钢桥面系统各项参数敏感性分析

Sensitivity Analysis of Geometry Parameters of Steel Bridge Deck System

大跨径钢桥桥面系统一般由钢箱梁盖板、纵向加劲肋、横隔板以及沥青铺装层组成 ,在车辆荷载作用下 ,铺装层的受力状态相当复杂。作为沥青铺装层的支承体系 ,钢桥面板体系的结构特性与结构刚度是影响铺装层受力的主要因素 ,因此就可以通过改变桥面系统各项参数来分析桥面系统刚度的改变对铺装层受力的影响程度。本文利用有限条分析方法 ,对影响桥面系刚度的各项参数进行计算分析 ,揭示了钢桥面沥青铺装层受力大小与桥面系统各项参数的内在联系。

Deck system of long span steel-bridge are always composed of box-girder top slab, longitudinal stiffened rib, transverse beam and asphalt paving, so its mechanics state under vehicle loadings is very complex. As the supporting system of asphalt paving, the main factors that influence the mechanics state of asphalt paving are the characteristics and rigidity of deck system, it is possible to analyze the impact of deck system rigidity on asphalt paving by change the deck system parameters. Using Finite-Strip Method, this paper presents the analysis of several parameters that will change the rigidity of deck system and reveal the inner links between deck paving and geometry parameters of steel bridge deck system.