桥面板连接方式对桁架拱受力影响研究

Analysis and Research on the Force of Bridge Panel Connection on Truss Arch

为研究桥面板连接形式对桁架拱桥受力性能的影响规律,通过对比分析在恒载作用下对混凝土桥面板和系梁的受力影响,同时对结构的变形进行分析,研究不同桥面系连接形式下系杆预应力的传递效率。结果表明,方案三钢混凝土桥面板与系梁在全桥范围内连接在受力方面改善较大,且中系梁轴力极值最小,方案三的系杆的预应力传递效率较低,但系杆力工况下方案三能更快地使桥面板应力在横桥向趋于平均,且跨中横桥向应力更趋于平均,因此综合可知方案三连接效果更好。

In order to study the influence of bridge deck connection forms on the mechanical performance of truss arch bridges,a comparative analysis was conducted on the mechanical effects of concrete bridge deck and tie beams under dead load,and the deformation of the structure was analyzed to study the transfer efficiency of tie bar pre-stress under different bridge deck connection forms.The results show that the connection between the steel-concrete bridge deck and the tie beam in Scheme III has a significant improvement in stress throughout the entire bridge range,and the axial force extreme value of the middle tie beam is the smallest.The prestressed transfer efficiency of the tie rod in Scheme III is relatively low,but under the tie rod force condition,Scheme III can make the bridge deck stress tend to average more quickly in the transverse direction of the bridge,and the transverse stress in the middle span tends to average more.Therefore,it can be concluded that Scheme III has a better connection effect.