Seismic Hazard Assessment Of Masonry Pagodas

Based on the hazard background and cultural heritage situation of ourcountry,national cultural relics departments put forward "immovable cultural heritagehazard assessment and construction of hazard prevention system" project. This projectfocus on the current disaster prevention and reduction situation of cultural heritageunder all kinds of natural hazard in China, by analysis the hazard assessment of culturalheritage method fits to China’s national conditions.and build the overall framework ofhazard prevention and mitigation research in our country。Put forward our culturalheritage hazard prevention and mitigation system of technical standards.Proposed ofcultural heritage hazard prevention and mitigation technology standard system.Toprovide professional support for the cultural relics administrative departments toimprove the macro decision-making capacity of the immovable cultural relicsprotection,and accumulate of research-based hazard assessment system for China’scultural heritage.(1) Use Theoretical fragility method to analysis seismic hazaed by numericalsimulation.The vertex displacement angle of the selection structure, the maximum storydrift angle as the seismic demand parameters (structural seismic response), peak groundacceleration of ground motion intensity parameters.Use finite element software toanalysis pagoda model,obtain the relationship between the demand for seismicparameters and ground motion intensity parameters.Explore the structural responseindicators in each damage state boundaries.Calculated as the typical damage state, thevibration intensity structure around the state to destroy the conditional probability todraw structure seismic fragility curve.(2) Analysis.the ancient Masonry Pagodas structure of probabilistic seismichazard.First First continuous vulnerability curve discrete continuous vulnerability curve discrete.obtain the seismic vulnerability matrix.Calculated the probability of damage ofthe structure.Combined with masonry pagoda value characteristics,assess its materialvalue and non-material values.Identified various types of Guta loss ratio curve in eachdamage state.Take Xi’an Small Wild Goose Pagoda as an example to calculatedstructure value of t probabilistic seismic hazard.(3)Use empirical methods to analyze the vulnerability of the ancient tower structure,and take Xi’an Small Wild Goose Pagoda as an example to assessment its fragility,seismic damage and seismichazard value.Discuss It’s seismic hazard likely to suffer inthe future.Contrast to the results obtained by the two methods to analysis the advantagesand disadvantages between them.The results show that the structural fragilityand hazardvalue obtained by empirical method is higher than the theoretical calculations.Theresults show that the structural fragilityand hazard value obtained by both method arebasically equal.The results of this study can provide a basis reference for Ancient Masonry Pagodascultural heritage seismic hazard assessment methodology.