Comparative analysis on seismic performance of high strength steel composite K-shaped eccentrically braced frames

被引：0

作者：

Tian X. ^{[1
]}

Su M. ^{[2
]}

Yang S. ^{[1
]}

Li S. ^{[1
]}

机构：

[1] School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an

[2] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 10期

关键词：

Dynamic time-history analysis; Eccentrical brace; High-strength steel; Rotation angle of link; Seismic performance; Steel frame structure;

D O I：

10.14006/j.jzjgxb.2019.0035

中图分类号：

学科分类号：

摘要：

To study the seismic performance of high-strength steel composite K-shaped eccentrically braced frames (K-HSS-EBFs) with steels of varying strengths, three 5-story K-HSS-EBFs with different combinations of steel strength were designed with Q345-5, Q460-5, and Q690-5 steels. The dynamic time-history analysis was performed using 10 seismic ground motions. The rotation angles of links and inter-story drift ratio of the samples at different levels of earthquake were obtained. The results show that under 8-degree rare earthquakes, the inter-story drift ratio of the K-HSS-EBFs is larger than that of the conventional K-shaped EBF, and the links of all samples enter the plastic deformation stage. When the plastic inter-story drift ratio reaches the specification limit, the frame beams of Q460-5 begin to enter the plastic deformation stage. In contrast, the frame columns, frame beams and braces of Q690-5 are found to be in the elastic deformation stage for such earthquakes and can withstand greater seismic action. In the limit state, compared with the conventional K-shaped EBF, the seismic impact that the structure could withstand and the link rotation angle obtained with Q460-5 are smaller, while in the case of the Q690-5 samples, they are larger. © 2020, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：42 / 49

页数：7

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