支撑型式与钢框架结构的侧移刚度  

TYPES AND LAYOUTS OF BRACING AND THEIR EFFECTS ON LATERAL STIFFNESS OF STEEL-FRAME STRUCTURES

作　　者：高轩能[1] 江媛[1] 彭观寿[1] 张惠华[1] 

机构地区：[1]华侨大学土木工程学院,福建泉州362021

出　　处：《工程力学》2010年第A01期280-285,共6页Engineering Mechanics

基　　金：福建省科技计划重点项目(2006H0030);厦门市科技计划项目(3502Z20073036);国务院侨办科研基金项目(07QZR04)

摘　　要：通过计算不同支撑类型和布置方式下钢框架结构的顶层最大位移,研究了支撑布置型式对多层、高层钢框架结构侧向刚度的影响。结果表明:对于不同的支撑类型,沿竖向集中布置于中间两个跨间以上的钢框架支撑结构的侧向刚度优于将支撑布置在边跨和其他跨间上;对于相同的支撑布置方式,在钢框架结构的侧向刚度和经济性方面,不论是中心支撑还是偏心支撑形式,人字形支撑均优于单斜杆支撑。建议在多层、高层钢框架支撑结构中,尽可能选择人字形支撑并沿框架竖向集中布置于中央跨间;在中小地震烈度设防地区,优先采用人字形中心支撑体系,而在强地震烈度设防地区,应优先采用人字形偏心支撑体系。This paper researched the influence of bracing kinds on lateral stiffness of multi-storey and high-rise braced steel-frames through calculating the biggest sidesway of the top-storey of a steel-frame braced by different types and layouts of bracing.The results show that,for different kind of bracings,the lateral stiffness of a steel frame with bracing in central spans is higher than that in side spans or other spans;for the same layout of bracing,either centrically or eccentrically braced,the herringbone bracing is better than one-way diagonal bracing in lateral stiffness and economy of the braced steel-frames.The paper suggests that,for multi-storey and high-rise braced steel-frames,the herringbone bracing should be selected and be set on middle spans as possible.The paper also points out that the centrically herringbone bracing should be preferably employed in a small and middle seismic design intensity region but the eccentrically herringbone bracing should be firstly used in a macro-seismic design intensity region.

关 键 词：钢框架结构 支撑布置型式 侧向刚度 层间位移 顶层侧移 

分 类 号：TU323.5[建筑科学—结构工程]