超高层钢筋混凝土框筒结构动力特性的振动测试
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摘要
通过高灵敏度拾振器拾取结构在外界激励下的动力响应,可对结构健康状况作出相关判断。介绍了振动测试原理和信息模态识别方法。以钢筋混凝土框筒结构的某大厦(高度为127.9m)为例,进行了测试,采样点数达54000个。依据测试结果,与计算结果作了对比,可以看出模型计算所得结构自振周期大于实测法。究其原因,是房屋填充墙对整体刚度作了贡献。
The structure health condition would be judged by a high-sensitivity vibration pickup , which could pickup the structure dynamic response to external-excitation. The principle of vibration testing and the recognition method of information mode were introduced in this paper. Taking a 127.9 m mansion with reinforced concrete framed-tube structure as the example, the number of sampling points arrived at 54 000. Then, the test result being compared with the computing result, it showed natural vibration period by model computing was longer than that by actual measurement. It was the building infilled wall that helped the total stiffness to a large extent.
The structure health condition would be judged by a high-sensitivity vibration pickup , which could pickup the structure dynamic response to external-excitation. The principle of vibration testing and the recognition method of information mode were introduced in this paper. Taking a 127.9 m mansion with reinforced concrete framed-tube structure as the example, the number of sampling points arrived at 54 000. Then, the test result being compared with the computing result, it showed natural vibration period by model computing was longer than that by actual measurement. It was the building infilled wall that helped the total stiffness to a large extent.
引文
[1]施卫星,马秋玲.结构振型脉动测试方法的应用[J].振动与冲击,2006,25(S).
[2]GB50009-2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2001.
[3]王宁,李振宝,闫维明.复杂建筑动力特性脉动测试与分析[J].工业建筑,2007(S1).
[4]温瑞智,胡进军,周正华.基于环境振动测试的高层钢筋混凝土结构模态参数识别[J].地震研究,2008,31(3):250-273.
[5]李斌,卢文胜,沈剑浩,等.高层建筑结构动力特性测试实例分析[J].结构工程师,2006,22(2):63-72.
[2]GB50009-2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2001.
[3]王宁,李振宝,闫维明.复杂建筑动力特性脉动测试与分析[J].工业建筑,2007(S1).
[4]温瑞智,胡进军,周正华.基于环境振动测试的高层钢筋混凝土结构模态参数识别[J].地震研究,2008,31(3):250-273.
[5]李斌,卢文胜,沈剑浩,等.高层建筑结构动力特性测试实例分析[J].结构工程师,2006,22(2):63-72.
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