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.
出处
《公路》
北大核心
2016年第10期18-23,共6页
Highway
基金
国家自然科学基金项目
项目编号11272124
11472109
广东省交通运输厅科技项目
项目编号2012-02-033
2013-02-095
华南理工大学亚热带建筑科学国家重点实验室自主研究课题
项目编号2014ZC17
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
large span steel box girder bridge
bridge deck paving
epoxy-based concrete
overload
strength
