斜拉桥的极限跨径分析  

Limit Span Analysis of Cable-stayed Bridges

作　　者：邓小康 彭蓉 李永明 

机构地区：[1]武汉市市政工程质量监督站,湖北武汉430010 [2]广西交通科学研究院,广西南宁530007

出　　处：《西部交通科技》2016年第8期46-48,88,共4页Western China Communications Science & Technology

摘　　要：文章从斜拉索强度、主梁强度等静力性能方面对斜拉桥的极限跨径进行探讨,以苏通长江大桥为例对斜拉桥离索塔最远拉索的受力情况进行了详细分析,并计算出该情况下的斜拉桥极限跨径,同时采用笔者编制的程序对靠近主塔的主梁根部位置进行轴向受力分析,得出了主梁强度是限制斜拉桥跨径增大的关键因素的结论。This article discussed the limit span of cable-stayed bridges from the aspects of stayed cable intensity,main beam intensity and other static properties,and with Sutong Yangtze River Bridge as the example,it conducted the detailed analysis on the force situation of the cable furthest away from the cable tower in cable-stayed bridge, and calculated the limit span of cable-stayed bridge under such situation,while using the program prepared by the author to conduct the axial stress analysis at the main beam root position close to main tower,and then obtained the conclusion that the main beam intensity is the key factor to limit the span increase of cable-stayed bridges.

关 键 词：斜拉桥 极限跨径 高跨比 索距 斜拉索强度 主梁强度 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]