Evaluation on Structural Performance of PC Composite Beam According to Types of Connection Plate

Recently, construction methods have been developed in the construction industry to solve problems such reducing construction period and cost. One of them is the precast concrete (PC) composite beam, which has advantages such as economic feasibility and quality assurance by utilizing the advantages of steel and reinforced concrete structures using Gerber beams. PC composite beams are made of PC beams in the form of embedded connection plates at the factory, and are connected together with slab concrete after pin connection using high-strength bolts at the site to form one body. As the PC composite beam uses the connection plate, it is possible to apply the Gerber beam, so it is possible to optimize the flexural moment distribution. However, the current structural design standard does not provide specific information on the height or embedded length of the connection plate, making it difficult to design. Therefore, the scope of the study was limited to PC composite beams, the form was divided into continuous and discontinuous, and the influence variables were set to plate height and embedded length to conduct finite element analysis. As a result of the analysis, the embedded length is the factor that has the greatest influence on the structural performance of PC composite beams. The composite beam with a height of 300 mm and a length of 1200 mm was found to be the most efficient with a flexural strength of 505 kN m and a deflection of 8.9 mm. The results of this study can be used as the basis for the details and structural design methods of PC composite beams.