Method of determining effective length factor of column within frame-corewall structures

被引：0

作者：

Fan Z. ^{[1
]}

Xu Y. ^{[1
,2
]}

Mu Z. ^{[2
]}

Liu T. ^{[1
]}

Han W. ^{[1
]}

Wu H. ^{[1
]}

机构：

[1] China Architecture Design and Research Group, Beijing

[2] School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷

关键词：

buckling load; effective length factor; finite element analysis; frame-corewall structure; simplified method;

D O I：

10.14006/j.jzjgxb.2023.S1.0004

中图分类号：

学科分类号：

摘要：

In order to determine the effective length factor of column within frame-corewall structures reasonably, the effective length factor of the column can be obtained based on the buckling load of the frame in the weak axis direction using the cooperative working mechanism of peripheral trusses. Further considering the supporting effect of the core on the surrounding frame, the calculated length coefficients were corrected by amplification factor. By applying a concentrated load on the top of standard floor of the frame structure, the calculated length coefficient remained unchanged within the same standard floor, which was consistent with the GB 50017—2017 ‘Design standard for steel structures’. The effects of structural height, loading mode and other factors on buckling mode, buckling load and effective length coefficient were investigated through four structural models with height of 60 m, 90 m, 120 m and 150 m. The results show that the first buckling mode of the frame-corewall models is the deformation in the weak axis direction, and no local instability of the columns occurs outside the frame plane. According to the story buckling method, the effective length coefficient of the frame column is close to that calculated by the standard story loading form within finite element model, with an error of - 9. 59% -6. 49% . The buckling load of peripheral frame of frame-corewall structure is significantly higher than that of the peripheral frame analytical model, the increment of buckling load of peripheral frame decreases gradually with the increase of structure height. The effective length coefficient of the peripheral column obtained by the simplified method is in good agreement with the result of the finite element analysis based on the standard story loading form. © 2023 Science Press. All rights reserved.

引用

页码：26 / 37

页数：11

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