摘要
选取国内外四种温度梯度规范作为计算工况,对一座在役连续箱梁桥的温度效应进行分析,并与汽车活载所引起的效应进行对比.分析结果表明:不同温度梯度模式下的效应分布具有一定相似性,但随着温差分布形态及特征值的不同,温度效应值相差很大.温度效应在主梁底缘引起拉应力,和汽车荷载效应引起的拉应力相当,因此温度的作用在桥梁设计中应当被充分考虑.
Based on an in-service continuous box beam bridge,the temperature effect under four kinds of temperature gradient standard at home and abroad were analyzed and compared with the effect under vehicle live load. The results show that the distribution of effect under different temperature gradient mode has a certain similarity,but the value of temperature effect varies greatly with the difference of temperature distributional pattern and characteristic value. Moreover,the effect of temperature causes tensile stress on the primary beam hemline corresponding to the effect of vehicle load. Therefore,the action of temperature should be fully considered in bridge design.
出处
《内蒙古科技大学学报》
CAS
2015年第3期289-293,共5页
Journal of Inner Mongolia University of Science and Technology
关键词
连续箱梁
温度梯度
温度应力
汽车荷载
continuous box girder
temperature gradient
thermal stress
vehicle load
