非线性日照温度下连续刚构桥的温度应力分析  

Thermal Stress Analysis of Continuous Rigid Frame Bridge under Nonlinear Sunshine Temperature

作　　者：郭瑞军[1] 

机构地区：[1]山西省交通科学研究院,太原市030006

出　　处：《公路》2013年第12期67-73,共7页Highway

摘　　要：从温度应力的角度出发,简述了中国、美国及英国三个国家四种不同桥梁规范给定的非线性日照温度梯度曲线,并结合连续刚构桥实例,通过数值仿真手段对比分析了不同温度梯度曲线作用下结构截面的温度应力。研究结果表明,不同温度梯度曲线作用下截面的温度应力差异显著,在采用中国铁路桥梁设计规范及英国桥梁设计规范拟定的非线性温度梯度曲线进行连续刚构桥设计时,应着重关注非线性温度引起结构截面下缘应力的变化,有效避免因温差作用而引起的结构开裂,从而保证桥梁结构的受力安全。From the point of view of temperature sunshine temperature gradient curve has China, the United States and the United ed on four dif stress, the paper ferent bridge spec Kingdom. Then combined with briefly introduces the nonlinear ifications of the three countries. the continuous rigid frame bridge project, the comparative analysis of the structure-sectional temperature stress under the different temperature gradients is conducted by MIDAS software respectively. The results show that the temperature stress of the cross sections have significant difference l when the continuous rigid frame bridge design is in accordance with the non-linear temperature gradient prepared in Chinese railway bridge design specifications and the United Kingdom bridge design specifications, it should focus on the stress of the lower edge of the structure cross-section caused by the nonlinear temperature changes to effectively avoid the structure cracking in order to ensure the safety of the bridge structure.

关 键 词：非线性温度 连续刚构桥 温度应力 分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]