热轧纵肋与传统纵肋正交异性钢桥面铺装层受力特性对比研究

发布时间：2018-02-24 02:48

本文关键词： 热轧纵肋正交异性钢桥面板铺装层车辆荷载　出处：《公路工程》2017年05期 　论文类型：期刊论文

【摘要】：为研究热轧纵肋正交异性钢桥面板铺装层的受力特性,首先建立了钢桥面铺装体系的精细化有限元分析模型,进行多轮位工况下的仿真分析,得到铺装层主要设计指标(表面最大拉应力、层底最大剪应力及最大竖向压应变)对应的最不利荷位,并与传统纵肋钢桥面铺装模型进行比较。对热轧纵肋钢桥面铺装层主要设计指标进行构造参数局部敏感性分析,得出各指标的主要影响参数。研究结果表明:当采用相同铺装方案时,热轧纵肋钢桥面铺装层最大竖向压应变相对传统纵肋钢桥面铺装层的更小,从而表现出更好的抗车辙能力;铺装层弹性模量、铺装层厚度与顶板厚度对各设计指标影响较大,而横隔板厚度与纵肋肋底厚度的影响较小。
[Abstract]:In order to study the mechanical characteristics of slab pavement of orthotropic steel bridge with longitudinal ribs, a fine finite element analysis model of steel bridge deck pavement system was established, and the simulation analysis was carried out under multi-wheel position. The most unfavorable load position corresponding to the main design indexes (maximum surface tensile stress, maximum shear stress and maximum vertical compressive strain) of the pavement is obtained. Compared with the traditional longitudinal ribbed steel deck pavement model, the local sensitivity analysis of the main design indexes of the hot rolled longitudinal ribbed steel deck pavement is carried out. The main influence parameters of each index are obtained. The results show that when the same pavement scheme is adopted, the maximum vertical compressive strain of hot rolled longitudinal ribbed steel deck pavement is smaller than that of traditional longitudinal rib steel deck pavement. The elastic modulus of pavement, thickness of pavement and thickness of roof have great influence on each design index, while the thickness of transverse partition and thickness of longitudinal rib have little effect on the design index.
【作者单位】：西南交通大学土木工程学院;
【分类号】：U443.33

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