摘要
刘家峡大桥横跨黄河刘家峡水库,为主跨536 m的单跨双铰钢桁加劲梁式悬索桥,建成后将成为西北地区单跨跨度最大的悬索桥,同时也是国内同规模桥梁中宽跨比最窄的悬索桥,宽跨比为1∶34.4。本文以刘家峡悬索桥为背景,在施工监控中获取实测主缆线形,对原始设计吊索的下料长度进行了精确的调整,并引用基于归一化原理的影响矩阵法对其吊索索力进行了优化分析,最终该桥吊索索力达到最佳受力状态。还论述了温度对吊索索力的影响,得出当温度线性变化时,各吊索索力变化不一致,但总体变化都很小。
Liujiaxia suspension bridge across the Yellow River reservoir,it is the twist of singlespan steel truss stiffening girder suspension bridge of 536 meters main span,which will become the largest single-span suspension bridge span in northwest,and the width-span ratio is narrowest of scale bridges in the domestic suspension bridge. The width span ratio is 1 ∶ 34. 4. The bridge pylon used the steel concrete structure with a diameter of 3. 0 m. The bridge structure is mainly rely on the cable system to undertake most of the load,the cable system is said to be the ＂lifeline＂of suspension bridge. Based on the background of Liujiaxia suspension bridge main cable shape,get the measured result in construction,and calculation accurately the original design of hanger length,also and based on the principle of matrix method in hanger forces optimization analysis. Finally the hanger forces to reach the best station. This paper also discusses the influence of temperature on the hanger,when the linear temperature changed,the hanger forces changes is not consistent,but the overall changes are small.
出处
《公路工程》
北大核心
2015年第3期42-45,69,共5页
Highway Engineering
基金
国家自然科学基金项目(51368032)
关键词
刘家峡悬索桥
索力
影响矩阵
优化
liujiaxia suspension bridge
hanger force
influence matrix
optimization
