|Table of Contents|

[1] Yang Xiaoyan, Wu Jing, Pang Xixi, Wang Qiang, et al. Higher mode effects in hinged wall with BRBsin base-frame structures using distributed parameter models [J]. Journal of Southeast University (English Edition), 2020, 36 (1): 56-66. [doi:10.3969/j.issn.1003-7985.2020.01.008]
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Higher mode effects in hinged wall with BRBsin base-frame structures using distributed parameter models()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
36
Issue:
2020 1
Page:
56-66
Research Field:
Civil Engineering
Publishing date:
2020-03-20

Info

Title:
Higher mode effects in hinged wall with BRBsin base-frame structures using distributed parameter models
Author(s):
Yang Xiaoyan1 Wu Jing1 Pang Xixi2 Wang Qiang3 Zhang Meng4
1Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 211189, China
2Xuzhou Survey and Design Center, State Grid Economic and Technological Research Institute Co., Ltd., Xuzhou 221005, China
3Hong Kong Huayi Design Consultants(Shenzhen)Ltd., Shenzhen 518057, China
4Baosheng Integrated System Technology Co. Ltd., Baoying 225000, China
Keywords:
hinged wall higher mode effects flexural beam rotational spring rotational stiffness ratio
PACS:
TU352.1
DOI:
10.3969/j.issn.1003-7985.2020.01.008
Abstract:
To investigate the effect of higher modes on the displacement and inner forces in HWBB(hinged wall with buckling-restrained braces in base)-frame structure, distributed parameter models for both the HWBB-hinged frame structure and the HWBB-MRF(moment resisting frame)structure are built. The hinged wall is simplified as a flexural beam. BRBs(bucking-restrained braces)are simplified to a rotational spring. MRF is simplified to a shear beam. Vibration equations of distributed parameter models are derived. Natural periods, natural modes of vibration, inner forces and displacements of the distributed parameter models are derived based on the vibration equations using numerical methods. The effect of the relative stiffness ratio and the rotational stiffness ratio on the higher mode effects is investigated. For elastic structures, the global displacement and shear in MRF are predominantly controlled by the first mode, while the shear and bending moment in the wall are significantly affected by higher mode effects. The effect of the yielding of BRB on the inner forces distribution in the HWBB-hinged frame is investigated. The results indicate that the first mode will no longer contribute to the inner forces and the contribution from higher modes to inner forces increases after the BRBs yield. Displacement is not sensitive to higher mode effects and it is controlled by the first mode after the BRBs yield. Parameter analysis demonstrates that the displacement amplitudes are reduced with the increase in the flexural stiffness of the wall before the flexural stiffness reaches a certain value. The first three periods decrease with the increase in the rotational stiffness. With the increase in the rotational stiffness ratio, the contribution from the first mode decreases while contributions from both the second mode and third mode increase.

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Memo

Memo:
Biographies: Yang Xiaoyan(1990—), female, Ph.D. candidate; Wu Jing(corresponding author), male, doctor, professor, seuwj@seu.edu.cn.
Foundation items: The National Key Research and Development Program of China(No.2018YFC0705802), the National Natural Science Foundation of China(No.51978165), the Fundamental Research Funds for the Central Universities(No.3205007720), Postgraduate Research and Practice Innovation Program of Jiangsu Province(No.3205007720).
Citation: Yang Xiaoyan, Wu Jing, Pang Xixi, et al.Higher mode effects in hinged wall with BRBs in base-frame structures using distributed parameter models[J].Journal of Southeast University(English Edition), 2020, 36(1):56-66.DOI:10.3969/j.issn.1003-7985.2020.01.008.
Last Update: 2020-03-20