Experimental versus numerical response of RC walls subjected to earthquake loading

Scientific paper - Original scientific paper

• Author: Emir Hodžić
• Author: Senad Medić
• Author: Mustafa Hrasnica
• Author's institution: University of Zagreb; Faculty of Civil Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract (english)

Reinforced-concrete walls have been frequently used as a bearing system for seismic loads in the
last half of the century. They partially replaced the traditional European way of building with brick
walls, and they are most often used for the construction of residential and business buildings
of medium height. The aim of this study is to numerically examine the influence of different
reinforcement layouts on the load bearing capacity and ductility of slender shear walls. Three walls
experimentally tested at ETH-Zürich under in-plane static cyclic action were used for comparison
with finite element models. The walls were designed for different ductility classes according to
Eurocode 8. Two types of modelling techniques were made employing SAP2000nl. A frame model
with nonlinearity localized in a plastic hinge was made using Takeda and Pivot hysteretic rules. A
nonlinear layered shell model was applied using Mander’s definition of confined and unconfined
concrete while reinforcement was assumed as hardening plasticity. Advanced numerical analysis
on 2D models was performed using DIANAFEA software package assuming smeared cracking
approach. Behaviour of concrete was described with total strain rotating crack constitutive law
while von Mises yield criterion defines the stress-strain relationship of embedded reinforcement.
Plastic hinge models are simple, require short calculation time and predict load-bearing capacity
quite well. Shell layered model was mesh dependent and extremely time-consuming resulting
in premature failure or mismatch in energy dissipation with respect to experimental findings.
Refined numerical modelling using powerful solvers in DIANA proved to be the most successful
regarding computational time and feasible mesh densities. Good agreement of dissipated energy,
load bearing capacity and crack layout with test results was obtained.

• Keywords (english): reinforced-concrete wall, earthquake, capacity design method, nonlinear analysis
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Unknown
• Publication version: Published version
• Publication title: 1st Croatian Conference on Earthquake Engineering 1CroCEE
• Numbering: pp. 1015-1025
• p-ISSN: 3043-8071
• DOI: https://doi.org/10.5592/CO/1CroCEE.2021.106
• URN:NBN: urn:nbn:hr:237:398573
• Publication: 2021-03
• Conference: Title: st Croatian Conference on Earthquake Engineering; Location: Zagreb, Croatia; Start date: 2021-03-22; End date: 2021-03-24; Assembly type: Lecture
• Type of resource: Text
• Publisher: Sveučilište u Zagrebu Građevinski fakultet
• Access conditions: Open access
• Created on: 2024-09-02 08:53:53