摘要
基于等效连续化方法给出了框筒结构剪力滞系数,通过对结构高度、平面形状、角柱面积、跨高比等影响剪力滞的主要因素分析,探讨了减小剪力滞的有效方法。再利用优化原理,寻求梁柱的合理跨高比使得剪力滞效应达到最小,以便充分发挥框筒结构的空间整体性能,进而确定梁柱的合理截面高度及合理开洞率。给出了计算图表及计算步骤,并结合具体算例,验证了优化后的剪力滞系数较优化前明显减小。结果表明:该方法简单、实用,可供初步设计使用。
Shear lag coefficient in framed tube structures was put forward based on the equivalent continuous system method. According to the analysis of the main influence factors on shear lag such as structural height, plane shape, area of corner column, and the ratio of span to height, the valid ways to reduce shear lag were discussed. In order to make the shear lag effect minimum and take full of structural space overall function, the reasonable ratio of span to height was studied using the optimal principle, and the reasonable section height and hole rate can be obtained. Some diagrams were given, and an example was taken to find that the shear lag coefficient became less obvious after the optimization. It is shown that this method is accurate and convenient enough for use during the preliminary stage of design.
出处
《建筑科学与工程学报》
CAS
2005年第3期16-19,共4页
Journal of Architecture and Civil Engineering
关键词
框筒结构
等效连续体系
剪力滞
梁柱截面
合理高度
framed tube structure
equivalent continuous system
shear lag
section of beam and column
reasonable height
