矢跨比对拱承式渡槽抗震性能影响的研究

矢跨比是拱承式渡槽重要的设计参数，分析其对渡槽抗震性能的影响对地震区渡槽建设设计具有重要意义。以东滑峪渡槽为例，运用有限元软件ANSYS，对不同矢跨比有限元模型进行静力分析、模态分析和瞬态动力分析。通过对关键位置横槽向位移和拱圈内力变化规律的分析，确定渡槽的最优矢跨比。综合考虑各因素，不论静力荷载单独作用，还是静力荷载和地震荷载共同作用，该渡槽结构的最优矢跨比均为1/6。

Research on Rise-span Ratio influencing the Seismic Performance of Deck Arch Aqueduct

Abstract: Rise-span ratio is an important parameter in the design of arched aqueduct. Analyzing the influence of rise-span ratio on seismic performance of arch aqueduct is of great importance to the design of arch aqueduct in seismic region. The paper takes Donghuayu aqueduct as an example. With the finite element software ANSYS, the static, modal and transient dynamic analyses of finite element models of different rise-span ratios are performed. The optimal rise-span ratio is determined according to the displacement of the transverse grooves and the changes of the internal forces of the arch in the key portion. With all the factors considered, whether under the static load alone or under the combined static and seismic load, the optimal rise-span ratio is 1/6.