Tibetan Folk House Numerical Simulation Analysis Of Seismic Performance

In response to national western development strategy, revitalization frontier and enrichpeople, in order to ensure frontier minority people’s life safety and build a border securitysystem as the starting point, more than90%the rural residence has not seismic design andseismic capability is unknown as the background, study seismic performance of the tibetanfolk houses, the main research content is as follows:First, through the physical and mechanical performance test of the tibetan folk housesbuilding materials (yellow mud and stone material)，clear the physical and mechanicalparameters of the main building materials.Second, base on the mesoscopic structure（This article refers in particular to the stoneand yellow mud that masonry tibetan folk house）and the understanding of the mesoscopicconstitutive relation，combine the method of stochastic analysis theory and computationalmechanics, put forward to applicable to the tibetan residence finite element discrete randomdistribution model of numerical simulation analysis, As a case study of the number194blockof wooden village named Yang Zhai, conduct model.Third, use modal analysis to give the structure dynamic characteristics, choose timehistory analysis method under horizontal earthquake excitation, simulate earthquake responseof the structure the linear and non-linear, the process of cracking and breaking through toevaluate the seismic performance.Through experiment and numerical simulation analysis give the tibetan folk physical andmechanical parameters of building materials of the main application (stone and yellow mud),use the concrete material model and DF-concrete material model of ADINAthe finite elementsoftware, determine the analysis parameters of the constitutive relation, based on the basisstudy on the kind of structure of the seismic performance. Results show that this kind ofstructure can’t meet basic seismic fortification goal. When suffering from the earthquakeinfluence of local fortification intensity(design basic earthquake acceleration value is0.15g)structure can happen large-area damage, but not collapse; When suffering from the rarely metearthquake impact of higher than the fortification intensity(design basic earthquakeacceleration value is0.3g) structure may be collapsed. At the same time, the different seismicexcitation generated excitation response larger difference, leading to standard deviation andcoefficient of variation is very big, discrete degree is very high, accounting for such structureof seismic analysis can’t continue to use traditional simplified method, only on the basis ofnumerical analysis and experimental methods to understand its dynamic response.