摘要
为保证大件运输车辆通行弯桥的安全性,提出了一种基于正、逆可靠度分析的抗倾覆稳定安全评估方法。首先,构建安全冗余、破坏两临界状态功能函数,提出相应目标可靠指标分析方法;其次,建立基于逆可靠度分析的抗倾覆稳定安全系数计算模型;最后,评估典型三跨连续弯桥的抗倾覆稳定安全性。结果表明:本文计算模型合理有效。当典型三跨连续弯桥设置一个单支承时满足抗倾覆安全要求但安全储备较低,建议优化支承形式或采取抗倾覆措施。
To ensure the safety of curved bridges when the customized transport vehicles(CTVs)pass,a safety assessment method for resistant overturning stability was proposed based on forward and inverse reliability analysis.Firstly,considering two limit states which corresponding to conditions that the bridge cannot satisfy the safety redundancy and overturning abrupt,two levels of safety assessment functions were constructed,and the corresponding target reliability index analysis methods of two levels were proposed.Secondly,based on the inverse reliability theory,a two-level resistant overturning stability safety factor calculation model was established.Finally,the stability and safety of the typical three-span continuous curved bridge against overturning was evaluated.The results indicate that the proposed calculation model is reasonable and effective.When a typical three-span continuous curved bridge is equipped with a single support,it meets the safety requirements for anti-overturning,but has low safety reserves.It is recommended to optimize the design of the support form or take anti overturning measures.
作者
郭雪莲
韩万水
王涛
周恺
张修石
张书颖
GUO Xue-lian;HAN Wan-shui;WANG Tao;ZHOU Kai;ZHANG Xiu-shi;ZHANG Shu-ying(Highway School,Chang'an University,Xi'an,710064,China;Zhejiang Institute of Communications Co.,Ltd.,Hangzhou 310030,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2024年第8期2229-2237,共9页
Journal of Jilin University:Engineering and Technology Edition
基金
国家重点研发计划项目(2021YFB1600300)
国家自然科学基金项目(518708058)
山东省交通运输厅科技计划项目(2021B51)
中央高校基本科研业务费专项资金—长安大学优秀博士学位论文培育项目(300102213707).
关键词
桥梁工程
弯桥
抗倾覆稳定安全评估
大件运输车辆
正、逆可靠度分析
bridge engineering
curved bridge
resistant overturning stability safety assessment
customized transport vehicles
reliability and inverse reliability analysis
