Evaluation Model And Application Of Building Vulnerability Under Landslide Disaster

The concept of vulnerability has greatly enriched the content of the risk assessment system for landslide hazards.Now vulnerability tend to an interdisciplinary,multi-disciplinary direction.And then,the factors that need to be considered are very complex and diverse.As factors which influent vulnerability are difficult to quantify(such as the impact of the population and the surrounding business environment),the study of vulnerability often stay in a qualitative or semi-quantitative level.Based on the bearing-affected system,this paper aims at providing an easy method for the quantitative calculation of vulnerability.Some factors of non-bearing-affect system are excluded from the mechanics of the affected body.Attribute point of view to consider.The impact energy calculation model under the combined effect of the disaster-bearing body and the disaster body will link the disaster-bearing body and the affected body together to build a system.Based on the basic mechanics parameters(stress,displacement,etc.)of the affected body,the system is used to characterize the system vulnerability.In this paper,the mechanism of the landside movement is analyzed,and the relationship between the horizontal force of the sliding body and the body volume and the friction coefficient is obtained by the functional relationship and the equivalent stiffness principle.Through Monte Carlo simulation,some uncertain parameters are randomly assigned to obtain the distribution of the equivalent level of the affected body to the affected body.And then select the top of the disaster relief as an indicator,the building in the landslide disaster failure probability.As well as the variation of the failure probability of the building under different slip and slip surface friction coefficients.Considering The upper structure-the foundation is used to calculate and analyze the failure probability condition of the pile foundation and the shallow foundation under the same condition by the common action model,and is compared with the cantilever beam model.Finally,the ls-dyna software is used to simulate the process of slippage-energy-shock-impact process,and the time-history analysis of the whole process is carried out.The vulnerability is quantitatively calculated by two different indexes,which is provided for the quantitative calculation of vulnerability.Through this paper,we find that the vulnerability model based on the functional relationship is used in the vulnerability analysis system,and the Monte Carlo vulnerability analysis method is adopted.In the two-dimensional conditions can effectively simplify the calculation process of vulnerability.