Steel Sheet Shear Walls with Burring Holes for Low- to Mid-Rise Housings

Abstract

<p>Steel sheet shear walls with cold formed edge stiffened burring holes are applied to low- to mid-rise housings in seismically active and typhoon- or hurricane-prone regions. A configuration with burrs on the inside and smooth on the outside enables the construction of omitting the machining of holes for equipments and thinner walls with simplified attachments of finishings. In-plane shear experiments and finite element analyses revealed that the walls allowed shear stress to concentrate in intervals between the burring holes. The walls maintained stable shear load and large deformation behavior, and the deformation areas were limited in the intervals and a large out-of-plane waveform in a sheet was effectively prevented owing to edge stiffened burring ribs. The design methods are developed for evaluating the shear load of the walls at story angle from zero to 1/100, using the idea of decreasing the band width of the inclined tension fields on the intervals with the effects of the thickness.</p>

Cold Formed Steel Panels for the Seismic Strenghtening of Existing Rc Buildings

“…For the sake of clarity, the trapezoidal sheet shear walls [16] and the steel sheet shear wall with burring holes [12], are called Panel 1 and Panel 2 in the following, respectively. The main geometries and layout are summarized in Figure 1; further details on the tested panels may be found in [16] and [12]. Both the panels were tested under cyclic loadings.…”

“…Two interesting applications of cold-formed steel panels were tested at the Nagoya Institute of Technology (Nagoya, Japan) ( [12], [13], [14], [15], [16]). Based on the results of the experimental campaigns on a) steel trapezoidal sheet shear walls [16], and b) steel sheet shear walls with burring holes [12], these systems are investigated herein with the purpose of evaluating their suitability as seismic retrofit systems for existing RC buildings. With this aim, first, the compatibility of this system with post-World War II RC buildings was assessed.…”