抗震性能;避免连接节点出现应力集中现象,确保连接件和角件不发生破坏,保证连接节点的可靠性。

Container assembly structures have developed rapidly in recent years, and the connection between the containers is a key issue to ensure the integrity of the structure. Based on the existing container building connection form and seismic mitigation and isolation techniques, a container-assembled building damping connection was proposed. Through the ABAQUS finite element analysis software, a total of four single-box two-story container building models of 6 m and 12 m type tanks were built. The joints were connected by conventional joints and shock-absorbing joints. The numerical simulation analysis of the established model under monotonic horizontal loading and quasi-static loading was carried out, and the overall structure of the different connection forms and the mechanical performance of the joints were analyzed. The analysis results showed that the damping joint could make the hysteresis curve of the structure more full, the stress of the structural members decreased, the yield area decreased;the strength degradation after the structure yields decreased, and the structure had better horizontal bearing capacity under earthquake. The hysteretic energy consumption could improve the seismic behavior of the structure;stress concentration at the connecting joints should be avoided in order to ensure that the joints and corner fittings were not damaged, and ensure the reliability of the connection joints.