大跨度连续刚构桥悬臂施工期间温度场实验及分析  

The Temperature Field Test and Analysis During the Cantilever Construction of the Long-span Continuous Rigid-frame Bridge

作　　者：张通[1] 欧进萍[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《公路工程》2008年第1期23-27,共5页Highway Engineering

基　　金：国家自然科学基金重点资助项目(50538020)

摘　　要：根据大型连续刚构桥悬臂施工期间的温度场实验结果,分析了典型箱梁断面全天的温度场特点及变化趋势。对实验数据进行了非线性回归,作者提出了该桥的温度梯度计算模式,并对其参数对时间进行了拟合,最终将时间和空间的4参数温度场问题简化为关于时间的1参数问题。该简化模式可对同等气象条件下的同类桥梁进行施工期间的温度组合应力验算。According to the all-day temperature field test result of typical section of the Dongying yellow river bridge, the character and changing tendency of the temperature field during cantilever construction. Basing on the nonlinear regression analysis of the test data,the author present the calculation mode of the temperature gradient. All the parameters are fitted by time and then the temperature field with 4 parameters about time and spatial is simplified to the 1 parameter mode about time. For the same kind of constructing bridge, this simplified mode can be used to the checking computation of temperature combination stress.

关 键 词：温度场实验 箱梁 连续刚构 温度梯度 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]