线性结构多尺度模拟界面连接方法研究.pdfVIP

The 12th International Symposium on Structural Engineering INTERFACE CONNECTION METHOD FOR MULTI-SCALE SIMULATION OF LINEAR STRUCTURES 1 2 F.Y. Wang , Y.L. Xu ¹Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, P.R. China ²Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P.R. China Abstract: Multi-scale simulation has recently attracted increasing attention in structural engineering for numerical simulation of a large engineering structure at both macro- and micro-scales so that not only global structural performance but also local phenomena such as stress concentration can be evaluated at the same time. Nevertheless, the multi-scale simulation needs numerical methods for coupling the interfaces between different types of elements, such as connections of beam-to-shell and beam-to-solid. This paper presents an accurate and efficient method in terms of constraint equations for handling interfaces between different types of elements. The relationship between the coefficientmatrix of the constraint equation and the nodal force vectorisfirst derived. The numerical method for generating the coefficient matrix of the constraint equation is given based on the stiffness matrix at the interface. The method can be used for interface connection of beam-to-shell or beam-to-solid ofmembers with arbitrary cross-section. The method is finally applied to acantilever witha box cross-section and the numerical results demonstrate that the method is accurate and easy to be implemented. Keywords: Multi-scale simulation, interface connection, constraint equation, linear structure 1 INTRODUCTIO