边框架弱轴加腋连接抗震性能研究  

Study on seismic behavior of haunch reinforced weak-axis connections in fringe frame

作　　者：徐莹璐 卢林枫[1] 于颢杰 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]西安市浐灞生态房地产开发有限公司,陕西西安710024

出　　处：《地震工程与工程振动》2016年第5期191-199,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51278061)~~

摘　　要：本文提出了一种新型的节点域箱形加强式工字形柱弱轴连接形式,并基于此节点形式设计边框架节点足尺标准试件和加腋试件进行单调荷载试验研究。采用有限元软件ABAQUS对两种节点在单调荷载作用下的受力性能进行模拟对比验证后,对两种节点进行低周反复荷载作用下的有限元模拟分析。研究结果表明:在荷载作用下2种节点均能在梁上形成塑性铰,节点域和工字形柱基本处于弹性状态,说明新型弱轴连接能较好地符合"强柱弱梁"、"强节点弱构件"的抗震设计理念,并具有"强节点域"的特点;采用梁端加腋方式能够增大节点的转动刚度进而提高节点的承载能力,但是其延性较标准试件略有降低;标准试件和加腋试件的塑性转动能力均能达到0.03 rad;加腋试件梁上塑性铰在加强区外侧形成,其梁端上下翼缘焊缝处的应力明显小于标准试件。This paper puts forward a new box strengthened joint region connection for weak axis of I-section col-umn. Two full-scale tests of frame exterior joints with or without haunch reinforced connections under monotonicloading were conducted based on the proposed connection. A general finite element software ABAQUS was used tosimulate the mechanical behavior of the connections under monotonicgood agreement with the experiments. Simulation analysis under cyclicloadingloading, and the simulation results were inwas employed and the analysis indi-cated that： the plastic hinges located at the beam section, with panel zone and I-section column still being in elasticstate, which accords with the seismic design principles of ＂strong column and weak beam＂, ＂strong joint and weakmember＂, and has the characteristic of ＂strong pane zone＂ ; the haunch reinforced joint specimen could significant-ly improve the rotation rigidity and the bearing capacity, but its ductility is slightly reduced as compared to unrein-forced specimen ; the maximum plastic rotations are bigger than 0.03 rad ; the plastic hinges form outside the rein-forced region in haunch reinforced joint specimen, thus the stress of top and bottom flange welds in the beam end isevidently less than that of the unreinforced specimen.

关 键 词：边框架 弱轴连接 加腋 抗震性能 试验研究 有限元 

分 类 号：TU391[建筑科学—结构工程]