曲线混凝土箱梁桥日照温度场及其支座作用效应研究  

Research on Sunshine Temperature Field of Curved Concrete Box Girder Bridge and Its Bearing Effects

作　　者：盛显峰 周世轩[2] SHENG Xian-feng;ZHOU Shi-xuan(Dalian Japan-China Technology Research Co.,Ltd.,Dalian,Liaoning 116023,China;Design Institute of Civil Engineering&Architecture Dalian University of Technology Co.,Ltd.,Dalian,Liaoning 116024,China)

机构地区：[1]大连日中技研有限公司,辽宁大连116023 [2]大连理工大学土木建筑设计研究院有限公司,辽宁大连116024

出　　处：《山西交通科技》2023年第2期76-81,共6页Shanxi Science & Technology of Transportation

摘　　要：曲线梁桥因为自身弯扭耦合的特性,在太阳辐射的作用下,容易产生支座脱空、横向爬移等温度作用病害。针对曲线混凝土箱梁桥的日照温度场和温度作用效应问题,基于某三跨连续曲线混凝土箱梁桥实例,通过ABAQUS建立该桥三维实体单元模型,在考虑阴影长度和纵向遮挡的基础上,计算分析曲线箱梁桥日照温度场和温度作用效应对支座反力的影响。结果表明,日照升温作用下,支座径向反力要大于切向反力,曲线梁桥整体呈现曲率半径增大的趋势;支座切向位移要大于径向位移,曲线梁桥整体呈现向外侧偏移、变宽和变长的趋势。Curved girder bridges,because of their own bending-twisting coupling characteristics,are prone to temperature action diseases such as bearing debonding and lateral creep under the action of solar radiation.In this paper,focusing on the sunshine temperature field and temperature effect of curved box girder bridges,the three-dimensional solid unit model of a three-span continuous curved concrete box girder bridge was established by ABAQUS,and influences of the sunshine temperature field and temperature effect of the bridge on the bearing reaction were calculated and analyzed considering the shadow length and longitudinal shading.The results showed that under the sunlight-warming effect,the radial bearing reaction was greater than the tangential bearing reaction,and the radius curvature of the curved girder bridge tended to increase.The tangential displacement of the bearing is more than the radial displacement,and the overall curved girder bridge tended to shift outward and become wider and longer.

关 键 词：曲线箱梁桥 太阳辐射 温度场分布 温度作用效应 模拟分析 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]