模块化钢框架模块间内套筒连接节点抗震性能及受力机理分析  

Seismic Performance and Stress Mechanism Analysis of Inner Sleeve Splicing Joints of Modular Steel Construction

作　　者：许晓潇 王燕[1] 安琦[1] Xiaoxiao Xu;Yan Wang;Qi An(School of Civil Engineering,Qingdao University of Technology,Qingdao 266500,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266500

出　　处：《钢结构(中英文)》2024年第12期49-60,共12页Steel Construction(Chinese & English)

基　　金：国家自然科学基金项目(52208175,52078258)

摘　　要：为研究模块化钢框架模块间内套筒连接节点的抗震性能和受力机理,基于内套筒连接节点抗震性能试验研究,建立了与试验节点试件相同尺寸和荷载工况的有限元分析模型,并验证了有限元模型的有效性。通过改变节点构造参数,研究了内套筒长度、内套筒高度以及柱内隔板对节点抗震性能影响;推导了考虑轴向压力作用下内套筒与柱壁之间的接触力计算公式,并与有限元计算结果对比验证,验证了接触力理论计算公式的有效性。研究结果表明:建立的有限元模型能够有效模拟内套筒连接节点的工作状态和极限承载力;内套筒连接节点具有较好的抗震性能,且通过合理构造可改善节点受力状态,促使梁端塑性铰外移实现节点的延性破坏;增加内套筒厚度和内套筒长度对节点承载能力影响不明显;设置内隔板可显著提升节点承载能力及耗能能力;钢管柱弯曲变形与内套筒产生的接触力使柱截面在原有荷载状态下的应力有所增大并产生局部应力集中现象,设计中应考虑其不利影响。In order to study the seismic performance and stress mechanism of inner sleeve splicing joints of modular steel construction,based on the experimental study on the seismic performance of the inner sleeve splicing joints,a finite element analysis model with the same size and load conditions as the test joint specimens was established,and the validity of the finite element model was verified.By changing the structural parameters of the joint,the influence of the length of the inner sleeve,the height of the inner sleeve,and the inner partition of the column on the seismic performance of the joint was studied.The calculation formula of the contact force between the inner sleeve and the column wall under the action of axial compression was derived,and compared with the finite element calculation results,the validity of the theoretical calculation formula of the contact force was proved.The results showed that the established finite element model could effectively simulate the working state and ultimate bearing capacity of the inner sleeve splicing joints.The inner sleeve splicing joints had good seismic performance,and the stress state of the joint could be improved by reasonable construction,which could promote the plastic hinge of the beam end to move outward to realize the ductile failure of the joint.Increasing the thickness of the inner sleeve and the length of the inner sleeve had no obvious effect on the bearing capacity of the joint.The setting of inner clapboard could significantly improve the bearing capacity and energy dissipation capacity of the joint.The contact force between the bending deformation of the steel tube column and the inner sleeve increased the stress of the column section under the original load state and produces local stress concentration,the adverse effects should be considered in the design.

关 键 词：模块化钢框架 模块间连接节点 内套筒 接触力 

分 类 号：TU391[建筑科学—结构工程] TU352.11