装配式钢围檩螺栓开孔优化及抗弯性能分析  

Optimization of prefabricated steel enclosing purlin bolt openings and analysis of bending performance

作　　者：张新 范大为 郭培民 赵雷 ZHANG Xin;FAN Dawei;GUO Peimin;ZHAO Lei(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Road&Bridge Construction Group Co.,Ltd.,Jinan 250014,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]山东省公路桥梁建设集团有限公司,山东济南250014

出　　处：《山东建筑大学学报》2025年第1期13-21,31,共10页Journal of Shandong Jianzhu University

基　　金：山东省重点研发计划(重大科技创新工程)项目(2021CXGC011204)。

摘　　要：装配式钢围檩作为一种应用于基坑支护工程中的新型围护墙支撑构件,研究其螺栓开孔后的抗弯性能可为实际工程应用提供理论依据。文章基于不同螺栓孔布置方案下的装配式钢围檩主体单元模拟试件,利用有限元软件ANSYS对试件进行纯弯作用下的数值模拟,分析其抗弯承载力、抗弯刚度及螺栓残余预紧力,揭示不同组件的应力分布情况。结果表明:开孔试件方案中,螺栓开孔导致试件极限抗弯承载能力和弹性变形阶段的抗弯刚度分别下降了14%~23%、5%~19%,增大x向的螺栓孔间距、增加T形截面高度均可提高试件的抗弯承载力与抗弯刚度;连接板设置标准圆孔的试件,其抗弯承载力及抗弯刚度均强于相同参数下连接板设置长槽孔的试件。The prefabricated steel enclosing purlin,serving as a innovative support component,is utilized in foundation pit to support engineering.Investigating its bending performance after bolt opening can provide a theoretical basis for practical engineering applications.This paper conducts numerical simulations on the main unit of the prefabricated steel enclosing purlin under different bolt hole layout schemes by using ANSYS,focusing on pure bending conditions.The analysis examines the bending bearing capacity,bending stiffness,bolt residual preload,reveals the stress distribution across different configurations.The results show that:in the open specimen scheme,bolt openings result a reduction of 14%to 23%in the ultimate bending bearing capacity.Similarly,bolt openings cause a decrease in the bending stiffness of the specimen during the elastic deformation stage by 5%to 19%.Moreover,the bending capacity and stiffness of the specimen can be improved by increasing the spacing between the x-direction bolt holes and the height of the T-shaped section.Additionally,specimens with standard round holes in the connecting plate exhibit higher bearing capacity and better bending stiffness compared to those with elongated grooved holes under the same parameters.

关 键 词：装配式 钢围檩 螺栓连接 螺栓孔 数值模拟 

分 类 号：TU392.1[建筑科学—结构工程]