摘要
收集整理了国内外桥梁设计规范的混凝土桥梁截面竖向温度梯度模式,通过具体算例对这些模式的温度效应进行了比较,并采用有限元方法对该算例的温度效应进行了时程分析。分析结果表明:不同温度梯度模式下的应力分布具有一定相似性,温度基数的取值对温度作用效应有较大影响,对于温度应力及温度挠度的计算是否可采用同一梯度模式,值得进一步研究。
Vertical temperature gradients at cross sections of concrete bridges in bridge design codes of different countries were reviewed. Thermal effects under these models were compared through a specific example, and the temperature time-history analysis for this example was performed by the finite element method. Results show that there is a certain similarity between thermal stress distributions under different models, and the value of basis for temperature gradients has a great impact on thermal effects, further research needs to be performed to determine whether the same temperature gradient model can be used for the calculation of both the thermal stress and the deflection.
出处
《结构工程师》
2010年第1期37-43,共7页
Structural Engineers
关键词
竖向温度梯度
温度效应
温度应力
温度挠度
混凝土桥梁
vertical temperature gradient, thermal effect, thermal stress, thermal deflection, concrete bridge
