摘要
基于纯钢框架结构及钢框架—支撑结构的受力特点,提出新的结构形式——预应力巨型支撑—钢框架结构体系。采用SAP2000建立不同结构尺度的二维结构模型,变化框架相对抗侧刚度,进行几何非线性有限元分析,并与纯钢框架结构、非预应力巨型支撑—钢框架结构比较,着重研究预应力巨型支撑—钢框架结构的侧移模式,结果表明预应力巨型支撑可以显著提高结构的抗侧刚度;预应力巨型支撑—钢框架结构侧移模式具有弓形特征,钢框架相对抗侧刚度越小,弓形特征越明显;高层预应力巨型支撑—钢框架结构侧移模式呈现多个弓形串联特征,串联节点正是预应力巨型支撑锚固位置所在。
Based on steel frame structure and frame-brace structure,prestress-mega-braced steel frame was presented.Its two-dimensional models with different structural dimensions in SAP2000 were set up for geometrical nonlinear analysis.As compared with frame structure and non-prestress-mega-braced frame,emphasis is placed on the displacement mode of the prestress-mega-braced steel frame.The results indicate that the prestressed mega-brace can improve the lateral stiffness of the steel frame structure efficiently;the displacement mode of prestress-mega-braced steel frame structure shows bow shape,and the less the relative lateral stiffness of frame,the more evident the bow shape;the displacement mode of tall prestress-mega-braced frame structure shows a series of bow shapes,and the turning joint is the end of mega brace.
出处
《建筑科学》
北大核心
2010年第9期57-61,共5页
Building Science
基金
国家自然科学基金项目(50948035)
江苏省自然科学基金项目(BK2009723)
关键词
预应力钢结构
巨型支撑
框架结构
侧移模式
prestressed steel structure
mega brace
frame structure
displacement mode
