| Our country is an ancient civilization in the world and masonry pagodas are outstanding deputies of ancient high-rise buildings.Masonry pagodas are excellent historical-cultural heritages, by which the high-level building technologies are embodied in ancient China.While damaged naturally or artificial,many masonry pagodas are structural impaired or deviated.In light of theory of deformation of subsoil and theory of co-interaction of soil and structure,the deviation rectification technology and seismic protection are studied in this paper.The follows are in details:1.Analysis of theory of deformation of subsoil of masonry pagodasIn light of the volume settlement theory and the tri-objective deformation theory,the calculation formula of volume settlement of deviated masonry pagodas is deduced by which two edges of foundation of masonry pagodas are consider as small rigid foundations and deviation of pagodas induced by foundations is small eccentricity.Also the stability of anti-capsizal of deviated masonry pagodas is analyzed.2.Research of key technical index of deviation rectification of Drill-holes And SoftenIn light of deviation rectification of Jingguang Pagoda in Meixian County,Shaanxi Province, the soften effect of water-injection is simulated by changes of parameters of soil,the adding of injecting water is simulated by expanding of the soften volumes and the holes are simulated by volume deduction in soil,by which the whole process of deviation rectification is simulated.Also, the calculated deviated rectification is compared by that of test and the relation of water-injection and deviated rectification is analyzed.3.Analysis of influence of vibration character of masonry pagodas by co-interaction of soil and structureBased on vibration theory of structures and calculation models of co-interaction of soil and structure,the theoretical model and three-dimensional Finite Element Method model are set up either co-interaction of soil and structure included or excluded.The vibration characters of Small Wild Goose Pagoda are calculated and the results are compared by test.4.Seismic response analysis of masonry pagoda based on co-interaction of soil and structureIn light of theory of co-interaction of soil and structure,seismic response analysis of Xuanzhuang Pagoda in Xingjiao Temple has been done in Xi'an has been done either include co-interaction either exclude.Then the effect of co-interaction to seismic response of masonry pagodas and location of weak floors is analyzed.5.Research on method for integrated seismic resistant evaluation and strengthen technology of masonry pagodasBased on past seismic disasters and current seismic resistant appraisal methods,the integrative seismic resistant appraisal method for masonry pagodas is brought forward.By the method,seismic resistant performance of Xuanzhuang Pagoda has been appraised and seismic resistant strengthen plan is given according to result of evaluation.The mainly original points are as follows:The theories of co-interaction of soil and structure are applied in deviation rectification and seismic resistant protection of masonry pagodas firstly.That can be taken as theoretical basis for protection to structures of masonry pagodas.Following are in details:1.The numerical calculation model of rectification deviation is founded and numerical simulation of whole process of deviation rectification of masonry pagoda is achievedThe numerical model of deviation rectification of Jingguang Pagoda has been established.By modulating of controlling index of deviation rectification,the whole process of the pagoda has been simulated.The rectification value of calculation is compared by that of test and the relationship of volumes of water injected and rectification value has been studied.As a result, controlling of the process of deviation rectification is achieved.2.In light of theories of dynamical co-interaction of soil and structure,the rules of vibration characters and seismic response of masonry pagodas impacted by co-interaction of soil and structure are discoveredIn light theories of co-interaction of soil and structure,the theoretical model and numerical model of co-interaction of soil and structure of masonry pagoda are founded.By analysis of vibration character and seismic response of masonry pagoda both including co-interaction and exclude,the rules of vibration characters and seismic response of masonry pagodas impacted by co-interaction of soil and structure are given. 3.The seismic resistant appraisal model is given and the integrative appraisal method is foundedBy analysis of past seismic disasters and seismic resistant mechanism,the integrative seismic resistant appraisal model of masonry pagodas has been set up in light of seismic resistant appraisal methods of buildings.And the value standard of each index in the model and appraisal method have been given based on investigation of seismic disasters of masonry pagodas and some related research. |
