天津地区悬臂浇筑混凝土箱梁施工期温度场及温度效应研究

发布时间：2018-05-01 17:00

本文选题：混凝土箱梁 + 温度场　；参考：《北京交通大学》2014年硕士论文

【摘要】：摘要：温度作用是桥梁设计和施工中需要考虑的一种重要荷载,其产生的温度位移和温度应力对桥梁的安全和施工质量有重要影响。温度作用有很强的地域性,本论文对天津地区施工期混凝土箱梁的温度场和温度效应进行了试验和计算分析,主要内容包括： (1)对一座混凝土箱梁的温度场进行了夏、秋、冬三个季节的现场实测。 (2)根据实测温度场的数据,分析了箱梁温度及温度梯度在不同季节的变化规律及翼缘板遮蔽作用。 (3)提出了适用于天津地区混凝土箱梁截面竖向和腹板横向的温度梯度建议公式。 (4)利用有限元分析软件MIDAS/CIVIL模拟计算了不同温度梯度在桥梁不同施工阶段产生的温度效应。 (5)提出了温度作用对悬臂浇筑箱梁线形控制的建议措施。
[Abstract]:Abstract: temperature is an important load to be considered in the design and construction of bridges. The temperature displacement and thermal stress produced by it have an important impact on the safety and construction quality of bridges. The temperature field and temperature effect of concrete box girder during construction in Tianjin are tested and calculated in this paper. The main contents are as follows: The temperature field of a concrete box girder is measured in summer, autumn and winter. 2) based on the measured temperature field data, the variation of box girder temperature and temperature gradient in different seasons and the shielding effect of flange plate are analyzed. A formula of temperature gradient for vertical and web sections of concrete box girder in Tianjin area is proposed. 4) using finite element analysis software MIDAS/CIVIL, the temperature effects of different temperature gradients in different construction stages of bridges are simulated and calculated. The suggestion of temperature effect on the linear control of cantilever cast box girder is put forward.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.5;U445.4

【参考文献】