Seismic Performance of Actual Members Retrofitted With Epoxy Resin Injection


Abstract eng:
Two beams and one column were taken from a primary school building that was constructed in 1961. Judging from the unit weight of the concrete it was estimated that the members were made of lightweight concrete. The obtained actual members were subjected to reversal loadings in order to investigate the effectiveness of the retrofitting method with epoxy resin. All test members were designed as the shear failure type based on the specifications of the Seismic Evaluation Standard of Japan. One of the beams was repaired with the epoxy resin injection method because honeycombs and cold joints in the concrete were observed. The column damaged by the first loading was also repaired using the same method as the beam. Shear and flexural cracks occurred during the early stage of loading and the strengths rapidly decreased at deflection angle R=1/100rad~1/200rad in all members. Although the crack patterns of the retrofitted members were similar to the members without epoxy resin injection, the maximum strength of the retrofitted members increased to 1.3~1.6 times that of the members without epoxy resin injection. The validity of the empirical equations for shear cracking and shear strength is discussed considering the light weight concrete, the low strength concrete, and the epoxy resin injection.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
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Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 1706.:
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