[1] Wang Fan, Lan Xiaoyi, Pan Xiaorong, et al. Strength calculation methodologyfor internally ring-stiffened DT-joints [J]. Journal of Southeast University (English Edition), 2016, 32 (1): 67-72. [doi:10.3969/j.issn.1003-7985.2016.01.012]

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Strength calculation methodologyfor internally ring-stiffened DT-joints()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

32

Issue:

2016 1

Page:

67-72

Research Field:

Civil Engineering

Publishing date:

2016-03-20

Info

Title:

Strength calculation methodologyfor internally ring-stiffened DT-joints

Author(s):

Wang Fan¹;  2;  Lan Xiaoyi²;  Pan Xiaorong²;  3;  Ning Chen²Xu Xiaofeng²;  Liu Dingding²;  Luo Zhifeng²

¹State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China
²Architectural Design and Research Institute, South China University of Technology, Guangzhou 510640, China
³Shanghai Municipal Engineering Design Institute(Group)Co., LTD, Shanghai 200092, China

Keywords:

double-tee joint;  ring-stiffener;  failure mechanism;  ultimate strength

PACS:

TU391

DOI:

10.3969/j.issn.1003-7985.2016.01.012

Abstract:

In order to obtain the strength design equations for internally ring-stiffened circular hollow section tubular DT(double tee)-joints subjected to brace axial compression or tension, theoretical and numerical studies on 800 stiffened joints were conducted. Based on the failure mechanism of the stiffened joints, four theoretical models and corresponding equations for predicting the strength of the stiffeners are proposed. Combined with existing unstiffened DT-joint design equations, a design equation for the stiffened joints is proposed. The finite element analysis shows that the failure of the stiffened joints under brace axial loads can be characterized by plastic hinges forming in the stiffener and chord wall yielding in the vicinity of the brace-chord intersection. The reliability of the proposed stiffener strength equations is demonstrated by a reliability analysis. Good agreement is achieved between the stiffened joint strength calculated from the proposed joint strength equation and that obtained from finite element analysis.

References:

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Memo

Memo:

Biography: Wang Fan(1971—), male, doctor, associate professor, wangfan@scut.edu.cn.
Foundation item: The Open Project of State Key Laboratory of Subtropical Building Science, South China University of Technology(No. 2014KB29, 2015ZB30).
Citation: Wang Fan, Lan Xiaoyi, Pan Xiaorong, et al. Strength calculation methodology for internally ring-stiffened DT-joints[J].Journal of Southeast University(English Edition), 2016, 32(1):67-72. DOI:10.3969/j.issn.1003-7985.2016.01.012.

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