Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/75149
Title: Nonlinear formulation for tubular X-joints in frame analysis
Authors: Qian, X. 
Zhang, Y.
Choo, Y.S. 
Issue Date: 2012
Source: Qian, X.,Zhang, Y.,Choo, Y.S. (2012). Nonlinear formulation for tubular X-joints in frame analysis. Tubular Structures XIV - Proceedings of the 14th International Symposium on Tubular Structures, ISTS 2012 : 241-248. ScholarBank@NUS Repository.
Abstract: This paper presents a set of new joint formulations to describe the load-deformation characteristics for Circular Hollow Section (CHS) X-joints under monotonic brace axial compression. The proposed formulation couples the ultimate joint strength with the nonlinear deformation to determine the resistance of the joint at varying levels of the applied displacement. The ultimate joint capacity used in the current formulation follows the mean strength equations in the latest IIW recommendations, while the geometric-dependent parameters derive from regression analyses of a calibrated finite element investigation covering a practical range of joint parameters. This proposed formulation for CHS X-joints also includes the redevelopment of the joint strength at the contact of two opposing brace members under compression. The experimental results from the large-scale 2-D and 3-D frame tests validate the accuracy of the proposed formulation, which is implemented in a nonlinear pushover analysis as user-defined joint-spring elements. © 2012 Taylor & Francis Group, London.
Source Title: Tubular Structures XIV - Proceedings of the 14th International Symposium on Tubular Structures, ISTS 2012
URI: http://scholarbank.nus.edu.sg/handle/10635/75149
ISBN: 9780415621373
Appears in Collections:Staff Publications

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