摘要
多跨长联桥由于梁体的长度很长,年温差会导致活动支座产生很大的位移;梁端也会产生很大的变形,支座预设偏移量、梁端伸缩缝型号选择是多跨长联桥设计中难以精确确定而又十分重要的问题。文章先提出年温差引起多跨长联桥活动支座位移量、梁端伸缩量的计算方法,再以一座14跨悬臂浇筑施工的多跨长联预应力混凝土连续箱桥为工程实例,进行详细说明。
The annual temperature difference often leads to the offset of the movable supports and the deformation at the tip of the girder because of the lengthy span of the multi-span continuous girder. It is important yet difficult to calculate the displacement of the preset supports and choose the right type of the expansion joints for the multi-span continuous girder. This paper first presents the method for calculating the displacement of movable supports and the expansion amount at the tip of the girder due to the annual temperature difference, and then a practical example of a 14-span continuous concrete box girder is discussed in detail.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第4期639-644,共6页
Journal of Hefei University of Technology：Natural Science
关键词
年温差
多跨长联桥
支座位移量
梁端伸缩量
annual temperature difference
multi-span continuous girder
displacement of movable supports
expansion amount at the tip of the girder
