基于疲劳试验的组合梁疲劳破坏形态的判别  

Identification of Fatigue Failure Modes of Composite Beams Based on Fatigue Test

作　　者：袁西贵 YUAN Xigui(School of Urban Construction of Chengdu Polytechnic,Chengdu 610218,China)

机构地区：[1]成都职业技术学院城建学院,成都610218

出　　处：《工业建筑》2022年第8期147-151,共5页Industrial Construction

基　　金：四川省教育厅2017年度科研计划自然科学类重点项目(17ZA0140);高层次人才科技支撑计划项目(成职院[2022]124号:22CZYG019)。

摘　　要：为推广钢-混凝土组合梁在桥梁结构和吊车梁中的应用,组合梁疲劳问题引起了人们的重视,但尚未有文献给出组合梁疲劳破坏形态的判别依据。在国内外疲劳试验主要成果和分析推理基础上,定义了界限应力幅指标作为组合梁疲劳破坏形态的判别依据。同时设计了不同剪力连接和不同钢梁构造细节的组合梁疲劳试验,结合钢结构设计标准中的钢梁构造细节有关参数,得到了基于不同钢梁构造细节的组合梁疲劳破坏形态的具体判别标准。将其用于13根不同剪力连接程度的试验梁的疲劳破坏形态验证,结果表明,应力幅指标用于判断疲劳破坏形态是可行的。In order to promote the application of steel-concrete composite beam in bridge structures and crane beams, the fatigue performance of composite beams has attracted researchers’ attention. However, the basis for judging the fatigue failure mode of composite beams has not given. In the paper, stress amplitude index was defined based on the main experimental results and reasoning at home and abroad, which was the basis for judging the fatigue failure mode of composite beams. The fatigue tests of composite beams with different shear connection degrees and different details of steel beams were carried out so that the specific criteria for fatigue failure modes was obtained combined with the related parameters of steel beam details given by Standard for Design of Steel Structures(GB 50017-2017). It verified the fatigue failure modes of 13 test beams with different shear connection degrees. The results showed that it was feasible to judge the fatigue failure mode by stress amplitude index.

关 键 词：组合梁 应力幅指标 剪力连接程度 破坏形态 

分 类 号：TU398.9[建筑科学—结构工程] U441[建筑科学—桥梁与隧道工程]