Full Text:   <1104>

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CLC number: TU391

On-line Access: 2015-10-01

Received: 2014-10-25

Revision Accepted: 2015-06-17

Crosschecked: 2015-09-26

Cited: 4

Clicked: 1685

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Zi-qin Jiang

http://orcid.org/0000-0001-9613-3972

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Journal of Zhejiang University SCIENCE A 2015 Vol.16 No.10 P.781-792

10.1631/jzus.A1400325


Design method of the pinned external integrated buckling-restrained braces with extended core. Part I: theoretical derivation


Author(s):  Zi-qin Jiang, Yan-lin Guo, Xiao-an Wang, Bin Huang

Affiliation(s):  1College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; more

Corresponding email(s):   jzqbj2010@163.com

Key Words:  External integrated buckling-restrained brace (BRB), Core single-wave overall deformation, Contact force distribution, Strengthened core region (SCR), Strength design criteria


Zi-qin Jiang, Yan-lin Guo, Xiao-an Wang, Bin Huang. Design method of the pinned external integrated buckling-restrained braces with extended core. Part I: theoretical derivation[J]. Journal of Zhejiang University Science A, 2015, 16(2): 781-792.

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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1400325"
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A1 - Zi-qin Jiang
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Abstract: 
The contact force distribution between the core member and the external member of a buckling-restrained brace (BRB) is closely related to its deformation mode, and it directly affects the working state of the extended core and external restraining member. This study focuses on a pinned BRB with extended core as a research object and investigates the stress state of a BRB. Based on the specified core deformation modes and contact force distributions, the contact force and the bending moment distribution in the external member are deduced. Lastly, by considering the mechanical characteristics of the external member and extended strengthened core region (ESCR), their strength design criteria are established. In the theoretical derivation of the design method, the influence of some parameters is considered, including the initial geometrical imperfection of the external member, the gap between the core and the external member, the rigidity reduction of the restrained strengthened core region (RSCR), and the change of contact position. Finite element numerical verification of the corresponding theoretical derivation is discussed in detail in another paper as Part II (Jiang et al., 2015).

This paper investigates the contact force distribution between the core member and the external member of a buckling-restrained brace (BRB). Based on the specified core deformation modes and contact force distributions, the contact force and the bending moment distribution in the external member are obtained. Finally, some design criteria are established.

内核外伸铰接防屈曲支撑设计理论研究. 第一部分:理论推导

目的:研究内核外伸的铰接防屈曲支撑的受力状况。
方法:在假定内核对外围约束构件挤压力分布模式后,建立内核外伸加强段和约束加强段的平衡方程,并结合内核与外围约束构件之间的变形协调关系求解出内核外伸段上最不利弯矩、内核挤压力及外围约束构件上的弯矩分布。基于外围约束构件及内核外伸加强段的受力特点建立外围约束构件设计准则和内核加强段设计 准则。
结论:设计准则可以有效地预测支撑整体失稳破坏和内核外伸加强段折曲破坏。

关键词:防屈曲支撑;内核单波整体变形;挤压力分布;内核构件加强段;设计准则

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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