Frame Structure Building Blasting Took Dynamic Analysis And Numerical Simulation

As a special building demolition blasting demolition method,is widely used in urban old buildings in the demolishing engineering.Using directional blasting demolition of frame structure building,if the building demolition collapsed to produce larger recoil,will cause certain influence to the surrounding buildings and public transportation,and may even cause serious loss or serious accident.Therefore,high-rise frame structure then sit can get effective control of blasting demolition of buildings,is a measure of high-rise frame structure effect of blasting demolition of buildings of important considerations.Blasting sat based on the frame structure theory as a guide,according to the principle of mechanics,blasting cut height is put forward too much is bad for buildings collapsed,and the reasonable blasting height of blasting demolition of frame structure are derived.-combined with an engineering example,the use of ANSYS ls-dyna to establish numerical model of frame structure collapse blasting,the simulation result was consistent with actual situation,and shows that the numerical simulation method estimates building blasting took is feasible;By directional blasting of 12 layer frame structure building simulation analysis,put forward the frame structure building demolition,to overturn torque,small produce sat,blasting cut height should be chosen in the frame structure of center of gravity H0;To make a building blasting took small rear pillar also want to fry,blasting height only in the back row column root formation of rotating hinge;If the back post not fry,should weaken the strength of column root,in order to ensure the building on the column root stress fracture formation with rotating hinge;To stop building in blasting took,can use at the back post building roots slag heap of a certain height and strength of soil.