不同规范温度梯度模式对钢管混凝土拱桥温度效应的影响  

Effect of Different Temperature Gradient Patterns on the Temperature Effect of Steel Pipe Concrete Arch Bridge

作　　者：安海平 AN Hai-ping(China Railway Sixth Group Hohhot Railway Construction Co.,Ltd.)

机构地区：[1]中铁六局呼和浩特铁路建设有限公司

出　　处：《中国标准化》2022年第23期145-150,共6页China Standardization

摘　　要：为分析竖向温度梯度模式对钢管混凝土拱桥温度效应的影响程度,结合《公路钢管混凝土拱桥设计规范》《公路钢管混凝土桥梁设计与施工指南》和部分研究成果,总结了4种关于钢管混凝土桥梁的温度梯度模式,从梯度模式的曲线形式和温度基数取值探讨了各模式的差异,并以一座钢管混凝土拱桥为研究对象,探究了各模式梯度温度对拱桥效应计算结果的影响。结果表明:由于测试环境及试验影响因素等原因,不同的CFST温度梯度模式在梯度曲线形式和温度基数取值方面存在较大差异。不同温度梯度模式作用对拱桥温度效应的影响相差较大,《公路钢管混凝土拱桥设计规范》中推荐的钢管混凝土拱桥温度梯度模式对于结构的设计偏于不安全。In order to analyze the infl uence of vertical temperature gradient modes on the temperature effect of steel pipe concrete arch bridges,four temperature gradient modes on steel pipe concrete bridges in existing studies are summarized,and the differences of each mode are discussed in terms of the curve form of gradient modes and temperature base values,and the infl uence of each mode gradient temperature on the calculation results of the arch effect is investigated with a steel pipe concrete arch bridge as the research object.The results show that due to the test environment and test infl uencing factors,different CFST temperature gradient modes have large differences in the form of gradient curve and the value of temperature base.The effect of different temperature gradient mode action on the temperature effect of the arch bridge is great,and the temperature gradient mode of steel pipe concrete arch bridge in the Design Specifi cation for Highway Steel Pipe Concrete Arch Bridge is unsafe for the design of the structure.

关 键 词：钢管混凝土拱桥 温度梯度 温度效应 曲线形式 温度基数 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]