跨度128m系杆拱桥模型试验研究  

Model test study for 128 m span tied arch bridge

作　　者：杜迎东 王起才[1] 于本田[1] 毛东 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]中铁二十局集团第二工程有限公司,北京100142

出　　处：《铁道建筑》2015年第9期18-20,共3页Railway Engineering

基　　金：长江学者和创新团队发展计划项目(IRT1139);铁道部科技研究开发计划项目(2012G011-A)

摘　　要：为预测待建系杆拱桥系梁挠度变化规律，依据相似原理制作了1∶16全尺寸缩尺模型。试验分析了全尺寸模型在吊杆张拉阶段各主要位置的挠度变化，对比分析了模型试验和实际桥梁在相同工况、相同位置处的挠度值。结果显示模型与实桥经换算在相同工况、相同位置处挠度误差在3％～8％，由此验证了缩尺模型的合理性，可用于待建桥梁相应位置挠度预测，从而保证成桥线形，使其满足设计要求。A 1∶16 scale model of a tied arch bridge was built,based on the similarity priciple,to predict its beam def lection.The def lections of signif icant members were tested during derrick tension.The def lection of the model and that of the real bridge were compared,both of which were under the same loading condition.The results indicate that the difference is between 3%~8%,validating the rationality of the bridge model.This model may be used to predict def lection of the pending bridge,improving bridge construction to satisfy the dimension requirement of bridge design.

关 键 词：系杆拱桥 挠度变化规律 模型试验 相似原理 

分 类 号：J448.225[艺术—摄影艺术]