怎样设计组合式系杆拱桥  

How to Design Combined Tie-arch Bridge

作　　者：金成棣[1] 赵天麟 JIN Chengdi;ZHAO Tianlin

机构地区：[1]同济大学,上海200092 [2]上海兰德公路工程咨询设计有限公司,上海200072

出　　处：《上海公路》2021年第3期58-62,91,M0005,M0006,共8页Shanghai Highways

摘　　要：组合式系杆拱桥是指跨中局部范围布置单榀拱肋、其余两侧采用双榀成提篮式,或在满足建筑限界要求范围内设平行式的拱桥,其二榀间一般采用框架式联结系。对于中承式系杆拱桥,桥面以下设置K式桁架联结系。为了改善拱肋面外稳定性,一般采用斜吊杆以及设置边跨系梁;或者采用中承式,以降低拱肋面外失稳时的屈曲系数,从而提高上述组合拱的跨越能力。现着眼于上述设计设想提供编制的方案路线及相应的稳定性验算实用公式,并以算例作出说明。The combined tied-arch bridge refers to the mid-span local range layout of one truss arch rib and the other two sides of the double truss arch rib into a basket type,or in the scope of satisfying the requirements of construction clearance set parallel double truss arch rib between the general use of frame type coupling.The lower part of bridge floor set K truss coupling for the middle type bridge.In order to improve the stability of the arch rib outside,the inclined hanger and the side span tie beam are generally adopted,or the middle type is adopted to reduce the buckling coefficient of outside stability of the arch rib,so as to improve the crossing ability of the above-mentioned built-up arch.Focusing on the design ideas above,this paper provided the formulation of the scheme route and the corresponding practical formula of stability checking,and provided an example to illustrate.

关 键 词：组合式系杆拱桥 框架式联结系 K式桁架联结系 抗压承载能力 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]