THE THICKNESS EFFECT OF CONNECTION PLATE OF BEAM TO STEEL FILLED COLUMN WITH CONCRETE ON SEISMIC BEHAVIOR OF THE CONNECTION

In construction science, the combined use of diferent materials by considering their properties has a very long history. Such an approach has evolved with the changing needs and expectations of society worldwide. In recent century, the use of concrete and steel has emerged in building method. Steel frame construction brings many advantages including lower costs, lower weight, higher speed, and the ease of construction. High strength, high rigidity, durability, low maintenance, and re resistance are some benets of concrete frame construction. Compound structures provide a possibility to utilize the advantages of both steel and concrete materials eectively. The present research is an attempt to consider the behavior of beam to-column connections of 174 samples including 100 samples and 74 samples of steels lled with concrete beam-to-column connections of steel in the nite- element analysis software ABAQUS. The eect of plate thickness to the beam connection steel columns lled with concrete on the seismic behavior of connections is also discussed. The results clearly show that the elastic stiness of the specimens compared to the steel column with mid plate pass in the CFT connection, CFT connection with plate pass, steel column connection with top and bottom plates, CFT connection with top, bottom and mid pass plates, steel column connection with top, bottom, and mid plates, increase as 0.24, 0.28, 0.6, 0.09, 0.68, and 0.3, respectively. In addition to the mentioned results, the ratio of ductility of the specimens compared to the steel column with mid plate pass in the CFT connection, CFT connection with plate pass, steel column connection with top and bottom plates, CFT connection with top, bottom and mid pass plates, steel column connection with top, bottom and mid plates increase as 0.16, 0.2, 0.08, 0.02, 0.3, and 0.17, respectively.