Title: Experimental evaluation of hollow-core wall orientation in steel moment frame
Date Published: May - June 2019
Volume: 64
Issue: 3
Page Numbers: 92 - 103
Authors: Mehdi Nazarpour, Parsa Monfaredi, and Abdoreza S. Moghadam
https://doi.org/10.15554/pcij64.3-02
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Abstract
Hollow-core precast concrete panels are widely used as
nonstructural wall units in steel structures. This experimental research evaluated the lateral seismic performance of hollow-core panels placed in a steel moment
frame. This paper discusses the effects of the orientation of the hollow-core panels that were reinforced
with two layers of high-strength, bonded pretensioning
strands for lateral resistance. A half-scale steel moment
frame with two hollow-core panels placed horizontally
was tested with cyclic lateral loading and a constant
axial load. An identical frame with two panels placed
vertically was tested in the same manner. The test
results indicated that vertical placement of hollow-core
wall units was more effective in resisting lateral loading and a higher load-bearing capacity was achieved,
as well as better flexibility and ductility compared with
panels placed horizontally. The damage sustained by
the system with the vertical panels was considered to
be nonstructural damage, which is more desirable than
structural steel frame damage. The vertical placement
of hollow-core wall units controlled nonstructural
damage, improved the seismic behavior of the steel
moment frame at high seismic forces and resisted
higher lateral loads. The movement of the hollow-core
panels in the steel moment frame was observed with
the vertical panels rocking within the frame and the
horizontal panels sliding against each other.