NUMERICAL STUDY ON PERFORMANCE OF A SIX-STORY HYBRID STRUCTURE WITH STEEL MOMENT FRAME SYSTEM AND USING CLT AS SHEAR WALL AND FLOOR PANEL

Recently, researchers have introduced CLT (Cross Laminated Timber), a kind of engineered wood product that is one of the most suitable construction materials for green building development for the future cities. In the design steel-timber hybrid structure presented in this study, steel is used for the intermediate moment resisting frame of the building and CLT are used as floor panels and shear walls. Therefore, the lateral load-resisting system of the hybrid structure in this study is the dual system of steel intermediate moment resisting frame and CLT shear wall. In order to investigate the structural performance of the above-mentioned system, a sample 6 stories building are considered to be constructed using two types of structural systems were designed using ETABS software; 1- a steel intermediate moment resisting frame with composite concrete-steel floor, and, 2- dual steel intermediate moment resisting frame plus CLT shear walls with timber-steel floor using CLT horizontal panels. Then, FEM model of each of structural frame two types was analyzed using pushover method by ABAQUS software. The behavior of the two type 6-story frame systems were compared. By comparing the weight of Structure with the two types of lateral load-resisting system, it was concluded that the total weight of the building reduced by %22.01 in the structure with a dual system of steel intermediate moment resisting frame and CLT shear wall and composite timber-steel floors, compared to the structure with the steel intermediate moment resisting frame system and composite concrete-steel floors. Comparison of the results concludes that the application of possible substitution of CLT panels instead of steel and concrete common materials of structural members results in light weight structure with acceptable seismic behavior. Furthermore, development of hybrid timber-steel construction can provide buildings with less greenhouse, environmental, and noise pollution for producing materials and building structure, lower energy consumption, less weight, good seismic behavior, fast construction speed, and renewable resource capability.