TY - EJOU AU - Lu, Xinzheng AU - Tian, Yuan AU - Sun, Chujin AU - Zhang, Shuhao TI - Development and Application of a High-Performance Triangular Shell Element and an Explicit Algorithm in OpenSees for Strongly Nonlinear Analysis T2 - Computer Modeling in Engineering \& Sciences PY - 2019 VL - 120 IS - 3 SN - 1526-1506 AB - The open-source finite element software, OpenSees, is widely used in the earthquake engineering community. However, the shell elements and explicit algorithm in OpenSees still require further improvements. Therefore, in this work, a triangular shell element, NLDKGT, and an explicit algorithm are proposed and implemented in OpenSees. Specifically, based on the generalized conforming theory and the updated Lagrangian formulation, the proposed NLDKGT element is suitable for problems with complicated boundary conditions and strong nonlinearity. The accuracy and reliability of the NLDKGT element are validated through typical cases. Furthermore, by adopting the leapfrog integration method, an explicit algorithm in OpenSees and a modal damping model are developed. Finally, the stability and efficiency of the proposed shell element and explicit algorithm are validated through the nonlinear time-history analysis of a high-rise building. KW - Triangular shell element KW - explicit algorithm KW - OpenSees KW - strong nonlinearity DO - 10.32604/cmes.2019.04770