车辆荷载对中承式拱桥吊杆体系的冲击效应分析

发布时间：2017-12-30 20:11

  本文关键词：车辆荷载对中承式拱桥吊杆体系的冲击效应分析　出处：《公路交通科技》2016年01期 　论文类型：期刊论文

  更多相关文章： 桥梁工程 中承式拱桥 车桥耦合迭代 冲击效应 车辆荷载

【摘要】：为深入研究中承式拱桥吊杆体系的耐久性,针对发生破坏的实例中短吊杆更易疲劳破坏的现象,考虑不平度影响,采用车桥耦合迭代方法,对某中承式钢管混凝土拱桥吊杆体系在车辆荷载下的冲击效应进行了数值模拟。分析了不同车速和桥面不平度下,吊杆动态内力(应力)的变化规律;比较了不同长度(位置)的吊杆在车辆荷载下所受冲击效应的特点和差异;根据车速分布模型,对吊杆在各种车速下的冲击效应进行了加权分析和综合评价。结果表明,在车辆荷载作用下,桥面不平度对吊杆的冲击效应影响明显;短吊杆的动态内力显著大于长吊杆,二者之间的最大差别幅度可达到28%。
[Abstract]:For the durability of the suspender system in-depth research, for example the failure of short suspenders more easily fatigue failure phenomenon, considering the roughness, based on the coupled iteration method of a bearing type steel pipe concrete arch bridge suspender system in vehicle loading shock effect was simulated was analyzed. Different speed and surface roughness of bridge deck, suspender internal force (stress) dynamic variation; comparison of different length (location) characteristics and differences in the impact effect of suspender under vehicle load; according to the speed distribution model, the weighted analysis and comprehensive evaluation on the impact of boom in various speeds. Results show that the vehicle load, the impact effect of surface roughness of bridge deck of the suspender is obvious; dynamic force of short suspenders was significantly larger than the long boom, the biggest difference between the two amplitude can reach 28%.

【作者单位】： 大连海事大学道路与桥梁研究所;
【基金】：国家自然科学基金项目(51178070) 中央高校基本科研业务费专项资金项目(3132014326)
【分类号】：U441
【正文快照】： 0引言中承式拱桥因其简洁明快的曲线、较大的桥梁跨径和通航能力,在近几十年内得到了广泛使用。在这类桥梁结构中,吊杆体系是重要的承重构件之一,其运行状况直接关系到桥面系的安全。然而,吊杆体系恰恰又是这类桥梁结构中耐久性较为薄弱的部分。近年来中承式拱桥发生的一些破，

本文编号：1356318