单索面斜拉桥宽幅锚固横梁简化计算方法研究  

Study on Simplifi ed calculation Method of wide anchorage beam of single cable plane cable-stayed Bridge

作　　者：徐伟伟 XU Weiwei(China Railway SIYUAN Survey and Design Group Co.,Ltd Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司桥梁院,武汉430063

出　　处：《铁道勘测与设计》2023年第2期21-25,51,共6页Railway Survey and Design

摘　　要：为研究单索面斜拉桥宽幅锚固横梁的简化计算方法,以某斜拉桥为工程背景,借助midas/civil建立简化模型,采用简支悬臂、连续梁两种典型简化约束体系进行计算,并将计算应力与实体节段模型计算应力进行对比。结果表明,多箱室截面主梁腹板对锚固横梁计算应力影响较大,锚固横梁的简化计算不可忽略腹板的约束作用;对主跨锚固横梁,不应单独选取两种典型简化模型之一计算分析;边跨锚固横梁连续梁简化模型跨中计算应力与精确值的差值在0.05MPa以内,对边跨锚固横梁,采用连续梁简化模型可得到较为准确的结果;通过计入腹板约束作用,对主跨锚固横梁简化模型进行优化,可得到相对精确的计算结果。In order to study the simplified calculation method of wide anchorage beam of a cable-stayed bridge with single cable plane,a simplified model was established with the help of midas/civil,and two typical simplified constraint systems of simply supported cantilever and continuous beam were used for calculation,and the calculated stress was compared with that of solid segment model.The results show that the web of multi-chamber section has a great influence on the stress calculation,and the constraint effect of web cannot be ignored in the simplified calculation of anchorage beam.The calculated stress difference between the two typical simplified models of the main span anchorage beam and the exact value is more than 0.2MPa.For the main span anchorage beam,one of the two typical simplified models should not be selected separately for calculation and analysis.The difference between the calculated stress and the exact value is less than 0.05MPa in the simplified model span of the continuous beam with side span anchorage beam.For the continuous beam with side span anchorage beam,the simplified model can get more accurate results.By taking the web constraint into account,the simplified model of main span anchorage beam is optimized,and relatively accurate calculation results can be obtained.

关 键 词：单索面 锚固横梁 竖向刚度 简化计算 斜拉桥 

分 类 号：U44[建筑科学—桥梁与隧道工程]