Seismic retrofitting of low-rise masonry and concrete walls using steel strips

Citation
M. Taghdi et al., Seismic retrofitting of low-rise masonry and concrete walls using steel strips, J STRUC ENG, 126(9), 2000, pp. 1017-1025
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Civil Engineering
Journal title
JOURNAL OF STRUCTURAL ENGINEERING-ASCE
ISSN journal
0733-9445 → ACNP
Volume
126
Issue
9
Year of publication
2000
Pages
1017 - 1025
Database
ISI
SICI code
0733-9445(200009)126:9<1017:SROLMA>2.0.ZU;2-A
Abstract
Four concrete block masonry and two reinforced concrete walls were designed to simulate low-rise nonductile walls built decades ago, before the enactm ent of earthquake-resistant design provisions. Two masonry walls were unrei nforced and two were partially reinforced. The concrete walls had minimum r einforcement. One wall from each pair was retrofitted using a steel strip s ystem consisting of diagonal and vertical strips that were attached using t hrough-thickness bolts. Stiff steel angles and anchor bolts were used to co nnect the steel strips to the foundation and the top loading beam. All wall s were tested under combined constant gravity load and incrementally increa sing in-plane lateral deformation reversals. The lightly reinforced concret e walls were also repaired using only vertical strips and retested. These t ests showed that the complete steel-strip system was effective in significa ntly increasing the in-plane strength and ductility of low-rise unreinforce d and partially reinforced masonry walls, and lightly reinforced concrete w alls.