摘要
运用有限元法对黄河二桥下承式系杆拱桥双层沥青混凝土铺装体系进行受力分析,确定了全桥的最不利荷位,提出了系杆拱桥面铺装设计控制指标,并在各个指标的最不利双轮加载方式下,进一步分析了车轮附近区域沥青混凝土铺装层各控制指标的变化规律,同时给出其相应的三维图。为确定水平荷载对铺装层各控制指标的影响,本文还分析了不同水平荷载下各控制指标的变化规律。为更准确地模拟实际边界条件,分析的整个过程是在包括梁、拱肋、吊杆和桥面铺装等部分的整体桥梁结构上实现的。结合力学分析所得结论进行了相应试验研究,建立了不同温度下水泥混凝土桥面板与沥青铺装层间的剪切强度与黏结强度关系式,并确定了15℃时该桥铺装层层间稳定性控制指标——容许黏结强度。最后,进行现场拉拔试验,检验实桥上的层间稳定性。
Using FEM, the structural behavior of the double-layered asphalt concrete of the second Huanghe bridge is analyzed. The least favorable loading location of the overlays is determined, and a design control index of the asphalt surfaces is proposed. At the least favorable loading cases of all indices, the variations of asphalt overlays around the wheels are analyzed and corresponding three-dimensional graphs are presented. To determine the influence of horizontal cyclic load on control indices, the variations of asphalt overlays under various horizontal cyclic loads are analyzed. To simulate the boundary conditions, the entire bridge, including beams, arch fibs, suspenders and the overlays, is taken into account in the analysis. Experiments are conducted in coordination with the finite element analysis. From this study, a relationship between shearing strength and binding strength under various temperatures is established, and the interlayer stable control index, the allowable bonding strength, under 15℃, are also determined. In-situ pullout test is performed to check the stability of inter-layers.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第7期88-93,103,共7页
China Civil Engineering Journal
关键词
有限元
下承式系杆拱桥
桥面铺装
防水黏结层
抗剪强度
黏结强度
FEM
through tied arch bridge
bridge deck overlays
waterproof-and-binding layer
shearing strength
bonding strength
