Experimental Study on The Seismic Behaviorof Rc Round Columns Strengthened by High Performance Ferrocement Laminates

DOI

10.2991/icmea-17.2018.56How to use a DOI?

Keywords

high performance ferrocement laminates (HPFL); seismic strengthening; twice-loading strengthening; load-bearing capacity; ductility

Abstract

Based on the experimental study of four RC full-size round columns under constant axial loading and lateral cyclic loading, the effectiveness of strengthening the RC round columns using the high performance ferrocement laminates (HPFL) for improving their seismic behavior has been examined. And with the powerful constraint function to the concrete and anchoring effect to longitudinal steel bar of mesh established in the way of dense transverse steel bar of mesh in the dangerous range of concrete, not only the seismic load-bearing capacity of the strengthened columns increases to varying levels, but also the seismic ductility improves to a greater degree and the total energy dissipation ability improves to a higher extent. In detail,with once-loading strengthening column, the seismic load-bearing capacity increased obviously due to the unobvious phenomenon of strain lag of HPFL to primary column concrete; for the twice-loading strengthening column as well as twice-loading strengthening column with seismic damage, although the problem of strain lag of HPFLs to primary columns concrete is more prominent one by one , their seismic ductility has been improved increasingly in turn, and the latter's P- envelopes curve with the downside rebounded, as a result of HPFLs' delayed acting and the increased capability of turning around of plastic hinges caused by the HPFLs' strong restriction mechanism working gradually. The HPFL can obviously improve the mode of longitudinal and transverse cracks for the strengthening round columns. Through the analysis of strain hysteresis performance of the columns' key points, the improvement reasons of seismic performance of the strengthened columns under different condition of strengthening and the degree of participating action in each loading stages of the HPFLs' both-way steel bar has been furtherly explored.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Longmin Jiang
AU  - Wenjing Liu
AU  - Xiang Yi
PY  - 2018/02
DA  - 2018/02
TI  - Experimental Study on The Seismic Behaviorof Rc Round Columns Strengthened by High Performance Ferrocement Laminates
BT  - Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)
PB  - Atlantis Press
SP  - 243
EP  - 251
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-17.2018.56
DO  - 10.2991/icmea-17.2018.56
ID  - Jiang2018/02
ER  -