Continuous Development Of Elastoplastic Dynamic Time History Analysis Program DUT2014 For Super High-rise Buildings

DUT2014 integrated platform is a computational program for elastic-plastic dynamic time-history analysis of super high-rise buildings developed by our team.Compared with other elastic-plastic dynamic time-history analysis software,this integrated platform adopts a new element transformation strategy(STP),which has the advantage of high computational efficiency.However,there are still many imperfections in the integrated platform,such as unstable eigenvalue calculation of modal solver,complex pre-processing modeling functions,imperfect fast section library and so on.In order to improve the pre-processing modeling function and computing analysis function of the integrated platform,this paper will continue to develop the integrated platform.Specifically,in order to meet the user's requirements for computing and analysis of the integrated platform,the following parts of work will be carried out in this paper:(1)Two typical modal calculation algorithms are integrated into DUT2014 integrated platform.On the basis of fully investigating and researching the theory of modal calculation,a programming algorithm is formed.And the code of modal solver is written by Microsoft Visual C++,and then integrated into DUT2014 integration platform.In this paper,two modal solvers will be integrated into DUT2014 integrated platform.One is subspace iteration method,another is implicitly restared Arnoldi method.After compiling the modal solver code through the integrated platform,the calculation accuracy of the modal solver is verified by a structural model with a certain number of degrees of freedom.At the same time,the computational efficiency and accuracy of subspace iteration method and implicitly restared Arnoldi method are also studied by numerical experiments.(2)Two kinds of pretreatment interface programs from SAP2000 and Midas to DUT2014 integrated platform are studied and developed.On the basis of fully studying the text files of structural model information exported by commercial software such as SAP2000 and Midas,the program is written with Microsoft Visual C++,so as to realize the transformation of structural model data file exported by commercial software into ep file required by DUT 2014 integration platform.In this paper,the program interface between SAP2000 and Midas model data files and ep files needed for DUT2014 integration platform is carried out,and the correctness of the model transformation is verified by comparing the natural vibration period,total mass,elastic time history response and elastic-plastic time history response of the structure before and after transformation with different scale structure models.(3)New complex sections suitable for structural modeling of super high-rise buildings are added to the fast section library of DUT2014 integrated platform.On the basis of fully studying the program architecture of DUT2014 integration platform,the section module of DUT2014 integration platform is found,so as to fully understand the definition method of the section module in the fast section library and the dependence relationship between the section module and other modules of DUT2014 integration platform.Aiming at the imperfection of the fast section library of DUT2014 integrated platform,this paper will expand new complex sections into the fast section library of DUT2014 integrated platform to realize the convenience of user's modeling,and verifies the correctness of the added sections through commercial software such as Midas.