基于响应面法的桥梁抗船撞可靠度分析  

Reliability Analysis of Bridge Anti-ship Collision Based on Response Surface Method

作　　者：李晨溥 薛小强[1] 郭燕培 LI Chenpu;XUE Xiaoqiang;GUO Yanpei(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059)

机构地区：[1]成都理工大学环境与土木工程学院,成都610059

出　　处：《公路交通技术》2024年第5期86-95,共10页Technology of Highway and Transport

摘　　要：为解决桥梁抗船撞可靠度分析中影响因素选取的问题,基于响应面法建立包含船舶因素和桥梁因素的响应面函数来计算在不同响应面函数下的桥梁抗船撞可靠度,并对桥梁的墩顶位移和失效年限进行可靠度分析。研究结果表明:1)影响因素的灵敏度与桥梁抗船撞的安全性正相关,高灵敏度因素对可靠度的影响较大;2)多种影响因素的选取会导致试验繁琐,且低灵敏度的因素可能在分析中失效,而“中性”因素则显示出较好的适用性;3)选取15 mm的墩顶位移允许值来分析桥梁抗船撞可靠度和失效年限可靠度比较符合实际情况。In order to solve the problem of selecting the influencing factors in the reliability analysis of bridge anti-ship collision,a response surface method is utilized to establish a response surface function that includes both ship and bridge factors.This function is used to calculate the reliability of bridge an-ti ship collision under different response surfaces and to perform a reliability analysis of the bridge pier top displacement and failure age.The results show that:1) The sensitivity of the influential factors is positively related to the safety of the bridge anti-ship collision,and the high sensitivity factors have a greater effect on the reliability;2) The selection of multiple influencing factors will lead to cumbersome tests,and the low sensitivity factors may fail in the analysis,while the ‘neutral' factors show better applicability;3) Selecting a 15mm allowance for pier top displacement to analyze the bridge anti-ship collision reliability and failure year reliability is more in line with actual conditions.

关 键 词：桥梁 响应面法 抗船撞 墩顶位移 失效年限 可靠度分析 

分 类 号：U447[建筑科学—桥梁与隧道工程]