瓯飞一期围垦工程通航闸开启桥结构设计及有限元分析

Structural Design and FEA of Bascule Bridge in Navigation Lock of Oufei PhaseⅠReclamation Project

海洋避风港、避风锚地建设工程中的通航闸开启桥存在影响通航、安装检修不便、难以适应沿海环境等弊端。为此研制出一款新型的开启桥,并应用于温州瓯飞一期围垦工程。该开启桥在通航孔一侧土建基础上沿道路纵向布置升降桥体及移动桥体,通过载荷分析确定危险工况,得出对于小跨度开启桥,整体结构计算宜采用车辆载荷;同时建立虚拟样机,对桥体结构作静力学、模态、瞬态、疲劳分析,并模拟车辆通过桥梁的动态过程,得出类似开启桥移动载荷对结构产生的动态响应可取不小于1.15的系数。

In order to cover the disadvantages in the bascule bridge of navigation gate in ocean harbor and wind shelter anchorage,such as the difficulty and inconvenience in navigating,installing,maintaining and adapting to coastal environment,a new type of bascule bridge is developed and applied to Oufei PhaseⅠReclamation Project in Wenzhou.On the basis of navigable lock side,the lifting bridge body and moving bridge body are arranged lengthwise along the road.The dangerous condition is determined by load analysis,and the vehicle load should be used in the whole structure calculation of the small span bascule bridge.At the same time,a virtual prototype is established to carry out statics,modal,transient and fatigue analysis of the bridge body structure,and simulate the dynamic process of vehicles passing the bridge.It is concluded that the dynamic response of moving load to the structure can be considered with a coefficient of not less than 1.15.