摘要
本文将梁拱组合桥梁跨中挠度与同结构纯连续梁跨中挠度的比值定义为梁拱分承比,并用力学方法推导了连续梁拱组合桥在中跨均布荷载作用时梁、拱荷载分承比的求解公式。以实桥实测值验证了该梁拱荷载分担比例,并通过改变结构参数进一步验证了公式的精度;分析了基于挠度的梁拱荷载分承比的影响因素。基于挠度的梁拱组合桥梁梁拱荷载分担比例能够利用易测量的跨中挠度进行计算,可以衡量梁拱作用机理,对于掌握实桥的梁拱荷载分担比例具有一定的参考价值。
In this paper,the load sharing ratio of the continuous-beam-arch combined bridge is defined by the mid-span deflection of the continuous-beam-arch combined and continuous beam which have same span and section.The formula of load sharing ratio based on deflection is deduced by mechanical method beam-to-arch in mid-span uniform load.The accuracy of the formula is verified by changing the structural parameters,and the influence factors of the load sharing ratio of the continuous-beam-arch are analyzed.The load sharing ratio of the composite bridge based on the deflection can be calculated by using the mid-span deflection of the actual bridge.It can measure the working mechanism of the real bridge,which has certain reference value for grasping the load sharing ratio of the bridge.
作者
夏文传
陈权
Xia Wenchuan;Chen Quan(Key Laboratory of Road & Bridges and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China;National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control,Lanzhou Jiaotong University, Lanzhou 730070, China)
关键词
膜张力
梁拱组合
荷载分担比例
film tension
beam arch combination
load sharing ratio
