摘要
曲线桥以直代曲,即将曲线梁桥展开,按照中心线长度一致的直线桥进行设计计算的关键,是判别条件的确定。鉴于目前的研究多针对一根单梁,且未考虑墩高的影响,本文以深圳某立交匝道桥为背景,采用有限元分析方法,对高墩小半径曲线梁桥力学性能进行分析,在此基础上提出了适用于高墩连续曲线梁桥以直代曲计算的判别公式。公式形式简单,并考虑了半径、桥长、桥面宽三个因素的影响,实践表明:公式准确性较好。
Replacing curve by straight line means calculating the curved bridge as the straight bridge which has the same length of center line. And the key. of this method is confirming the judgment condition. Now the studyings of this method mostly focus on the single beam, and do not consider the height of the pier. So in this paper the mechanical performance of high-pier and small-radius curved bridge is analyzed using the finite element method, furthermore a judgment formula for replacing curve by straight line of high-pier continuum curved bridge is summed up. The formula is simple, and considers the inflection of radius, length and width of the bridge, and veracity is good.
出处
《工程抗震与加固改造》
北大核心
2009年第2期16-20,54,共6页
Earthquake Resistant Engineering and Retrofitting
基金
深圳市交通局项目:梧桐山立交高墩小半径曲线桥结构分析与研究
关键词
高墩
连续
曲线桥
以直代曲
high-pier
continuum
curved bridge
replacing curve by straight line
