【摘要】 推导了斜交网格筒结构单元体的抗剪刚度、抗弯刚度以及竖向刚度的计算公式。通过连续化变形分析方法,给出了该类结构在三种典型荷载作用下的水平位移简化方法及其等效抗侧刚度。分析了结构体系的层间位移组成,给出了受力层间位移在弹性和弹塑性阶段的简化计算方法。采用PERFOR-3D软件分析了该类结构体系的层间位移和受力层间位移沿结构高度的变化规律,并进行了参数分析。结果表明:斜交网格筒结构体系的层间位移和受力层间位移沿结构高度方向均呈现先增大后减小的趋势;层间位移和受力层间位移最大值所在位置不同,且受力层间位移随楼层高度增加,其所占的比例逐渐下降,最大比例约为80%,建议同时考虑受力层间位移角和层间位移角作为该类结构的变形控制指标。斜柱角度、斜柱截面、主环梁跨数以及结构高宽比均对结构的层间位移有较大影响;而对于受力层间位移,斜柱角度和斜柱截面对其影响较大,主环梁跨数以及结构高宽比对其影响较小。更多还原

【Abstract】 In this paper,the formulas for calculating the shear stiffness,flexural stiffness and vertical stiffness of skewed lattice tube element were deduced. For diagrid tube structure,the simplified calculation method of lateral displacement under three kinds of typical loads and the calculation formula of equivalent lateral stiffness were established based on the successive deformation method. The compositions of story drift of diagrid tube structure were analyzed. The simplified calculation method under elastic and elastic-plastic phase was given. The finite element software PERFORM-3D was used to analyze the variation of story drift and physical story drift along the structural height. Parametric analysis was carried out. The results show that the story drift and the physical story drift of diagrid tube structure tend to increase at first and then decrease along the height direction. The maximum story drift and maximum physical story drift present at different stories. With the increasing of structural height,the proportion of physical story drift gradually decreases with the maximum value of about 80%. Therefore,it is suggested that both the physical story drift and story drift should be considered as the deformation controlled index of this kind of structure.The angle and cross section of the oblique column,the span number of the main ring beams and structural aspect ratio have great influence on the story drift of structures. The angle and cross section of the oblique column have great influence on the physical story drift. The impact of span number of main ring beam and structural aspect ratio is small.更多还原