단부 파쇄형 휨 보강에 따른 철근콘크리트 전단벽 휨 성능 평가

초록

The purpose of this study is to analyze the method of retrofitting flexural strength and the flexural performance of retrofitted shear walls. There are various ways to reinforce the flexural strength of reinforced concrete shear wall structural systems that have already been built, inthe case of that, the external force is increased, and the internal force is insufficient. However, there are various problems, such as excessiveflexural stiffness after reinforcement and increasing the thickness and length of the wall. We have developed a retrofit method to solve theseproblems. The wall end is excavated to place the required vertical rebars, and concrete is poured after placing rebars. This is the sameconcept as creating wall end boundary elements later on. We also studied the anchorage method of reinforcement and the interaction methodbetween the retrofitting end and the existing wall. The flexural test results for the reinforced concrete shear wall using the studied retrofitmethod can be predicted according to the sectional analysis and FEM analysis, and there are differences in the plastic hinge length, crackpropagation, stiffness degradation and energy dissipation due to the bending depending on the vertical rebar ratio of wall end.

키워드