梁拱组合体系桥施工监控  

Monitoring of Beam-Arch Combined Bridge for Its Construction

作　　者：龙湘敏[1] 

机构地区：[1]铁道第五勘察设计院,北京102600

出　　处：《北方交通》2007年第8期40-43,共4页Northern Communications

摘　　要：以北京通州北运河大桥为例,介绍了五跨带体外索梁拱组合体系桥的特点,并阐述了此类桥梁施工监控的目的、要点及方法。通过建立有限元模型进行施工模拟,分析了不同施工方案的优缺点,根据实测数据和理论计算结果,分析了日照温差和季节温度变化及其作用下主跨3个关键截面的应力变化规律。施工过程中,温度作用对该梁拱组合体系桥结构受力影响较大,温度效应应引起足够重视。As example with Tongzhou North Canal Bridge, the paper introduces the beam -arch combined bridge of five - span and with external prestressed cable, expounds yet the purpose, essentials and methods for monitoring the construction of this type of bridge, Through simulation of construction with finite element model, the paper analyses merits and demerits of different construction schemes. Based on measured data and theoretical computaanalyzes still the stress changing law of main span＇s three key sections under temp defferences in sunlight and seasons. In the course of construction, the temp has a bigger impact on load - beating of beam - arch combined bridge, so it should be to attach an importance enough to temp effect.

关 键 词：梁拱组合体系桥 施工监控 体外预应力 施工方案 温度 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]