| Xi’an is one of the most severely affected cities that suffer from damages caused by ground fissures.The direct damages are decreasing because of avoiding measures,but the indirect damages like land wasting are increasingly severe.The land loss caused by ground fissures in Xi’an plays a big role in ground fissures hazards nowadays.The direct damage of the cross-ground fissure strip foundation is the most typical,which was caused by Xi’an ground fissures.Former study on the ground fissure disaster investigation in the past is focusing on the damage caused by ground fissures.In this paper,indirect influences in a economic perspective that the land wasting causes GDP losses of Xi’an are studied.Estimate the economic value of the residential land and the area of the land avoided from ground fissures.The analytic hierarchy process(AHP)is used to calculate economic values quantized from the proportion of construction lands in the city.The economic loss caused by the avoiding land 32 billion 300 million yuan is finally calculated.The failure mechanism of strip foundation crossing the ground fissures is simulated by FLAC3D finite element software in this paper.By establishing the finite element model of strip foundation in the ground fissure inclination angle of 60 degrees,75 degrees,90 degrees.And the displacement,maximum stress,shear strain and yield area of different stages based on different load situations are obtained to explore influence of ground fissures on the strip foundation under different dip angles.It is concluded that the little influence of the ground fissure inclination on the strip foundation of the ground fissuresThe settlement of the strip foundation frame structure crossing the ground fissures is simulated by SAP2000 to explore the timing of using the Partial Removal Method.Through the change of structural internal force.The application time of the Partial Removal Method is that after the failure of the superstructure beam,the failure of the frame column. |
