横向异种类型混合桥面设计方法

摘要:

在重车道采用疲劳性能较优但重量或造价较高的桥面形式，如超高性能混凝土（UHPC）华夫板、超高性能混凝土（UHPC）钢组合板等，在快车道采用传统正交异性钢桥面，组成混合桥面系统，可提升桥面结构疲劳寿命的同时降低结构的自重或造价，充分利用材料性能。针对横向由不同类型桥面组成的混合桥面，通过梁格模型参数分析得到了桥面板跨度、桥面板构造参数等对其各部分承担荷载比例和横向有效宽度的影响规律，并拟合分析数据得到了计算公式。基于此，提出了混合桥面的设计方法。

Abstract:

Bridge deck with better fatigue performance, high self-weight or price, e.g. UHPC waffle deck, UHPC-steel composite deck, is suitable to be applied in slow lane. Traditional orthotropic steel deck (OSD) is more suitable for middle lane and fast lane to reduce self-weight. Combination of those two kinds of bridge deck together forms hybrid deck system, which have better fatigue performance and low self-weight. Load barrier ratio and effective width of hybrid deck system are analyzed base on a series of grid models. Equations to calculate load barrier ratio and effective width are fitted to the analysis data. Finally, design method of hybrid bridge deck is purposed.