|
|||||
|
|
| 连续箱梁的日照温差应力计算研究 | |
| 引用本文： | 陈权,王丽娟,张元海,诸昌钤.连续箱梁的日照温差应力计算研究[J].公路交通科技,2009,26(8). |
| 作者姓名： | 陈权 王丽娟 张元海 诸昌钤 |
| 作者单位： | 1. 西南交通大学信息科学与技术学院,四川,成都,610031;兰州交通大学土木工程学院,甘肃,兰州,730070 2. 兰州交通大学土木工程学院,甘肃,兰州,730070 3. 西南交通大学信息科学与技术学院,四川,成都,610031 |
| 摘 要： | 根据变形协调条件及平截面假定,首先推导了连续箱梁日照温差总应力的一般公式,并针对试验观测资料及我国铁路桥梁和公路桥梁设计规范中的不同日照温差梯度模式,给出了温度应力的实用计算公式.为了能够进一步应用于斜交连续箱梁,以斜交连续梁的三力矩方程为基础,给出了温度次弯矩的计算方法及公式.编制了相应温度应力分析程序,结合工程实例分别对正交和斜交连续箱梁的温度应力进行了计算分析,并与ANSYS有限元计算结果进行对比.通过分析连续箱梁日照温差应力沿梁跨方向的分布规律,提出在设计预应力混凝土连续箱梁桥时,应特别注意对主跨跨中截面进行正应力验算及正截面抗裂性验算,并注意对中支点及其附近梁段靠近重心轴处的斜截面抗裂性进行验.. |
| 关 键 词： | 桥梁工程 箱梁 有限元法 温度应力 非线性温度梯度 |
Study on Calculation of Sunshine Thermal Stress in Continuous Box-girders |
|
| CHEN Quan,WANG Lijuan,ZHANG Yuanhai,ZHU Changqian.Study on Calculation of Sunshine Thermal Stress in Continuous Box-girders[J].Journal of Highway and Transportation Research and Development,2009,26(8). | |
| Authors: | CHEN Quan WANG Lijuan ZHANG Yuanhai ZHU Changqian |
| Institution: | 1.School of Information Science and Technology;Southwest Jiaotong University;Chengdu Sichuan 610031;China;2.School of Civil Engineering;Lanzhou Jiaotong University;Lanzhou Gansu 730070;China |
| Abstract: | According to the harmonious condition of deformation and the assumption of plane section,the general formula for calculating sunshine thermal stress of continuous box girders was derived.Then based on the existing experimental results and the modes of sunshine thermal gradients in the present code for design of railway and highway bridges,the practical calculating formula of thermal stress was presented.The method and formula for calculating secondary thermal bending moment were provided to analyze skew con... |
| Keywords: | bridge engineering box girder finite element method thermal stress nonlinear thermal gradient |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |