NIST Research Program on the Seismic Resistance of Partially-Grouted Masonry Shear Walls.
NIST Research Program on the Seismic Resistance of
Partially-Grouted Masonry Shear Walls.
Schultz, A. E.
NISTIR 5481; 110 p. June 1994.
Available from: National Technical Information Service
Order number: PB94-219052
masonry; shear walls; bond beam; building technology;
cyclic load tests; finite elements; horizontal
reinforcement; partial grouting; seismic loading; shear
A review of the current status of research on masonry
structures at the Building and Fire Research Laboratory
of the National Institute of Standards and Technology
(NIST) is presented, and an ongoing project on
partially-grouted masonry shear walls is summarized.
This report draws from previous work conducted at NIST,
including a comprehensive literature review (Yancey et
al., 1991), simulated seismic load tests of unreinforced
masonry walls (Woodward and Rankin, 1983; 1984a; 1984b;
1985a; 1985b) and reinforced masonry walls (Yancey and
Scribner, 1989), and numerical analyses employing
empirical formulations (Fattal and Todd, 1991; Fattal,
1993a, Fattal, 1993c) and finite element models
(Yancey). The previous NIST research culminates with a
preliminary draft outlining a research program on
partially-grouted masonry shear walls (Fattal, 1993b).
This program calls for simulated seismic load
experiments of partially-grouted masonry walls, and
numerical analyses, both empirical and finite element
modeling of shear wall behavior. The existing
preliminary draft of the research plan on
partially-grouted masonry shear walls is revised in
response to recent findings on the cyclic load response
of masonry shear walls and to better reflect laboratory
requirements for simulated seismic load tests at the
NIST tri-directional testing facility (TTF). Specimen
configuration, test setup, instrumentation, testing
procedure, and numerical modeling are presented, along
with a discussion of the shear strength of the specimens
calculated using expressions available in the technical
literature. The issue of minimum horizontal
reinforcement in masonry shear walls is addressed in an
appendix, and expressions are derived to serve as a
guideline for the experimental program. Potential
directions for future research are discussed in a second