Study on Analytical Method of Aseismic Performance of Light Steel Frame Structure
|School||Nanjing University of Technology|
|Keywords||Light steel frame structure Seismic capacity Dynamic elastoplastic analysis Static Analysis Lateral load distribution Plastic hinge|
Light steel frame structure because it has a good structural performance, light weight and other characteristics, becoming the majority of designers respected, certainly because of the advantages of energy-saving, environmental protection and other government departments. Because of the many advantages of light steel frame structure, has been in a foreign country, the country is actively promoting the use of. For light steel frame structure seismic performance analysis method on the basis of the related theories and methods of inheritance and development at home and abroad, the time history analysis method, and overthrew the method of analysis, capacity spectrum method, the deformation of light steel frame node domain structure of the overall performance of the , Lateral Load Push-over analysis the five conducted research work. The focus is to study the seismic evaluation method for light steel frame structure. In this regard, using SAP2000 finite element calculation software and DRAIN-2DX finite element program for light steel frame structure of nonlinear dynamic time history analysis and Pushover Push-over analysis. Application DRAIN-2DX finite element program consider Shear Deformation light steel frame structure dynamic elastoplastic analysis, comparing the response of the structure under different seismic waves, and Shear Deformation seismic responses of structures . Show that when the node field of light steel frame structure seismic design requirements are met, you can use the ignore Shear Deformation model for power analysis. Foreign tear down the application and development of the analytical methods are briefly reviewed and summed up the tear down analysis of seismic performance evaluation and design using some method. Review the capacity spectrum method and the improved capacity spectrum method and its problems. 6 and 9th floors of light steel frame structure static analysis, the ability of the thickness of the structure of the different node domain spectral distribution of plastic hinge, the hinge sequence of seismic performance. Indicating that enhanced node domain to improve the lateral stiffness of the structure, reasonable node domain stiffness structure to ensure good seismic capacity. Different lateral load distribution on the results of the pushover Push-over analysis method, recommended for light steel frame structure lateral load distribution form. Push-over analysis method avoids the tedious elastic-plastic time history analysis is a relatively simple, has a certain accuracy of the simplified method. Structure based on the reaction to the first mode, the capacity spectrum method, improved capacity spectrum method of calculation results with good accuracy. However, these methods need to be separated from the capacity curve and seismic demand curve and then calculate the iterative calculation to structure equivalent linear single-degree-of-freedom system, the calculation is still relatively complex. In this paper, based on the N2 method based on simplified capacity spectrum method. Through numerical examples that prove the reliability of the method, and the calculation is simple.