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Design Recommendations for HSS-to-WTEE Connections in Long-Span Tri-Chord Structures

Li, Ying (2003) Design Recommendations for HSS-to-WTEE Connections in Long-Span Tri-Chord Structures. Master's Thesis, University of Pittsburgh. (Unpublished)

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Tri-chord sign structures are a frequently used sign type within the Commonwealth of Pennsylvania. However, due to the recent failure of this sign type during erection in PENNDOT district 6, the HSS-to-TEE connection response near the tri-chord structure tower has become a focus of concern. The present research first surveys existing literature related to the types of failure modes that govern in the connection regions of hollow circular Hollow Structural Sections (HSS). Then finite element modeling strategies are identified and subsequently verified using the experimental testing report of Thomas J. Boone et al. (1982). These validated modeling techniques are then employed to simulate the response of the considered HSS-to-WTEE connection region. Bearing capacities and failure modes are obtained for representative design cases commonly used in the Commonwealth. Based on the simulation results, a simplified, design office-type equation for predicting the WTEE bearing capacity of circular HSS members is formulated utilizing several approximations in conjunction with the yield-line theory. In addition, the nominal HSS-to-TEE connection capacities from the AISC Manual of Steel Construction (Third Edition) and AISC Hollow Structural Sections Connection Manual (AISC 1997) are evaluated for accuracy. It is found that nominal capacity in a circular HSS members loaded by a uniformly distributed line loading of finite length may successfully be applied for the prediction of connection capacity in HSS-WTEE joints that are consistent with those scenarios considered in current research.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Li, Yingyil21@pitt.eduYIL21
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairEarls, Christopher
Committee MemberLin,
Committee MemberOlyer, John Foyler@engr.pitt.eduOYLER1
Date: 8 May 2003
Date Type: Completion
Defense Date: 14 March 2003
Approval Date: 8 May 2003
Submission Date: 14 April 2003
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Civil and Environmental Engineering
Degree: MSCE - Master of Science in Civil Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: ABAQUS; Finite Element Modeling; Hollow Structural Sections; Yield-line Theory
Other ID:, etd-04142003-162505
Date Deposited: 10 Nov 2011 19:37
Last Modified: 15 Nov 2016 13:40


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