Study on geometric optimization for new type of steel mortise and tenon joint based on performance

Abstract Mortise and tenon joint is a common connection way of ancient Chinese timber structure. On this basis, in order to explore for a new type of mortise and tenon joint suitable for steel structure, the finite element model of a new type of steel mortise and tenon joint was established to simulate the whole behavior of it under tensile force and bending moment by using ABAQUS software. In this way, the effects of tenon number, tenon height and tenon width on the maximum local Mises stress, area of plastic stress region, tensile and flexural properties were discussed. The results show that the maximum local Mises stress, area of plastic stress region, tensile and flexural properties of the new steel mortise and tenon joint are significantly affected by the tenon number and height, while the tenon width has little effect on these properties. When the tenon number is 4, the tenon height is 15mm, and the tenon width is 5mm, the new steel mortise and tenon joint has the best mechanical performance, and the steel consumption is relatively lower.