Seismic Test And Elastic-plastic Seismic Response Analysis Of Masonry Structure

Our government has always attached great importance to protecting against andmitigating earthquake disasters, in particular, paid attention to people’s lives and propertysafety. The earthquake disaster emergency rescue and rural comfortable housing and schoolproject are important parts of the protecting against and mitigating earthquake disasters work.Based on satellite remote sensing, geographic information systems,3D simulation,earthquake damage prediction techniques etc, the simulation technology of seismic disasterscene can be used for decision support of earthquake relief, the virtual training of theemergency rescue, earthquake science education. And it is an important means to improveChinese capacity of earthquake disaster prevention and reduction. As the main structure typeof rural buildings, the damage of masonry structure is an important cause for a large numberof personal injury and property loss in previous earthquakes. The seismic test and damageanalysis of masonry structure are necessary ways to realize comfortable housing and schooltarget, and are also important theoretical basis of the simulation technology of seismic disasterscene. Therefore, the seismic test and damage analysis of masonry structure and research ofsimulation technology of seismic disaster scene should be the focus of the academic study ofearthquake engineering and engineering mechanics. They have great significance to Chineseprotecting against and mitigating earthquake disasters work.Based on the work of former researchers, some researches were carried out such as thetypical damage, failure mechanism, earthquake resistant measures, elastic-plastic seismicresponse analysis and shaking table test of masonry structure. More than that, the building of3D building model and implementation technology of disaster scenes was also studied in thispaper. The following researchs were mainly done:Firstly, seven typical masonry school buildings in Wenchuan earthquake, located in LeiguTown of Beichuan County, were introduced detailedly and their damage reasons andconstructional measures were analysed. By developing floor seismic capacity index intocollapse resistant capacity index, the collapse resistant capacity of seven masonry schoolbuildings were analysed. Some suggestions were proposed for earthquake resistance ofmasonry structures in rural comfortable housing and school project.Secondly, the main process of shaking table tests of a70m2masonry building wasintroduced detailedly, which was one part of serial shaking table tests of the seismic strengthening for comfortable housing project of farmers and herdsmen in Tibet. The damage,dynamic characteristics and measuring point reactions of the model structure were analyzed.Based on test results, the seismic capacity of prototype structures was evaluated. Somesuggestions were proposed for seismic reinforcement, design and construction of buildings incomfortable housing project of farmers and herdsmen in Tibet.Thirdly, finite element software ABAQUS was used to simulate the shaking table test ofthe model structure. And the result reliability of finite element simulation and tests werevalidated by comparing analysis. On this basis, considering that the material strengths ofprototype structure provided by owner were higher than actual strengths, the finite elementmodels based on the actual material strength were created. According to the numericalsimulation results, the seismic performance of the prototype structure was analysed.Fourthly, the typical damage phenomena and characteristics of masonry structures weresummarized and their reasons were analysised. Earthquake damage differences of the fortifiedstructure with non-fortified structure were discussed combined of actual damage. Based ondamage data and expertise, seismic damage distribution laws of masonry structure were givenin different floors and different parts of same floor under different earthquake damage level.The damage characteristics and the revelation of the Wenchuan earthquake were summarized,and earthquake resistant measures of the masonry structure and suggestions were proposed.Fifthly, a large number of3D building models were created by3Ds MAX, Photoshop,Auto CAD and other software. And the damage model databases of different grades were alsocreated. The method to create intact and damage3D building models were given and theteacher residential building were taken to as an example, which located in Xuankou middleschool of Yingxiu town and damaged in Wenchuan earthquake.Sixthly, based on GIS software, the3D topography of the earthquake scene was created.And then, taking Shishi city, Fujian province as an example, pre-disaster scene was created, inwhich the3D blocks were used to replace3D buildings. By using different colors to representdifferent damage levels, the3D building block disaster scenes were created in any seismicintensity field. The3D intact building model scenes were created and the damage scenes werealso created by model replacement.