The Influence Of Underpinning System And The Superstructure Subjected To Way Of Imposing Horizontal Force In The Process Of Building Moving

Structural underpinning is one of the key links of building integrally shift technology. Whether the underpinning of building is reasonable or not directly affects the reliability and security of the building moving,and it is a key technology determing the success of translation. During the process of structure moving experiment, walking beam has certain axial deformation. The layout of the point of force application in translation structure directly affects axial deformation of walking beam. so far, the influence that deformation of walking beam have on the superstructure has not been systemically studyed. It is essential to take a study of it.This paper takes account of various factors, a 1:3 scale model six-story frame structure (underpinning system and the upper structure) is designed, and a horizontal moving test is done. This paper studys and analyses deformation and internal force of different specimens (include walking beam connecting beam and bracing) and joint(underpinning joints and joint of beam and column in the upper structure), on condition that rollers are laid under upper track beams and different layouts of the point of force application (consist of axis one point tensioned and two point tensioned). Through the contrast and analysis of changes of joints'deformation and internal force under different layouts of the point of force application and before or after the horizontal impetus force was applied, the influence that deformation of walking beam have on the superstructure and underpining structure was got. A result was got that the additional internal force of the back of building in underpining system and superstructure arrive maximum value, and that axis deformation of underpining structure (walking beam) toward direction of moving and the influence to superstructure are both low when the points of force application are arranged reasonably.This paper adopts SAP2000 structure analysis software to eatablish the model of specimen and take nonlinear finite element analysis. friction pendulum element was taken to simulate rollers in building moving when model is established. theoretical analysis gain results that the axis force,deformation and additional force of first-story joint(shear force and bending moment) of walking beam meets the test value very well.Combining with a successful project—the multiple-use building of high technology area management committee in LaiWu, an nonlinear finite element analysis is made by using SAP2000. In the analysis, two situation including theoretical load and practical load are considered to study the influence that layout of the point of force application have on superstructure. According to the result of analysis, the layouts method that the points of force application are dispersed could decrease influence that deformation of underpining structure have on superstructure and won't do harm to the safty of moving building. So for large buildings, layout of the point of force application shoud be dispersed...