Seismic Response Analysis Of A Frame-shear Wall Structure Across Ground Fissure In High-intensity And Multidimensional Multipoint Earthquake

Generally under seismic action, the width of the ground fissure will increase. Itleads to the intersected secondary fracture near the primary fracture to become thechannel of upward movement of deep soil, resulting in the differences on the intensity,frequency and the initial moment of the input seismic wave excitation both sides ofground fissures, which make the structure's earthquake damage mechanism complicated.At the same time, the characteristics of ground fissure's three dimensional displacementactivity probably make the vertical seismic action's the influence on the crossing groundfissure structure more bigger. In a word, the multidimensional multipoint effect ofseismic will bring about unexpected adverse effects on the buildings located on thecrossing ground fissure.Based on the phenomenon that most ground fissures have tended to be in thestability of the low rate state in the past two decades in Xi'an and the earthquakes occurmore frequently in our country in recent years, the thesis aims to use the finite elementsoftware SAP2000to make a nonlinear time-history analysis with the three-dimensionaldisplacement activity characteristic of ground fissures as a foundation. The researchobject is a building of frame-shear wall striding ground fissure in Xi'an. In this thesis,the vertical settlement and horizontal tension of the ground fissure are applied to thebearing of the different SAP2000finite element models in the form of initialdisplacement. By the nonlinear time-history analysis of the finite element modelswithout prevention measures under high-intensity multidimensional and multi-pointseismic and high-intensity multidimensional and consistent excitation seismic as well as the nonlinear time-history analysis of the finite element models after setting settlementjoint under high-intensity multidimensional and multi-point seismic and high-intensitymultidimensional and consistent excitation seismic, it reveals a series of researchresults?such as the development trend of plastic-hinge?the stress nephogram of shearwall's concrete and rebar?the elastoplastic interlayer displacement angle curve. With thecontrastive analysis, it clearly shows the characteristic and performance of thesebuildings on the crossing ground fissure under multidimensional and multi-pointseismic action and multidimensional and consistent excitation seismic action, whichprovide an important reference for further study the function of ground fissure on thebuilding structure's damage mechanism and the prevention measures about thebuildings on the crossing ground fissure.