- 54 - http://www.ivypub.org/cet Civil Engineering and Technology September 2013, Volume 2, Issue 3, PP.54-60 Research on Loading Test of Double-curved Arch Bridge Yonggang Gou 1 , Shengquan Liang 1 , Fengnian He 1 , Feng Yang 1 , Yaofang Wan 2 , Zhimeng Shi 3 † 1. Yidu Highway Administration, Yidu 443300, China 2. Yidu Highway Construction Development Co, Ltd, Yidu 443300, China 3. Wuhan University of Technology, School of Transportation, Wuhan 430063, China † Email: [email protected]Abstract The deflections and strains of the tested bridge, a three double-curved arch bridge targeted to the loading experiment, are investigated in the equivalent loads of each control section; meanwhile the dynamic parameters including vibration and modes are examined to evaluate the maximum bearing capacity of bridge structure. Based on the existing evaluation method on the bridge bearing capacity, the performance and carrying capacity of the bridge are assessed, which is of great reference value to the kind bridge design and loading test. Keywords: Double-curved Arch Bridge; Loading Test; Load Carrying Capacity 双曲拱桥荷载试验分析 笱永刚 1 ,梁圣全 1 ,何丰年 1 ,杨锋 1 ,万尧方 2 ,施志萌 3 1. 宜都市公路局,湖北 宜都 443300 2. 宜都市中路建设开发有限公司,湖北 宜都 443300 3. 武汉理工大学,湖北 武汉 430063 摘 要:通过一座三跨双曲拱桥的荷载试验,测试桥梁在等效荷载作用下各控制截面的挠度值及应变值,同时测试了自 振频率和模态动力参数,检验桥跨结构的实际承载能力。参照现有桥梁承载力评估方法,对该桥整体受力性能和和承载 能力做出了评价,该研究方法可供同类型桥梁设计以及荷载试验参考。 关键词:双曲拱桥;荷载试验;承载能力评估 前言 桥梁荷载试验一般分为静载试验与动载试验,通过对桥梁结构的直接加载,了解桥梁结构在实验荷载作 用下的实际工作状态,进而对桥梁结构的安全性进行评估 [1-3] 。静载试验是通过测试桥梁结构在试验荷载作用 下控制截而的应变、位移来分析判定桥梁的承载能力。动载试验是通过测试桥梁在动载作用下的响应,分析 桥梁的频率和振型等模态参数,根据动力响应和模态参数进行桥梁承载能力的评定 [4] 。 1 工程概况 聂河大桥位于 X218 县道宜都市境内,是当地重要的双曲拱桥,桥面全宽 9.44m,桥梁全长 108.204m, 跨径布置为 25m+32.5m+25m。该桥主要技术标准为:荷载等级:汽-15,人群荷载: 2.5kN/m 2 ;桥面宽: 0.18m (护栏)+1.00m(人行道)+7.00m(行车道)+1.00m(人行道)+0.18m(护栏)。 2 有限元计算分析 对该双曲拱桥建模计算,计算模型如图 1 所示。选取第一跨(边跨)作为试验跨,并且作出如下假设:
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Research on loading test of double curved arch bridge
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- 54 -
http://www.ivypub.org/cet
Civil Engineering and Technology
September 2013, Volume 2, Issue 3, PP.54-60
Research on Loading Test of Double-curved
Arch Bridge Yonggang Gou
1, Shengquan Liang
1, Fengnian He
1, Feng Yang
1, Yaofang Wan
2, Zhimeng Shi
3†
1. Yidu Highway Administration, Yidu 443300, China
2. Yidu Highway Construction Development Co, Ltd, Yidu 443300, China
3. Wuhan University of Technology, School of Transportation, Wuhan 430063, China