Database analysis of diagonally- reinforced coupling beams and development of new connection detailing for steel and composite coupling beams
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Amiri Gheshlaghi, Amirhossein
issued: 2024-04-30T02:26:54Z
issued: 2024
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Reinforced concrete core wall buildings are the prevalent construction method for high-rise buildings in North America. The seismic performance of these buildings largely depends on the hysteretic response of coupling beams. This thesis studies the impact of design details on the hysteretic response of coupling beams in two phases. Phase one focuses on the diagonally-reinforced coupling beams, while phase two investigates the steel and composite coupling beams. A new database, including 51 tested diagonally-reinforced coupling beams, was developed in phase one. This database investigated the effect of design considerations, such as aspect ratio, beam and diagonal ties, axial restraint, and embedded longitudinal reinforcing, on the structural performance parameters, such as maximum shear capacity, initial stiffness, and rotational capacity of the diagonally-reinforced coupling beams. The analysis of this database led to new insights into the performance of diagonally-reinforced coupling beams. One key finding shows that the rotational capacity of low aspect ratio beams depends on the diagonal reinforcing ratio. Consequently, new design recommendations have been developed. The second phase focused on developing improved wall-to-beam connection detailing for steel and composite coupling beams. The current method, requiring the steel beam to be embedded into the wall with a long embedment length, is challenging to construct. Alternatively, welded bars called auxiliary transfer bars could be utilized to reduce embedment length, which is also challenging to construct. This thesis proposes a new connection method that utilizes compression steel bars, supporting the embedded beam in the bearing and making it easier to construct. The mechanics of the innovative detailing have been explained, and design plots have been provided. To investigate the seismic performance of this new detailing, a finite element model was developed using DIANA FEA 10.6 and verified through experime…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/88106
note: DATABASE ANALYSIS OF DIAGONALLY- REINFORCED COUPLING BEAMS AND DEVELOPMENT OF NEW CONNECTION DETAILING FOR STEEL AND COMPOSITE COUPLING BEAMS by Amirhossein Amiri Gheshlaghi A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) April 2024 © Amirhossein Amiri Gheshlaghi, 2024 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis entitled: DATABASE ANALYSIS OF DIAGONALLY- REINFORCED COUPLING BEAMS AND DEVELOPMENT OF NEW CONNECTION DETAILING FOR STEEL AND COMPOSITE COUPLING BEAMS submitted by Amirhossein Amiri Gheshlaghi in partial fulfillment of the requirements of the degree of Master of Applied Science. Dr. Lisa Tobber, School of Engineering Supervisor Dr. Perry Adebar, University of British Columbia – Vancouver Supervisory Committee Member Dr. Mohammad Tiznobaik, School of Engineering Supervisory Committee Member Dr. Mohammad Zarifi, School of Engineering University Examiner iii Abstract Reinforced concrete core wall buildings are the prevalent construction method for high-rise buildings in North America. The seismic performance of these buildings largely depends on the hysteretic response of coupling beams. This thesis studies the impact of design details on the hysteretic response of coupling beams in two phases. Phase one focuses on the diagonally-reinforced coupling beams, while phase two investigates the steel and composite coupling beams. A new database, including 51 tested diagonally-reinforced coupling beams, was developed in phase one. This database investigated the effect of design considerations, such as aspect ratio, beam and diagonal ties, axial restraint, and embedded longitudinal reinforcing, on the structural performance parameters, such as maximum shear capacity, initial stiffness, and rotational capacity of the diagonall…
has type: Thesis/Dissertation
date issued: 2024-05
is shown at: 10.14288/1.0442053
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nd/4.0/
scholar level: Graduate
contributor: Tobber, Lisa
type: Text
identifier URI: http://hdl.handle.net/2429/88106