基于修正的影响矩阵法的钢管混凝土拱桥施工阶段合理扣索索力计算  

Calculation of Reasonable Cable Buckle Force during Construction Stage of CFST Arch Bridge Based on Modified Influence Matrix Method

作　　者：王发正 张馨 谢皓宇 WANG Fazheng;ZHANG Xin;XIE Haoyu(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;Chongqing Urban Construction Senior Technical School,Chongqing 402247)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]重庆市城市建设高级技工学校,重庆402247

出　　处：《公路交通技术》2024年第6期72-80,89,共10页Technology of Highway and Transport

基　　金：国家自然科学基金重点项目(12032008);重庆市自然科学基金项目(CSTB2023NSCQ-MSX0775)。

摘　　要：为计算钢管混凝土拱桥拱肋安装阶段的扣索索力,以一座上承式钢管混凝土拱桥为例,采用修正前后的影响矩阵法对该桥施工阶段的扣索索力进行了分析。结果表明:1)未修正的影响矩阵法扣索索力计算过程中,易出现切线拼装的积累位移在最后一个节段时方能调整的情况,致使最后一根扣索索力易出现突变,索力值急剧增大;2)修正后的影响矩阵法计算的位移不仅满足工程要求,且迭代速率快,精度高,还能显著提高索力计算效率,该结果可供钢管混凝土拱桥施工阶段的索力计算参考。In order to calculate the buckle cable forces during the installation stage of the arch ribs of a CFST arch bridge,a top-bearing concrete-filled steel tube arch bridge was used as the basis and the modified influence matrix method was used to analyze the buckle cable forces during the construction stage of the bridge.The results show that:1)During the calculation of the cable force of the uncorrected influence matrix method,it is easy to occur that the accumulated displacement of the tangent assembly can only be adjusted by the last segment,which causes the last cable to be prone to mutation and the cable force value to increase sharply;2)The modified influence matrix method not only meets the accuracy requirements,but also has a fast iteration rate and higher accuracy,which significantly improves the cable force calculation efficiency.This result can provide reference for cable force calculation during construction of CFST arch bridge.

关 键 词：钢管混凝土拱桥 扣索索力 影响矩阵法 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]