NEHRP Clearinghouse

Title
Studies on Effects of Infills in Seismic Resistant R/C Construction.
File
PB82166190.pdf
Author(s)
Brokken, S. T.; Bertero, V. V.
Source
National Science Foundation, Washington, DC., October 1981, 191 p.
Identifying Number(s)
UCB/EERC-81/12
Abstract
This report summarizes experimental and analytical studies of the quantitative effects of infills in the seismic performance of buildings (particularly in buildings whose structural systems are based on the use of moment resisting frames alone); and the implications of these effects regarding the design of new buildings and retrofitting of existing R/C frame structures have been evaluated. The first part is concerned with the infill problem and the experimental investigation conducted to study the effects of infill panels on seismic response of reinforced concrete frames. This investigation consisted of a series of quasi-static cyclic and monotonic load tests on 1/3-scale models of the lower 3-1/2 stories of an 11 story-three bay reinforced concrete frame infilled in the outer two bays. The reinforced concrete moment frame was designed for high rotational ductility and resistance to degradation under reversed cyclic shear loads. A number of different panel material and reinforcement combinations were tested. The analytical studies are described in the second portion of this report. Implications of the experimental results are considered as to how the investigated infills affect the dynamic response of R/C moment resisting frame buildings, as well as considering the effect of these implications on the seismic resistant design and retrofitting of buildings.
Keywords
Masonry; Earthquake resistant structures; Reinforced concrete; Structural design; Dynamic response; Buildings; Earthquake engineering; Building retrofit; Cyclic loads; Earthquakes; Dynamic structural analysis