Soil-structure interaction of ancient masonry structure in Chiangmai under seismic excitation

Abstract

There are several researchers developed the analytical procedures for evaluating the response of soil-structure interaction under seismic loading. To obtain the good result for determining ground response in specific cases, it is essentially dependent on the correct representative soil properties in the analysis. Consideration effort has also been directed toward the determination of soil properties for use in these analytical procedures. The response is determined mainly by shear modulus and damping characteristics of soil. Chediluang (Pagoda), located in Chiangmai province in the northern part of Thailand. The structure made from ancient masonry in several hundred years ago. The main purpose of the research is to investigate the seismic resistance capacity of the Chediluang, which was partly torn down by past earthquake with the soil-structure interaction under seismic excitation. The finite element method is used for dynamic analysis. The input parameters such as Poisson’s ratio, compressive and tensile strength, shear modulus and shear wave velocity are selected from the report and in-situ testing. The stress of the structure under dynamic condition is considered. In addition, the time-history of acceleration plots and stress contour used for determining the weak zones of the structure are also reported for further restoration solutions. From the analysis, the structure is able to resist the compressive stress but some part of the structure is unable to resist the tensile stress. Some reinforcement is required for next restoration.