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Experimental evaluation of seismic performance of low‐shear strength masonry infills with openings in reinforced concrete frames with deficient seismic details
Author(s) -
Mansouri Ali,
Marefat Mohammad S.,
Khanmohammadi Mohammad
Publication year - 2013
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.1115
Subject(s) - structural engineering , masonry , stiffness , dissipation , ductility (earth science) , geotechnical engineering , shear (geology) , beam (structure) , reinforced concrete , materials science , geology , engineering , composite material , creep , physics , thermodynamics
SUMMARY The influence of openings on lateral behaviour of low‐shear strength masonry infilled reinforced concrete frames is investigated. The design of the reinforced concrete frames in this study are aimed to reflect common seismic design deficiencies, such as location of lap splices at bottom of columns, insufficient transverse reinforcements at column and beam ends and lack of stirrups at beam‐column joints. Six half‐scale single‐storey, single‐bay frame specimens were tested under in‐plane lateral loading. The investigated parameters include shape (window and door), size (regular and large windows) and location of the openings (eccentric and central). The results indicate that presence of openings alters the failure mode, increases the damage level and reduces ductility, strength and stiffness of the infilled frame. The door opening led to reductions of 29% in strength, 34% in the effective stiffness and 23% in the energy dissipation capacity. The window openings led to average reductions of 23% in strength, 8% in effective stiffness and 11% in the energy dissipation capacity. Empirical equations are proposed for estimating overall reductions in stiffness and strength of infilled frames because of the presence of openings, which take into account the effects of size, shape and location of openings. Copyright © 2013 John Wiley & Sons, Ltd.