连续T构箱梁桥竖向的升温模式  

Vertical Warming Pattern for Continuous T-Girder Bridge

作　　者：于天来[1] 王亮[1] 张健[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2009年第6期59-61,共3页Journal of Northeast Forestry University

摘　　要：以黑龙江省三股线高架桥的实测温度数据为依据,对竖向温度梯度的变化规律进行了研究,得出了该桥的竖向升温模式;并对该升温模式、铁路桥规和公路桥规规定的竖向升温模式产生的温度自应力及外约束应力进行了计算与对比分析。结果表明,箱梁竖向最大升温温差发生在每天14时左右,1 a中9月份的竖向升温温差相对较大;运用本地区竖向升温模式计算的混凝土拉应力略大于现行公路规范计算值,小于现行铁路规范计算值。The changing regularity of vertical temperature gradient was studied based on the temperature data of Sanguxian viaduct in Heilongjiang Province, and a vertical wanning pattern was obtained. Then, the self-equilibrating thermal stresses and restraint stress produced by different vertical warming patterns were calculated according to this vertical warming pat- tern, Railway Bridge Norm and Highway Bridge Norm. Result showed that the greatest vertical wanning temperature difference of the box girder happened at 2 pm every day and in September every year. The concrete tensile stress calculated by the vertical wanning pattern in this region was slightly higher than that of Highway Bridge Norm and less than that of Railway Bridge Norm.

关 键 词：箱梁 升温温差 温度梯度 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]