大跨度网格状门式刚架结构及其受力性能研究  

Long-span lattice portal frame and its structural behavior

作　　者：邓华[1] 姜群峰[1] 张明山[1] 

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310027

出　　处：《建筑结构学报》2005年第2期26-33,共8页Journal of Building Structures

摘　　要：网格状门式剐架结构是结合了立体桁架结构和门式刚架结构受力优点而衍生的一种大跨度结构形式。本文的讨论 基于该结构形式在一个72m跨度、刚架间距为15m的结构中的工程应用。作为一种以平面受力为主的结构形式,文中阐 述了其结构布置的一般原则,特别是纵、横向抗侧力系统设置的必要性。由于横梁与柱的协同工作,静力性能分析表明该 结构跨中内力和变形可大幅度降低,跨越能力增强。文中讨论了该类结构抗震设计的一般原则,考察了结构在纵向水平、 横向水平以及竖向地震作用下的抗震性能。对各向地震响应,比较了分别采用反应谱法和《建筑抗震设计规范》(GB 50011-2001)简化方法进行计算的数值差异。文中最后讨论了梁柱交界区、柱脚区以及屋面支撑系统中构件和节点设计 的相关问题。Derived from an effective combination of space truss and portal frame, a novel long-span structure named lattice portal frame (LPF) is put forward. Unexpected spanning capability of LPF is found in practical design of an entrance hall with a span of 72 m and frame spaces of 15 m, and stimulates further discussions. General principle of LPF's reasonable structural layout is suggested. As a kind of planar frame, the necessity of longitudinal and lateral bearing system in LPF is stressed. Because of the synergism between column and girder, structural static behavior reveals that the mid-span internal forces and deflection of girder can decrease greatly, thus LPF's potential for long-span building is obtainable. Basic outlines for the aseismic design of LPF are discussed as well. Aseismic capabilities of LPF respectively in longitudinal horizontal, lateral horizontal and vertical directions are further investigated. Numerical differences of seismic responses calculated by response spectrum method and simplified methods (suggested in China Code GB 50011-2001) are also compared respectively, relating to above three directions. In the end, design of joints and members in areas of girder-column intersection, column base and roof braces is introduced.

关 键 词：门式刚架结构 网格状 大跨度 性能研究 《建筑抗震设计规范》 结构形式 结构抗震设计 竖向地震作用 一般原则 结构受力 桁架结构 工程应用 结构布置 系统设置 协同工作 静力性能 跨越能力 纵向水平 抗震性能 地震响应 反应谱法 

分 类 号：TU328[建筑科学—结构工程] TP333.35[自动化与计算机技术—计算机系统结构]