大跨径组合梁斜拉桥经济性能研究

发布时间：2018-01-29 10:37

  本文关键词： 斜拉桥 组合梁 钢箱梁 斜拉索 桥塔 基础 经济性能 平均索法 轴力 材料单价系数　出处：《世界桥梁》2017年05期 　论文类型：期刊论文

【摘要】：为推动组合梁斜拉桥向更大跨径发展,以常规两塔斜拉桥为例,开展大跨径组合梁斜拉桥经济性能研究。将斜拉桥分为斜拉索、桥塔、主梁、基础等部分,利用"平均索法"计算各部件轴力,根据轴力大小分别推导得到其材料用量的计算公式,引入材料单价系数,得到单位桥面面积造价,进而计算组合梁斜拉桥各部件的造价与跨径的关系,并与同等跨径的钢箱梁斜拉桥的经济性能进行对比分析。结果表明:与钢箱梁相比,组合梁斜拉桥充分利用混凝土材料抗压性能性价比高的特点,减小了斜拉桥体系中造价占比较大的主梁费用;组合梁斜拉桥主梁自重较大,斜拉索、桥塔、基础等造价相对较高;在一般地质(桩长约50m)、较小场地风速条件下,组合梁斜拉桥的经济跨径界限可达900m。
[Abstract]:In order to promote the development of cable-stayed bridge to larger span, a conventional two tower cable-stayed bridge as an example, to carry out research on economic performance of large span span cable-stayed bridge. The cable-stayed bridge is divided into cable, tower, girder, part of the foundation, the average axial stress calculation method of each component, using "cable" according to the axial force are derived the calculating formula of material dosage, introducing price coefficient, unit cost and deck area, calculate the relationship between cost and the span of the cable-stayed bridge components, and with the same span cable-stayed bridge with steel box girder of the economic performance were analyzed. The results showed that: compared with steel box beam in combination, make full use of compressive properties of concrete material with high performance girder cable-stayed bridge, reduces the cost of cable-stayed girder cost relatively large bridge system; cable-stayed bridge girder weight larger cable, tower foundation, the cost is relatively high; In general geology (pile length is about 50m), under the condition of small field wind speed, the economic span limit of the composite beam cable-stayed bridge can reach 900m.

【作者单位】： 同济大学桥梁工程系;上海市政工程设计研究总院(集团)有限公司;
【基金】：国家重点基础研究发展计划(973计划)项目(2013CB03603)
【分类号】：U448.27
【正文快照】： 1引言据统计,目前跨度超过650 m的大跨径桥梁,加劲梁普遍采用正交异性钢桥面板结构[1]。近年来这类桥梁的钢桥面疲劳开裂、铺装层损坏等问题严重[2-3]。从经济性和耐久性考虑,采用组合桥面是解决上述问题的选择之一[4-5]。组合钢板梁斜拉桥能适应650m左右跨径。组合梁斜拉桥如，

本文编号：1473211