Multi-level nonlinear modeling verification scheme of RC high-rise wall buildings


Earthquake-resistant reinforced concrete (RC) high-rise wall buildings are
designed and detailed to respond well beyond the elastic range under the expected
earthquake ground motions. However, despite their considerable section depth, in terms of
analysis, RC walls are still often treated as linear elements, ignoring the effect of deformation
compatibility. Due to the limited number of available comprehensive experimental
studies on RC structural wall systems subjected to cycling loading, few in-depth analytical
verification studies have been conducted. Motivated by the increasing need for more
accurate seismic risk assessment of high-rise buildings in multi-scenario seismic regions, a
multi-level nonlinear modeling verification scheme is presented in this paper to investigate
two different nonlinear modeling techniques for shear walls (2- and 4-noded fiber-based
elements). The investigated modeling approaches and their key parameters are verified
against the results of Phase I of uniaxial shaking table specimen tests (performed at the
University of California, San Diego) on a seven-story full-scale RC shear wall structure
under base excitations representing four earthquake records of increasing intensities. Three
numerical models are created using two different tools (ZEUS-NL and PERFORM-3D).
The results obtained from the numerical models are compared with the experimental
results both on global and local response levels (top displacement, interstory drift, story
shear force, story bending moment, period elongation and rebar tensile strain). The study
reveals the superior performance of 4-noded fiber-based wall/shell element modeling
approach in accounting for the 3D effects of deformation compatibility between lateral and
gravity-force-resisting systems. The study also highlights the sensitivity of attained results
to the stiffnesses assigned to the rigid links and 3D joints required to connect the shear
walls to neighboring elements when a 2-noded element is used.

Multi-Level Nonlinear Modeling Verification Scheme of RC High-rise Wall Buildings
Wael AlwaeliMulti-level nonlinear modeling verification scheme of RC high-rise wall buildings


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