外包式柱脚传力机理及内力分布研究  

Research on the force transmission mechanism and internal force distribution of the encased column base

作　　者：徐艳秋[1] 刘洪雨 Xu Yanqiu;Liu Hongyu(School Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Economic and Technological Research Institute of State Grid Jibei Electric Power Co.,Ltd.,Beijing 100038,China)

机构地区：[1]北京交通大学土建学院,北京100044 [2]国网冀北电力有限公司经济技术研究院,北京100038

出　　处：《山西建筑》2024年第15期41-44,共4页Shanxi Architecture

基　　金：国网冀北经研院2023—2024年基于变电站模块化装配式条形基础研究技术服务项目。

摘　　要：为探究外包式柱脚的传力机理及内力分布状况,基于塑性损伤理论建立了外包式柱脚有限元仿真模型。通过模拟数据分析了钢柱在加载过程中各截面内力变化,研究了钢柱与外包层之间的相互作用机制及内力传递机理;对有、无栓钉外包式柱脚的内力分布进行了对比,研究了栓钉在内力传递过程中的作用及影响。研究结果表明,内力通过钢柱与外包层之间界面的接触应力及栓钉的作用力进行传递,在柱脚底部截面钢柱已将大部分内力传递给外包层;栓钉在内力传递过程中发挥了积极的作用,促进了钢柱将内力传递给外包层;布置栓钉有利于减轻钢柱底板下面混凝土的局部承压,改善锚栓的受力状况。To explore the force transmission mechanism and internal force distribution of the encased column base,a finite element simulation model of plastic damage of the encased column base was established.The internal force changes of each section of the column during the loading process were analyzed by simulation data,and the interaction mechanism between the column and the encased layer and the internal force transmission mechanism was studied.The internal force distribution of the studs with and without studs was compared,and the role and influence of the studs in the process of internal force transmission were studied.The results show that the internal force is transmitted through the contact stress at the interface between the column and the encased layer and the force of the bolts,and most of the internal force is transmitted to the encased layer by the column at the bottom section of the column base.The studs play an active role in the process of internal force transmission,which promotes the column to transmit the internal force to the encased layer.The arrangement of bolts is conducive to reducing the local pressure of the concrete under the column bottom plate and improving the stress condition of the anchor bolts.

关 键 词：外包式柱脚 塑性 损伤 传力机理 有限元 内力 栓钉 

分 类 号：TU323.1[建筑科学—结构工程]