Elastic–plastic Dynamic Analysis And Damage Assessment Of Rc Frame Structure Under The Condition Of The Mining

China’s compressed coal under buildings is very serious, coal is mined will causethe movement and deformation of surface, leading to the top of the building havesome distortion and damage, if these buildings which has the initial deformation andinitial damage under the earthquake, the failure mechanism will be more complicated,Therefore, the mechanism of such building disaster，development of protectionmechanisms, On the liberation of the compressed coal under buildings and theprotection of mine area’s building has important practical significance.Therefore,relying on the natural science foundation (The Foundation theory research on thedouble protects to the structures from the earthquakes and the mining, No:50804026),for the engineering practice of the damage to buildings by mining and the damage byearthquake, researching the laws of building damage caused by surface deformationand the disaster mechanism under the action of strong earthquakes, consideringmaterial softening, strength degradation of nonlinear factors,using the finite elementsoftware of ANSYS, established a high level of reinforced concrete frame structureFEM model, analysis for the structure under the influence of mining and mining-earthquake of coupling effect,The main contents as following:⑴Research background and meaning of the paper are firstly introduced,Theeffect to construction from mining and earthquake are summarized,proposed miningarea’s building should be established resistance to deformation-earthquake resistancedouble protection mechanism;⑵Detailed discussion of the mining the mechanism of surfacebuildings,describes the focus characteristics of building damage on conditions in themining influence;⑶Disscus the plastic model of reinforced concrete structures by structural,component units,materials three levels, and comparative analysis of different modelsand analysis of strengths and weaknesses.Use the ANSYS bilinear kinematichardening model(BKIN), defines the elastic-plastic model structure model of beam and column component nonlinear characteristics, to achieve the structureelastic-plastic FEM model;⑷Introduces the basic concepts of structural damage,review of the currentvariety of different levels material level, component level, structure level status of thedamage model, and the two parameters damage model of reinforced concretestructures were described in detail by analysis and comparison of selected damagemodel for this article;⑸Use ANSYS finite element software to achieve a high level of reinforcedconcrete frame structure FEM model,create a reasonable boundaries and selecting theappropriate method of load is applied, successful simulation of the the state ofstructure under the influence by the mining and mining-earthquake of couplingeffect；⑹The effect from mining to construction is analyzed by the software ofANSYS, the change and distribution rule of internal force is get in the process of earthdeformation caused by mining.⑺Selected in a reasonable way in ANSYS, the success of the mining impactand earthquake,a " Static" and a " Dynamic" both the role of coupling. Through theTime-History dynamic analysis to the damaged RC Frame structure at each stage ofmining process, the change and development rules for all kinds of displacements,time-history curves;⑻Do the two parameters damage model analysis of the whole structure forreinforced concrete frame structure, it is obtained that the rules of damage underdifferent degree of mining effect and earthquake are concluded.