支撑布置对钢结构影响的试验及数值研究

进行试验及数值研究,分析支撑布置对钢结构动力特性的影响。土耳其工业大学土木工程实验室对某缩尺为1:2的3层钢结构模型,进行一系列环境振动试验,研究无支撑及有支撑框架的模态。分析了4种支撑形式:交叉型,倒V字型,V字型,K字型支撑。通过频域分解法,确定各阶自振频率、振型及阻尼比。建立有限元模型,对结构动力性能进行数值模拟。对比无支撑框架与有支撑框架动力特性的不同,分析支撑布置的影响。以试验结果为标准,揭示了试验及有限元结果的不同。研究表明:通过设置支撑,可提高钢结构刚度,支撑的影响大小取决于支撑布置,交叉型支撑对刚度的提高作用最大。数值结果比试验结果偏大,故必须对初始有限元模型进行一定改进。

Experimental and Numerical Investigation of Brace Configuration Effects on Steel Structures

The study is concerned with the experimental and numerical investigations of brace configurations on steel buildings in terms of dynamic characteristics.A three-storey steel building model with 1/2 scale of a real building,which was constructed at the laboratory of Civil Engineering Department of Karadeniz Technical University,was selected for investigations.A series of ambient vibration tests were conducted on the building model for bare frame and braced cases.Four different brace types were applied to the...