| The Composite Steel Plate and Concrete Shear Wall,a.k.a CSPCSW,holds great advantages such as high load bearing capacity,good performance s on ductility while remaining a small crossection,compared with traditional ones.Among the other kinds of concrete-steel composite shear walls,it excels at avoiding the appearance of cracks and performing both as load bearing elements and templates,etc,which makes it play an increasingly imporatant role as buildings become higher and more complicated these days.Current calculating formulas of CSPCSW in China are simply conducted based on the correspondant regulations from foreign codes,failing to show the distinctive mechanical characteristics of CSPCSW.Also the whole study of conducting a numerical simulation which coordinates with the experienment in the past was based on micro modeling basically.Micro modeling analysis can be very precise and time comsuming at the same time,failing to be assistive to structure designing.Therefore a typical study of theoretical performance towards to the CSPCSW and a numerical simulation based on marco modeling is of necessity.In this dissertation,a group of standard type of CSPCSW is chosen as benchmark experimental group.Formulas of CSPCSW are conducted based on the unified theory of specified concrete filled steel tubular members a.k.a CFST,and following comparisons with values from foreign codes and benchmark experienment are made.Combined with the experienment p henomena,designing parameters and their impacts on the performance of CSPCSW are summarized.Catering to the mechanical charcteristics of CSPCSW,a set of new theoretical formulas for CSPCSW with steel tubes and H steels in its boundary restraint elements would be conducted,burying foundations for further analysis.OPENSEES,as the typical representative of finite element analysis software based on marco elements(the theory of fiber modeling),are used to conduct several numerical simulations,which turns out to be quite close to the ones in benchmark experiements and formula calculations.After analyzing the reason behind the error between simulations,formulas and experiements,two softwares(ABAQUS vs OPENSEES)are placed in comparison,aiming at their advantages and disadvantages,verifying the feasibility of using OPENSEES to conduct sturcture analysis while summerizing the parameters and methods of getting such a satisfying result,providing modelling information for the following analysis.Another set of simulations are conducted by using the methods above,mainly focusing on how embedded steel tubes and H steels of boundary restraint elements are going to affect the performance of CSPCSW.After being compared with the experiemental data,the correctness of this set of formulas is proved,making a further progress on the design and performance study on CSPCSW. |
