Research On Simplified Vibration Model Of Three Kinds Of Commonly Used Structures

The vibration simplified model of structures can reflect the structures’ vibrationcharacteristics truly. This paper established three kinds of vibration simplified models——Multi-particle shear model, Shear-bending model and Remove bending deformation model.And compare the seismic response between simplified model and space component model,and discuss their accuracy, then putting forward the using conditions and range of eachvibration model, and analysis foundations for the three kinds of commonly used structuresincluding frame structure,shear wall structure and frame-shear wall structure. The mainwork and achievements of research are as follows:1. The shear deformation of structure and the bending deformation of structure are described.The shear deformation of structure contains components’ shear deformation andcomponents’ bending deformation. In order to facilitate research, it is necessary to discussseparately on the shear deformation of structure and the bending deformation of structureand their corresponding stiffness.2. Establishing6and12storey space reinforced concrete frame structure as example models.First, do the elastic-plastic time history analysis on their space component model by usingSNAP finite element software. Second, two example models can be converted toMulti-particle shear model, and do the elastic-plastic time history analysis by usingcomputer programs. Finally, it is proved that when multi-particle shear model comes tolow-rise structures, it is accurate, but when it comes to high-rise structures, it should becarefully chosen.3. Establishing “Shear-bending” model, discussing frame part and shear wall part of theframe-shear wall structure separately. According to relationship between storey and itslateral displacement of the frame-shear wall structure and its frame part and shear wall part,proving the classical theory that frame structure is given priority to shear deformation, shearwall structure is given priority to bending deformation, frame-shear wall structure presentsbending-shear deformation. Analysing and comparing the calculation results of “shear andbending” model in self-programming and space component model in Midas/Gen, provingthat the theoretical analysis method this paper adopt is reasonable, and the operation resultsof self-programming is correct.4. Establishing bending deformation removed model, putting forward a method of determining the practical value of nominal true shear elastic stiffness and related parametersof the restoring force model. Providing powerful means for high-rise frame structure seismicresponse of the elastic-plastic time history analysis. Comparing three kinds of similar12-storey structure’s bending deformation of the percentage of total deformation couldknow that the higher the structure, the more bending deformation the building has, framestructure has less bending deformation, shear wall structure has much bending deformation,and frame-shear wall structure’s bending deformation is in between. Seismic responses ofthree kinds of structure using bending deformation removed model, multi-particle shearmodel and space component model are different. But bending deformation removed modelcan accurately reflect the real shear displacement of each storey and the real shear stiffness,and it can be used all kinds of structures and regardless of the high or low structures.