Experimental Modelling and Analysis of Three One-Tenth-Scale Reinforced Concrete Frame-Wall Structures
Wolfgram, Catherine Ellen
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https://hdl.handle.net/2142/69936
Description
Title
Experimental Modelling and Analysis of Three One-Tenth-Scale Reinforced Concrete Frame-Wall Structures
Author(s)
Wolfgram, Catherine Ellen
Issue Date
1984
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Abstract
Three one-tenth-scale frame-wall models were tested on the earthquake simulator at the University of Illinois. The prototype was a full-scale structure tested at the Building Research Institute (BRI) in Tsukuba, Japan.
The models, designated NS1, NS2, and NS3, were composed of individual planar systems representing the primary lateral load resisting elements of the BRI structure. There were no floor slabs in the models. The first model, NS1, contained beam, column, and wall reinforcement equivalent to that of the comparable elements in the full-scale structure. Structures NS2 and NS3 had additional beam steel to account for the contribution of the slab steel in the full-scale structure.
Base motions for the small-scale structures were in one horizontal direction only. This was also the case for the load configuration applied to the full-scale structure. The Miyagi Ken-Oki 1978 (N-S) record was chosen as the primary earthquake since it was to be used by the University of California (Berkeley) for their one-fifth-scale tests.
A comparison of the response histories of the three one-tenth-scale structures indicated good correspondence when the structures were subjected to similar base motions. The response of the structures was dominated by the first mode.
Limit analysis was used to calculate the maximum base shear capacity of the structures. The measured shear and moment capacities of the structures were nearly twice those calculated from a planar analysis. This increase in capacity was due to three-dimensional interaction. The harness, used to attach additional story masses to the structures, acted as a stiff floor system. Vertical displacements due to rocking of the wall were transmitted to the exterior frames by the harness. The uplift created a tension in the exterior frame columns adjacent to the wall which increased the capacity of the structures. This is similar to the effect of the floor system observed in the full-scale structure.
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