Structural assessment of the coupled influence of corrosion damage and seismic force on the cyclic behaviour of RC columns

Abstract A set of benchmark, medium scale, shaking table tests on corroded reinforced concrete (RC) columns is conducted with the aim of investigating the effects of corrosion damage on the nonlinear dynamic behaviour of RC bridge piers. The experimental programme consists of an uncorroded control specimen and two corroded RC column specimens, with identical structural details. An accelerated corrosion procedure is used to corrode the RC columns. The uncorroded and corroded specimens are subjected to far-field long duration ground motion excitations. The two corroded columns had 51% and 65% average mass loss ratios. The testing sequence includes slight, extensive, and complete damage levels, followed by an aftershock to examine the cascade effect on the nonlinear dynamic response of the proposed RC columns. The experimental results show that corrosion changes the failure mode of the RC columns, and has a significant negative impact on the residual strength (about 50% mass loss results in about 80% strength reduction) and drift capacity of RC columns.

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Experimental evaluation of the corrosion influence on the cyclic behaviour of RC columns

Engineering Structures ◽

10.1016/j.engstruct.2014.06.043 ◽

2014 ◽

Vol 76 ◽

pp. 112-123 ◽

Cited By ~ 94

Author(s):

Alberto Meda ◽

Serena Mostosi ◽

Zila Rinaldi ◽

Paolo Riva

Keyword(s):

Experimental Evaluation ◽

Rc Columns ◽

Cyclic Behaviour

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Parametrical Investigations on Concrete-Jacketed RC Columns with Pre- and Post-Corrosion Damage

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1101.368 ◽

2015 ◽

Vol 1101 ◽

pp. 368-372

Author(s):

Sai Sai Wang

Keyword(s):

Reinforced Concrete ◽

Axial Compression ◽

Peak Load ◽

Axial Loading ◽

Corrosion Damage ◽

Rc Columns ◽

Distinct Effect ◽

Rc Column ◽

Parametric Studies ◽

Rebar Corrosion

The main objective of this study is to parametrically investigate the effect of pre-and post-corrosion and loading damage on concrete-jacketed reinforced concrete (RC) columns under uni-axial loading. A model capable of evaluating the squash load of un-jacketed or jacketed RC columns with and without corrosion damage was induced. The parametric studies based on this model are meant to investigate the effect of rebar corrosion on the axial compression capacity of jacketed RC column. It was concluded that the longitudinal rebar corrosion has more distinct effect on the peak load than that of web rebar. The jacketing rebar corrosion has more distinct effect on the peak load than that of substrate rebar.

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Seismic Performance Evaluation of Special RC Frames with Gravity Steel Columns under the Base Level

Shock and Vibration ◽

10.1155/2020/8825258 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11

Author(s):

Amin Zaherdannak ◽

Amirhosein Shabani ◽

Saeed Erfani

Keyword(s):

Seismic Performance ◽

Cross Sections ◽

Rc Columns ◽

Steel Columns ◽

Seismic Performance Evaluation ◽

Performance Factors ◽

Multistory Buildings ◽

Base Level ◽

Rc Frames ◽

Seismic Force

In many multistory buildings, basement levels are used as parking spaces. However, dimensions of reinforced concrete columns at these levels cause them to be unideal parking spaces. An alternative is to replace the RC columns in middle frames with steel columns that are not a part of seismic force resisting system and only support vertical loads, therefore have smaller sections. Using simply supported steel columns under the base level is beneficial not only because they have smaller cross-sections which lead to increasing the parking space but also these steel columns are easier to be replaced after any possible damages and can be considered as convenient alternatives compared to ordinary RC columns in construction. In this research, seismic performance of structures implementing the suggested alternative is evaluated using nonlinear static and dynamic analyses and compared to that of regular counterparts. Results show that these structures pass the acceptability tests proposed by FEMA P695 methodology. Moreover, seismic performance factors of these two structural systems have been calculated and proposed.

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