Stress Performances Of The Slab Foundation In The Lift-up Process Of Buildings

Along with national economy's swift development,the urban road traffic condition progressive improvement,the urban planning consummates unceasingly,the old city transformation and the path expand project to be getting more and more,many buildings have affected the urban reconstruction and the path expand,some building which still had the use or the retention value must carry on the whole displacement,has the obvious social efficiency and the economic efficiency.This article studies the anti-punching shear performance of base plate while jacking up with the different structural types under the different ground condition through the model experiment at lab,and obtains collapse shape,stress distribution and relation between load and distortion of the foundation plate through the experiment,and analyzes power transmission and destruction mechanism of foundation plate after cracking.The paper considers that the power transmission mechanism of the cracked foundation plate is like as "tension bar arch",and the destruction is mainly due to punching resulting from the insufficient capacity of shearing press zone.Finally,the paper proposes the punching and bending model the foundation plate to provide the reference for the engineering design.