摘要
采用混合法研究张力腿定位的曲线形水中悬浮隧道的温度内力。分析表明,由温度升高导致隧道膨胀(或收缩)所产生的轴向力很小,主要是径向力,同时还会产生扭矩和弯矩。通过数值实验给出张力腿的水平径向力与张力腿弹簧系数、隧道曲率半径、截面抗弯刚度及圆心角之间的变化关系。计算结果表明温度内力变化复杂,两组张力腿温度内力此消彼长。
Using mixed method, temperature induced internal forces of a curved submerged-floating tunnel （SFT） supported by tension legs were investigated. The analysis indicated that axial forces were far smaller than radial forces, which were produced by temperature changes, and bending moment and torsional moment of SFT were produced by thermal forces of tension legs. Numerical test for the Qian-dao Lake case gave the relation that the radial force of tension legs varied with spring constant of tension legs, flexural rigidity, curvature radius and central angle of SFT. The results showed that one of temperature induced internal forces of two groups of tension legs were increasing, but the other were decreasing when one of foregoing factors changed. In the design of curved SFT, the influence of internal forces by temperature changes needs to be considered.
出处
《工程力学》
EI
CSCD
北大核心
2006年第A01期21-24,共4页
Engineering Mechanics
基金
国家自然科学基金重点项目(10532070)资助
关键词
水中悬浮隧道
温度内力
混合法
阿基米德桥
张力腿
submerged floating tunnel （SFT）
thermal force
mixed method
Archimedes bridge
tension leg
