黄河桃花峪自锚式悬索桥体系转换方案的比较研究

发布时间：2018-07-09 23:55

本文选题：桥梁工程 + 双塔三跨平面主缆自锚式悬索桥　；参考：《土木工程学报》2014年09期

【摘要】：结合世界最大跨度自锚式悬索桥黄河桃花峪大桥的工程实例,针对平面主缆双塔三跨自锚式悬索桥缆索体系各阶段的几何和力学特点,明确该桥型吊索张拉有"先边后中"、"边中共进"2类和每类6种的吊杆张拉思路,分析空缆状态及各种方案转换过程缆索系统的几何与力学特点、"多轮循环法"与"逐步推进法"的施工特点,指明体系转换方案择优的方向。在此基础上,确定并比较"先边后中"的方案2、"边中共进"的方案1和"边中共进"的方案2,明确"先边后中"的方案2和"边中共进"的方案1是黄河桃花峪大桥较优的体系转换方案,且各有特点和优势。继而给出其中之一的体系转换优选典型方案——"先边后中"的方案2的关键计算结果,证明该方案的可行性、安全性、经济性和可控性。体系转换的结构效应实测值与理论值吻合良好,表明了体系转换方案确定与论证的正确性,以及体系转换方案实施的高质量。
[Abstract]:Combined with the engineering example of Taohuayu Bridge of the Yellow River with the world's largest span self-anchored suspension bridge, the geometric and mechanical characteristics of cable system of plane main cable and three-span self-anchored suspension bridge are analyzed. It is clear that the bridge type sling tension has "first edge, second middle", "side into" 2 types and each type of 6 kinds of suspender tension train of thought. This paper analyzes the geometric and mechanical characteristics of cable system in the state of aerial cable and the conversion process of various schemes, the construction characteristics of "multi-wheel circulation method" and "step by step advance method", and points out the preferred direction of system conversion scheme. On this basis, To determine and compare the "first edge and then the middle" scheme, the "edge common progress" scheme 1 and the "edge common progress" scheme 2. It is clear that the "first edge, second" scheme and the "edge common progress" scheme 1 are the better system conversion schemes for the Taohuayu Bridge on the Yellow River. And each has its own characteristics and advantages. Then, the key calculation results of one of the typical schemes of system transformation, "first edge, second middle", are given, and the feasibility, security, economy and controllability of the scheme are proved. The measured value of structural effect of system conversion is in good agreement with the theoretical value, which indicates the correctness of the determination and demonstration of the system conversion scheme and the high quality of the implementation of the system conversion scheme.
【作者单位】：长沙理工大学桥梁工程安全控制省部共建教育部重点实验室;
【基金】：国家自然科学基金(51078041,51378080) 博士点基金(20114316110002) 湖南省自然科学基金(11JJ3048) 长沙理工大学桥梁与隧道工程创新性项目(11CA09) 桥梁工程湖南省普通高校重点实验室开放基金(10KA13)
【分类号】：U448.25

【相似文献】