Strengthening Technique of Reinforce Concrete Structure: Bangladesh Perspective

Abstract

Problem Statement: Strengthening of existing building is significant issue when need to carry additional load. Section Enlargement, RC jacketing and retrofitting by FRP are common strengthening methods used by practical engineers in Bangladesh to increase the load carrying capacity of an existing building. The aim of the study was to determine the most effective and economical strengthening methods among the mentioned methods in perspective of Bangladesh for one storey vertical extension. Approach: Methodology of the study included, making plan and beam-column layout, capacity assessment, determination of allowable bearing capacity of soil, structural analysis and cost analysis. The actual compressive strength of concrete was determined by core test. Results: After the analyses, results show that the column and foundation merely carry the load from super structure. But, the column and foundation is not capable of carrying extra load from additional storey as the design vertical load for four storeys will exceeds the load carrying capacity of the element and hence, strengthening is required for column and foundation which will prone to damage after vertical extension. Conclusions: Finally, strengthening of column by RCC jacketing and strengthening of foundation by foundation enlargement were selected by cost analysis and engineering point of view.