带不等高梁的外传力式矩形钢管柱框架节点抗震性能有限元分析  

Finite Element Analysis of Seismic Behavior of Force-Transforming Plates Outside Box Column Frame Joint with Different Beam Height

作　　者：徐忠根[1,2] 郭俊宇 邓长根[3] XU Zhonggen;GUO Junyu;DENG Changgen(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China;Guangdong Engineering Research Center ~or Complicated Steel Construction, Guangzhou University, Guangzhou 510006, China;College of Civil Engineering, Tongji University, Shanghai 200092, China)

机构地区：[1]广州大学土木工程学院,广州510006 [2]广州大学广东省复杂钢结构工程技术研究中心,广州510006 [3]同济大学土木工程学院,上海200092

出　　处：《建筑钢结构进展》2018年第3期33-41,57,共10页Progress in Steel Building Structures

基　　金：国家自然科学基金(51478330;51408142)

摘　　要：通过建立6个传统钢管柱框架中柱节点试件和9个外传力式框架中柱节点试件,应用ANSYS对其抗震性能进行非线性有限元分析。对比分析了相邻两梁梁高不等时,两种框架节点模型的破坏形态、滞回性能、承载力、骨架曲线、耗能能力等。分析结果表明:低周往复荷载作用下,外传力节点滞回曲线饱满,该节点等效黏滞阻尼系数随梁高差的增大而增大,随着梁长度减少而增大,随着外传力板宽度增加而增大,具有较强的耗能能力;另外,增设外传力件能使节点域应力得到改善,有效避免梁根部应力发展导致梁柱连接处焊缝过早地发生脆性破坏。Using the finite element analysis software ANSYS,models of nine steel frame middle joints transferring beam forces outside box columns and six ordinary joints with different beam height are built in order to study the seismic behavior. Two types of joints with two adjacent unequal beam heights are proposed by comparing the mechanical behavior of the joints, such as failure mechanism, hysteretie curve, ultimate load capacity, skeleton curve, energy dissipation factor, etc. It shows that under the condition of low cyclic loading, the hysteretic curve of new joints is full. The equivalent viscous damping coefficient of the new joints increases with the increase of beam height difference, decreases with increase of the beam length, and increased with increase of the width of force transforming element, which has strong energy dissipation capacity. In a certain range,the analytical results indicate that the stresses of joints are reduced by adding transfer plates,and therefore the premature brittle fracture near butt weld due to high stresses can be avoided.

关 键 词：梁柱节点 传力件 滞回性能 耗能系数 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程]