期刊导航

论文摘要

基于有限元的波纹钢腹板组合箱梁疲劳损伤分析

Fatigue Performance of Box Girders with Corrugated Steel Web Based on Finite Element Simulation Results

作者:袁书成(四川大学建筑与环境学院);董江峰(四川大学建筑与环境学院);王清远(四川大学破坏力学与工程防灾减灾四川省重点实验室);彭泽维(成都市建筑设计研究院)

Author:Yuan Shu-Cheng();();Wang Qing-yuan(Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, Sichuan Univ.);()

收稿日期:2016-03-20          年卷(期)页码:2016,48(6):77-82

期刊名称:工程科学与技术

Journal Name:Advanced Engineering Sciences

关键字:箱梁;破坏机理;疲劳寿命;疲劳损伤因子

Key words:box girders; failure mechanism; fatigue life; fatigue damage factors

基金项目:国家自然科学基金(51408382),四川省科技计划项目(2015JPT0001)

中文摘要

针对波纹钢腹板组合箱梁(以下简称箱梁)的抗弯性能进行有限元分析,分析箱梁的静力位移、应力和应变结果,建立箱梁破坏损伤机理并得到应力薄弱点。同时,根据有限元分析结果,进行箱梁局部应力应变分析,得到箱梁不同水平下的疲劳寿命。最后,结合疲劳损伤和疲劳断裂理论进行箱梁的疲劳裂纹扩展行为及破坏过程和寿命预测研究,分析了正弦波疲劳荷载作用下箱梁中的钢腹板、PBL剪力连接件以及钢板翼缘等部件的疲劳裂纹萌生及寿命预测结果与试验结果吻合较好。研究表明:根据美国规范AASHTO2004中C类标准进行工程设计和疲劳寿命估算与试验符合较好,同时采用Palmgren-Miner线性累积损伤疲劳准则能有效地计算变幅疲劳载荷下箱梁的疲劳损伤及断裂破坏过程,为实际工程中箱梁疲劳性能设计提供参考。

英文摘要

This paper presents a finite element analysis on flexural behaviors of box girders with corrugated steel web (hereafter called box girders). Displacement, stress and strain under static load is used to confirm the failure mechanism and stress weak spots. Meanwhile, fatigue life of box girders in different conditions is predicted by analyzing local stress and strain action, which is acquired by finite element analysis. Based on the fatigue damage and fatigue fracture theory, the predicted results of cracks initiation location and fatigue life are approximately agree with the experimental. Results show that the standard C of America code AASHTO2004 is suitable for designing the fatigue life of box girders, What is more, the Palmgren-Miner learner accumulated damage criterion can be an efficient method to analysis the fatigue damage process, which provides a reference for box girders fatigue design in practical engineering.

关闭

Copyright © 2020四川大学期刊社 版权所有.

地址:成都市一环路南一段24号

邮编:610065