作　　者： ; ; ; ; (余印根）;

机构地区： 福州大学土木工程学院

出　　处： 《桥梁建设》 2016年第6期88-93,共6页

摘　　要： 为解决中、下承式钢管混凝土拱桥桥面系强健性不足的问题,从概念设计和结构设计的角度提出强健性设计的要点。总结结构强健性的概念及其在桥梁工程中的应用,按严重程度将拱桥断索事故分为三级,据此提出吊杆不破断、桥面系在吊杆破断时不落梁的强健性设计要求。基于强健性将不同结构的桥面系分为五类,在此基础上对桥梁主结构的强健性设计提出建议:对于吊杆,应进行强健性设计对应的破坏安全极限状态设计计算;对于第四类桥面系,其加劲纵梁需要具备足够的刚度与承载力;对于刚架系杆拱,应加强系杆的强健性设计,并应使下部结构具有足够的抗水平推力的安全储备。 To resolve the problem regarding the insufficient robustness of the floor systems on the half-through and through concrete-filled steel tube arch bridges, the highlights of the robust- ness design are presented from the angle of the conceptual design and structural design and the con- cept of the structural robustness and the applying of the concept to the bridge engineering are summed up. The failure of the hanger breaking of the arch bridges is classified into three levels ac- cording to the severity degrees of the failure and further according to the classification, the require- ments for the robustness design of the floor systems under the situations that the hangers do not break and that the hangers break, but the girders do not collapse are set forward. In terms of the concept of the robustness, the floor systems of the different structures are classified into five types and on the basis of the classification, the robustness design of the main structures of the arch bridges is proposed. For the hangers, the failure safety limit state corresponding to the robustness design should be designed and calculated. For the floor system type four, the stiffening stringers of the floor system should have sufficient rigidity and bearing capacity and for the rigid-frame tied arch bridge, the robustness design of the tie members of the bridge should be reinforced and the substructure of the bridge should be made to have the sufficient safety margin of horizontal thrust resistance.

关 键 词： 拱桥 钢管混凝土结构 桥面系 吊杆 主拱 强健性设计 破坏安全极限状态

领　　域： [建筑科学] [交通运输工程] [建筑科学] [交通运输工程]