摘要
为研究三塔斜拉-自锚式悬索协作体系桥温度效应下的受力机理和工作性能,以某在建桥梁为依托工程,制作了1∶20缩尺试验模型,研究了桥梁整体温差、索梁温差、桥塔日照和桥面日照等4种工况下桥梁结构的变形响应及索力变化规律。结果表明:在这4种工况下,相邻吊索索力变化呈现正负跳跃的特点,影响索力的均匀性;索梁温差对主梁位移影响最大,对短索索力影响也较大;分缆索力变化值均较小。
In order to study the mechanical performance of the cable-stayed self-anchored suspension composed bridge withthree towers under temperature effect, a model bridge with 1 ： 20 reduced scale was made, and it＇s deformation perform-ances were studied under four conditions, which were uniform temperature change, temperature difference between cablesand girder, sunshine temperature difference on tower and sunshine temperature difference on girder. The results show thatthere are the same change trends of adjacent hanger tension in suspension section, one banger tension increase and anotherdescend, which has greatly influenced the uniform distribution of hanger tension. Under the condition of temperature differ-ence between stayed cables and girder, the degree of the girder deformation changes and of the tensions changes of shortstayed cable are probably significant.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2017年第1期1-8,共8页
Journal of Chongqing Jiaotong University(Natural Science)
关键词
桥梁工程
斜拉-自锚式悬索协作体系桥
模型试验
温度效应
bridge engineering
cable-stayed self-anchored suspension composed bridge
model test
temperature effect
