钢管混凝土拱桥结构动力荷载试验分析

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[摘要]介绍了某钢管混凝土拱桥动力荷载试验过程,并对试验数据进行分析,试验结果显示试验边跨汽车
中击效应十分显著.且与车速有明显的相关性,汽车动荷载作用下,拱肋结构的动力响应性能异常，需引高度重
视,建议采取有效的措施对边跨主拱圈及垫梁等部位的开裂情况进行定期检查,希望本工程相关经验能为同类工
程提供借鉴。
[关键词]拱桥；动力荷载试验；有限元分析；监测
[中图分类号] U448.22
[文献标识码] A
[文章编号] 1674-0610（2012）03-0106-05
Dynamic loading test analysis of one Concrete-filled
steel tube arch bridge
LIU Wufei
( Human Communications Rearch Institute, Changsha, Hunan 41000,China)
[ Abstract] Firstly some concrete flled steel tube arch bridge dynamic loading test process is intro
duced. And the test data is analysed. The results show that automobile shock effect of the testing side is
very notable, and it has obvious corelation with speed. Under automotive dynamic loading, the dynamic
response of the arch rib structure is anomalous, which needs to be pay more attention The crack situa-
tion of the sidespan main arch ring and mat beam is advised to take effective measures periodically. The
relevant experience of this engineering may provide a reference for similar projects.
[ Key words] arch bridge; dynamie loading finite elememt anitoring
力混凝土 T梁。桥面标准全宽34m,其组成为:5m
1 概述
（人行道）+24 m（双向六车道）+5m（人行道）;桥
某大桥总长410.5m,主桥大致与河道正交,采
梁墩台均采用重力式结构,基础形式除1#墩采用桩
用三墩两台形式跨越沱江主河道,由三孔（100m+
基础外,其余墩台均采用刚性扩大基础。桥梁设计
142.56m+100m）混合式连续拱桥形成主体结构
荷载:城-A级＋人群荷载(3.5 kN/m³)。为了测定
（见图 1）。主体结构中孔采用中承式钢管混凝土拱
桥梁结构的动力特性和动力响应,评价桥梁的动力
桥,两边孔采用上承式钢筋混凝土箱形肋拱桥，三孔
特性,对该桥进行了相应的动力荷载试验,本文则重
拱桥横向均采用两片拱肋;立交孔采用装配式预应
点探讨100m跨引桥的动力荷载试验。