同济大学学报（自然科学版）2025，Vol.53Issue(6)：841-850,10.DOI:10.11908/j.issn.0253-374x.23384
负载下栓接加固偏心受压H形钢极限承载力
Ultimate Bearing Capacity of Eccentrically Compressed H-shaped Steel Reinforced with Bolts Under Load
摘要
Abstract
Strengthening of steel structures is usually carried out with loads on the original structure(i.e.,under preload).In order to clarify the influence of the preload level of the structure on the strengthening effect of steel members with bolted strengthening,168 finite element models of bi-directional eccentrically compressed H-shaped steel members with bolted strengthening are calculated and analyzed.Parameters affecting the strengthening effect are investigated,including the preload level,slenderness ratio and eccentricity.It is shown that,for the strengthening of eccentrically compressed members,the preload has an unfavorable effect on the strengthening effect,weakening the strengthening effect within 14%,the slenderness ratio also affects the strengthening effect,whereas the eccentricity has an insignificant effect on the strengthening effect.The proposed formula for predicting the strengthening effect by considering the slenderness ratio and the preload level can be used to calculate the ultimate bearing capacity of bi-directional eccentrically compressed H-shaped steel columns with bolted strengthening under preload.关键词
稳定性/初始负载/螺栓连接/钢结构加固/有限元模型Key words
stability/preload/bolt connection/strengthening of steel structure/finite element method分类
土木建筑引用本文复制引用
张国萱,王思哲,苏庆田..负载下栓接加固偏心受压H形钢极限承载力[J].同济大学学报（自然科学版）,2025,53(6):841-850,10.基金项目
国家自然科学基金(52278207) （52278207）
