作　　者： ; ; ; ; ;

机构地区： 华南理工大学土木与交通学院

出　　处： 《公路》 2016年第10期18-23,共6页

摘　　要： 建立了广州珠江黄埔大桥大跨径正交异性钢箱梁桥支撑体系的有限元模型,计算了正常载重车和3倍超载车作用下桥面铺装层内部的应力和应变,分析了桥面铺装材料需要满足的强度、变形等性能指标。以有限元分析为依据,研制了新型环氧树脂基混凝土,通过4点弯曲试验,对新材料的强度、极限应变等性能参数进行了评估。计算和试验结果表明,在桥面铺装材料的性能设计中需要更多地考虑轮载局部作用下铺装层内的应力状态和变形情况;新研制的环氧树脂基混凝土的基本力学性能满足相应的性能指标,是值得进一步系统研究的潜在大跨径钢箱梁桥桥面铺装材料。 Based on the finite element model of large-span steel bridge with orthotropic support system of Huangpu Pearl River Bridge,the stress and strain of deck pavement under normal and overload vehicle loads are calculated,the requirement of strength and deformation of pavement materials are analyzed.On this basis,a new type of epoxy resin-based concrete is developed.The strength,ultimate strain and a series of valuable performance parameters are evaluated by four-point bending tests.The results of simulation and experiments show that the local stress and deformation of the pavement under wheel loads need more consideration in the material performance design of bridge deck pavement;the mechanical properties of the new epoxy-based concrete meet the corresponding performance requirements,and the new epoxy-based concrete is one of the potential materials for large span steel bridge deck pavement that worthy of further systematic research.

关 键 词： 大跨径钢箱梁桥 桥面铺装 环氧树脂基混凝土 超载 强度

领　　域： [建筑科学] [交通运输工程]