Subjects: Mechanics >> Solid Mechanics submitted time 2023-06-21 Cooperative journals: 《应用力学学报》
Abstract：
The ancient pagodas are mostly high-rise structures.Under long-term high-pressure stress,there are internal damage defects,which reduces the reliability of the structure.Therefore,it is necessary to evaluate the compression performance of the ancient pagoda structure and study the reinforcement method.This paper takes the bottom structure of Xuanzang Pagoda in Xingjiao Temple in Xi'an,Shaanxi Province as the prototype,and builds 2 sub-structure models at a scale of 1/8.The substructure model after compression failure is restrained by angle steel hoop.Through the compression test and numerical calculation of the ancient pagoda substructure model,the pressure performance and failure mechanism of the ancient pagoda after reinforcement are analyzed,the influence of the hoop restraint on the pressure performance of the ancient pagoda is studied,and the parameter expansion analysis is carried out.The results show that the tensile failure form at the edge of the pagoda body changes after the angle steel is used,the tensile failure range is reduced,the integrity of the structure is enhanced,the compressive bearing capacity and deformation capacity are improved. The numerical calculation results can better simulate the pagoda model mechanical performance and failure characteristics,the model's ultimate bearing capacity calculation value and the test value error are within 14%; increasing the thickness and width of the angle steel can improve the bearing capacity of the pagoda,and it can increase the thickness of the angle steel when strengthening the ancient pagoda with minor damage.When strengthening the seriously damaged ancient pagoda,the cross-sectional width of the angle steel can be increased to enhance the crack resistance and ultimate bearing capacity of the pagoda.our study Provides a theoretical basis for the safety assessment and reinforcement of ancient pagoda structures.
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