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利用SAP2000建立不同几何参数的高层斜交网格筒结构模型,在水平风荷载作用下对其进行弹性分析。介绍了高层斜交网格筒结构的剪力滞后现象与基本特点,研究了高层斜交网格筒结构在水平荷载作用下剪力滞后效应的产生机理,并与框筒结构的剪力滞后效应进行对比。分析了斜柱角度、主环梁跨高比、结构高宽比、结构长宽比以及有无角柱对高层斜交网格筒结构剪力滞后效应的影响。结果表明:与框筒结构相比,斜交网格筒结构剪力滞后效应较小;在侧向刚度最优区间内斜交网格筒结构底层剪力滞比随斜柱角度的增大而增大,当斜柱角度超过约80°时,随着斜柱角度的增加底层剪力滞比迅速增大;斜交网格筒结构高宽比越大,结构底层剪力滞比越小;斜交网格筒结构长宽比越大,结构底层剪力滞比越大,剪力滞后效应越明显。
SAP2000 was used to establish a high-level skewed grid structure model with different geometric parameters, and the elastic analysis was carried out under horizontal wind load. The phenomenon of shear lag and basic characteristics of high-skewed grid structure are introduced. The mechanism of shear lag effect under high-level skewed grid structure under horizontal load is studied, and the relationship between shear lag effect of frame structure and shear lag effect comparing. The effect of inclined column angle, span ratio of main ring beam, aspect ratio of structure, aspect ratio of structure and the presence or absence of corner column on the shear lag effect of high skewed grid structure are analyzed. The results show that the shear lag effect of the skewed grid structure is smaller than that of the frame structure. The shear lag ratio of the bottom skewed grid structure increases with the angle of the skew column in the optimal range of lateral stiffness When the angle of the inclined column exceeds about 80 °, the shear rate of the bottom layer increases rapidly with the angle of the inclined column increasing. The larger the aspect ratio of the skewed grid structure is, the smaller the shear lag ratio of the bottom of the structure is. The larger the aspect ratio of the skewed grid structure, the larger the shear lag ratio of the bottom of the structure, the more obvious the effect of the shear lag.