装配式钢支撑千斤顶嵌入节点弱轴承载性能研究  

Study on the Load-bearing Performance of Jack Embedded Joint in Weak Axis for Assembled Steel Strut

作　　者：陈杨杰 贾冬云[1] 蒋育红[1] 王鸿宇 陈祥勇[3] 杨辉 Chen Yangjie;Jia Dongyun;Jang Yuhong;Wang Hongyu;Chen Xiangyong;Yang Hui(Anhui University of Technology,Ma'anshan Anhui,243002,China;Ma'anshan University,Ma'anshan Anhui,243100,China;MCC HUATIAN Engineering&Technology Co.Ltd.,Ma'anshan Anhui,243000,China;Boraid Design GroupCo.,Ltd.,Ma'anshan Anhui,243002,China)

机构地区：[1]安徽工业大学,安徽马鞍山243002 [2]马鞍山学院,安徽马鞍山243002 [3]中冶华天工程技术有限公司,安徽马鞍山243000 [4]搏锐设计集团有限公司,安徽马鞍山243002

出　　处：《安徽冶金科技职业学院学报》2024年第4期24-26,共3页Journal of Anhui Vocational College of Metallurgy and Technology

基　　金：《复杂结构关键技术研究及安全施工方法研发》(课题编号:RH2300002601);《装配式钢结构的标准化节点和构件研发及其在深基坑支护体系动态调整设计中的应用》,2023年安徽省住房城乡建设科学技术计划项目(课题编号:2023-YF063);《基于新型标准化装配式支撑体系的深基坑智能监测系统及动态设计软件研发》,2022年安徽省住房城乡建设科学技术计划项目(课题编号:2022-YF090)。

摘　　要：针对装配式钢支撑中千斤顶嵌入节点的弱轴承载性能低造成基坑支撑结构失稳的问题,开展该支撑和节点承载性能足尺模型试验。依据标准构件循环利用原则和弹性阶段变形限值,利用节点弯矩-转角曲线确定其弱轴初始转动刚度的试验值。利用有限元建立试件和节点的实体单元模型,对比有限元计算结果与试验数据,验证有限元模拟分析的可靠性和初始转动刚度计算值的准确性。所得节点初始转动刚度计算方法可为装配式型钢支撑结构的直接分析提供节点弹簧转动刚度,针对实体单元模型计算复杂问题,提出优化方案。To address the issue of instability in foundation pit support structures caused by the low weak-axis bearing capacity of jacking nodes in assembled steel struts,a full-scale model test of the bearing performance of the support and nodes was conducted.Based on the principle of standard component recycling and the deformation limit in the elastic stage,the initial rotational stiffness of the weak axis was determined using the moment-rotation curve of the nodes.A solid ele ment model of the specimen and nodes was established using finite element analysis,and the reliability of the finite element simulation analysis and the accuracy of the initial rotational stiffness calculation value were verified by comparing the simula tion results with the experimental data.The obtained method for calculating the initial rotational stiffness of the nodes can provide the nodal spring rotational stiffness for the direct analysis of assembled steel support structures,thereby solving the problem of high computational cost associated with solid element models.

关 键 词：装配式钢支撑 足尺模型试验 千斤顶嵌入节点 初始转动刚度 

分 类 号：TU3[建筑科学—结构工程]