Teaching and Research Group:College of Civil Engineering, Huaqiao University
Journal:Journal of Structural Engineering, ASCE
Place of Publication:United States of America
Key Words:Masonry Infilled RC Frames, Central Window Openings, Strength and Stiffness Empirical Model
Abstract:Lateral load behavior of reinforced concrete frames infilled with fly ash brick masonry having various sizes of central openings was investigated experimentally. Results showed that the infilled frames with openings exhibited significantly different lateral load behavior than the corresponding infilled frames without openings. The drift limit states corresponding to commencement of major events during the lateral loading (initiation of major cracks in frame members, peak load, and 80% of post-peak load) were found to improve significantly due to presence of openings when designed in accordance with current earthquake standards. Presence of openings in masonry infills modifies two of the most important design parameters - lateral stiffness and strength, for which nonlinear prediction models were developed by carrying out statistical analyses of the experimental results. The empirical models were used to estimate the stiffness and strength of frames tested in the past studies, and were found to be more accurate and consistent compared to several existing predictive relations. A normalized lateral load-drift relationship for different performance levels of such frames was also propounded based on the observed damage events. The empirical equations can be utilized very conveniently to simulate the variation of stiffness and strength (global response) of the infilled frames with openings under lateral loads.
Indexed by:Journal paper
Discipline:Engineering
First-Level Discipline:Civil Engineering
Document Type:J
Volume:146
Issue:4
Page Number:04020021
ISSN No.:0733-9445
Translation or Not:yes
Date of Publication:2020-01-22
Included Journals:SCI
DOI number:10.1061/(ASCE)ST.1943-541X.0002562
Links to published journals:https://ascelibrary.org/toc/jsendh/146/4