摘要
结合杭州江东大桥施工监控,根据实测资料,研究了钢箱梁温度场变化规律,给出了钢箱梁顶、底板温度梯度计算公式,分析了顶推过程中温度变化对末段梁标高或者转角的影响.结果表明,中国现行公路桥涵设计通用规范给出的钢梁截面的温度梯度模式,并不适应于无桥面铺装的情况.而且,中国现行的公路桥涵设计规范的温度梯度曲线是参照美国AASHTO规范而得,因日照、气候和气象等条件的不同,该曲线不完全切合中国的实际,需要适度修正.
Combined with the construction control of Jiangdong Bridge,based on the date measured in site,the variation regulation of the temperature field of the steel box girder was investigated,formula for calculating the temperature of the top and bottom plate was given,and how the temperatue transformation affects the elevation or the rotation angle of the last girder in incremental launching construction was analyzed.The results show that,the thermal gradient model of steel box girder which is given by our countr...
出处
《长沙交通学院学报》
2009年第1期39-44,共6页
Journal of Changsha Communications University
基金
国家自然科学基金资助项目(50778024)
关键词
钢箱梁
温度场
顶推
steel box girder
temperature field
incremental launching
