【摘要】 以临岳高速洞庭湖大桥为例,研究STC桥面铺装层对大跨径悬索桥整体性能的影响,对比分析不同的铺装方案、不同的铺装厚度下桥梁的静动力性能.结果表明:STC桥面铺装层能够有效提高桥梁整体刚度、改善桥梁主要构件的受力状态;在恒载+车道荷载组合工况条件下, STC桥面铺装层的厚度变化对桥梁整体刚度及主要构件的受力状况的影响是线性的.此外,STC桥面铺装方案能够提高大跨径悬索桥横向摆动的自振频率,改善其动力稳定特性;结构横向自振频率随STC层铺装厚度的变化也是线性的.更多还原

【Abstract】 Taking Linyue Expressway Dongting Lake Bridge as example, the influence of STC deck pavement on the overall performance of long-span suspension bridge is studied. The static and dynamic performances of bridges under different pavement schemes and different pavement thickness are compared and analyzed. The results show that STC deck pavement can effectively increase the overall stiffness of the bridge and improve the stress state of the main components of the bridge. Under the combined condition of constant load plus lane load, the influence of the thickness of the STC layer on the overall stiffness of the bridge and the stress of the main components is linear. In addition, STC bridge pavement can increase the natural vibration frequency of transverse swing of long-span suspension bridge and improve its dynamic stability. The variation of the transverse natural vibration frequency of the structure with the thickness of STC layer pavement is also linear.更多还原