论文部分内容阅读
针对装配式斜支撑节点钢框架结构桁架梁杆件数量多、难于结构计算的问题,提出一种简化计算方法,将钢桁架梁根据等刚度、等高度、等翼缘的原则等代为实腹型工字钢梁。分别考虑简支梁施加均布线荷载、简支梁施加跨中集中荷载、悬臂梁施加均布线荷载和悬臂梁施加自由端集中荷载四种边界条件,反算得到5组等代梁截面。采用SAP 2000建立起一栋20层的装配式斜支撑节点钢框架建筑的实际结构计算模型和等代模型进行结构分析,对模态周期、层位移、层间位移角、剪重比、刚重比等关键指标进行对比。结果表明:采用简支梁施加均布线荷载边界条件反算得到的等代模型计算结果与实际模型最为吻合,可用于装配式斜支撑节点钢框架结构及类似结构的整体分析和设计。
Aiming at the problem that the number of truss girder members in fabricated steel frame structure is too large and the structural calculation is difficult, a simplified calculation method is proposed. The steel truss girder is based on the principle of equal stiffness, equal height, I-beam. Considering four kinds of boundary conditions, that is, the uniform load applied by simply supported beams, the concentrated load applied by simply supported beams, the uniformly distributed load exerted by cantilever beams and the free-end concentrated load applied by cantilever beams respectively, five equivalent beam sections are obtained. The actual structural calculation model and equivalent model of a 20-story fabricated skew-supported steel-framed building with SAP2000 were established to analyze the structure, and the influences of modal period, layer displacement, interlayer displacement angle, shear weight ratio, Than the other key indicators for comparison. The results show that the calculated results of the equivalent model obtained by the simple calculation of the load distributions of the uniformly distributed load on the simply supported beam are in good agreement with the actual ones, and can be used for the overall analysis and design of the steel frame structure and its similar structures.