The Analysis On Mechanical Behavior Of The Cellular Beam Steel Frame Based On Stereo Garage

Stereo garage is a good solution to the problem of China’s urban traffic congestion and hard parking.and the vertical lifting mechanical parking is applied widely as a general form of stereo garage.The spacing of the column of the transverse frame in the vertical lifting mechanical parking is obviously larger than that of the longitudinal frame, resulting in relatively weak stiffness of the transverse frame and a larger lateral displacement under a lateral load. In order to increase the lateral stiffness of the transverse frame,while meeting the functional requirements of stereo garage, that is the kept traverse of the car and the car carrying board between the workshop and the hoisting shaft,the stereo garage is studied in this thesis using the cellular beam steel frame in the lateral direction.Most of stereo garages in China are located in the fortified zone against seismic activity,especially for the structure design of stereo garage in high earthquake intensity regions,the research on mechanical behavior under earthquake action is particularly important.How to choose reasonable parameter values of the stereo garage of the cellular beam steel frame and making it have good dissipation capacity and ductility is the important content of this thesis.Firstly, the finite element model of parking of cellular beam steel frame with fifteen elevators is established by the ANSYS software,and the calculation results of cellular beam steel frame and pure frame and concentrically braced frame under the same condition are comparative analysed,and the research results show that:the static behavior of the cellular beam steel frame is good.Taking it into account that the height of the cellular beam steel frame based on stereo garage is generally larger,and it should satisfy certain requirements in the lateral stiffness,the effect that have impact on the lateral stiffness is analyzed to providing the basis for reasonable parameter selection. Due to the impact of cellular beams, structural stress distribution becomes more complex, so the parameters of stress distribution are studied and reasonable parameters makes the structure has good static performance, thereby it can provide a reference for the wide application of this new frame structure.For the hysteretic behavior of the structure having an initial qualitative analysis, the bottom of two in the fifteen story are selected to perform hysteresis analysis. Through hysteretic performance comparison of the cellular beam steel frame with the pure frame and the concentrically braced frame,the dissipation capacity and ductility are good,and it indicates that the mechanical behavior of cellular beam steel frame has outstanding advantages. Finally.from the study of the hysteresis behavior of the cellular beam steel frame based on stereo garage,the hysteresis behavior of the structure is analyzed on the change of expansion ratio, opening diameter, opening amount and clear distance of beam-ends.At the same time,according to the result of structural analysis,the values of the relevant recommendations are given.The mechanical behavior of stereo garage of cellular beam steel frame under monotonic load and cyclic load is analyzed in this thesis, which has important reference value for writing the related code and guide of the practical engineering design.