Seismic assessment of existing RC shear walls non-compliant with current code provisions

Abstract

This work forms part of a research programme to assess and strengthen existing reinforced concrete (RC) walls that were designed using older seismic codes. The main object of the present paper is to examine the behaviour of concrete shear walls that do not comply with modern seismic codes (Eurocode 2 (EC2) and Eurocode 8 (EC8)) andcompare their experimental performance with the provisions for assessment of RC members included in EC8 Part 3. For this purpose, a series of six shear walls (height h 1 . 40 m, length l 0 . 74 m, thickness b 0 . 10 m) was designed and tested under static cyclic loading. The wall specimens were characterised by various types of reinforcement arrangement, focusing on different amounts of shear reinforcement. The issues investigated are the failure modes, ductility level, the absence of confined boundary elements, the low amount of shear reinforcement, the influence of diagonal reinforcement and the influence of axial load. The experimental results are compared with the provisions included in EC8 Part 3, which predict the shear strength, the chord rotation ductility and the effective stiffness of RC shear walls.

Parameter optimization for pivot hysteresis model for reinforced concrete walls with different failure modes

“…Hysteretic test results by various researchers 33–65 on a total of 108 single‐story, one‐bay reinforced concrete wall specimens under cyclic loading were collected by the authors to calibrate the parameters for the current study. The majority of the specimens collected by the authors were extracted from the SERIES Database 3 and the rest of the test data was collected independently by the authors.…”

Seismic evaluation of flexure–shear dominated RC walls in moderate seismic regions

“…Although significant research has been conducted regarding seismic performance of RC shear walls (Beyer et al, 2011;Christidis et al, 2013; …”