摘要
为研究温度场作用下波形钢腹板组合桥梁的顶板横向应力,基于波形钢腹板箱梁桥的长期观测温度,建立波形钢腹板组合桥梁的温度梯度计算公式。建立波形钢腹板箱梁桥的空间精细化数值有限元模型,考虑波形钢腹板箱梁宽高比、顶板与腹板的横向抗弯刚度比及温度梯度中的最高温度参数,进行参数分析。研究结果表明:箱梁宽高比和横向抗弯刚度比与顶板横向正应力呈对数关系;温度梯度的最大温度与顶板横向正应力呈线性关系。考虑以上3个参数建立顶板横向正应力计算公式,基于最优化算法对拟合公式的参数标定,提出顶板横向正应力温度计算公式与拟合原始值的相关系数为0.997,该公式可对该类型桥梁的初步设计提供参考。
To explore the horizontal stress on the roof of the composite bridge with corrugated steel webs under temperature field, the temperature gradient calculation formula of the composite bridge with corrugated steel webs is established based on a long-term observation of the temperature of composite bridge with corrugated steel webs. A space refinement numerical finite element model of the composite bridge with corrugated steel webs is established. The aspect ratio of composite girder bridge with corrugated steel webs, the ratio between the transverse flexural stiffness of the roof and the web and the maximum temperature in the temperature gradient are considered in the parameter analysis. The results show that the aspect ratio of box girder and the ratio of the transverse flexural stiffness present a logarithmic relationship with the transverse normal stress of the roof, and the maximum temperature has a linear relation with the transverse normal stress on the roof. The calculation formula of the transverse normal stress is established considering the above three parameters. The optimization algorithms are used in the parameter calibration of the formula. The correlation coefficient of the transverse normal stress on the roof through calculation formula and the fitting is 0. 995. In this paper, the calculation formula can provide reference for the preliminary design of this type bridge.
出处
《山东交通学院学报》
CAS
2016年第4期58-63,共6页
Journal of Shandong Jiaotong University
关键词
桥梁工程
波形钢腹板
箱梁
温度
数值模拟
参数分析
bridge engineering
corrugated steel web
box girder
temperature
numerical simulation
parameter analysis
