The Dynamic Characteristics Research Of The Masonry Pagodas Test Model In The Soil-structure Interaction

Ancient masonry pagodas are China’s major high-rise building, it combines the best of the architectural art of Chinese and foreign culture tradition, which reflects the technical level of China’s ancient architecture. Existing brick and masonry pagodas, are being human and nature’s infringed, and after the Wenchuan earthquake, brick and masonry pagodas more severely damaged, so the awareness of pagodas increased. Long years people assumed in the study of ancient pagoda building Foundation’s rigid, and the calculation model is only concerned with the upper structure, but the actual pagoda structure is always been built on the soil that it will bring certain calculation errors, At the same time,the research about the height, width of foundation changes on the effects of the dynamic characteristics of masonry pagodas, also still in infancy.The paper has took into account already existing results about on a masonry pagodas, such as the establish a scale model of brick and masonry pagodas, changing soil parameters, testing dynamic characteristics of brick and masonry pagodas, combining with the numerical simulation to study soil effects of different factors on dynamic characteristics of ancient pagoda structures. The paper includes the following major elements:(1) Summered research status of the masonry pagodas soil-structure interaction, and according to the history and archaeological data, analyzes of development and structural characteristics of ancient pagodas in China and the masonry pagoda-structural role theory;(2) Builded the one-fifteenth scale pagoda model from the prototype of masonry pagodas, steed the different thickness of soil layer in order to change the affection of ancient pagoda structures on the Foundation, tested the dynamic characteristics of ancient pagoda structures under different conditions, as well as the formation of the natural cycle, vibration damping ratio;(3) Applied ANSYS software on calculation, build the pagoda in the numerical calculation model under different soil height, analysis of dynamic characteristics of tower structure by modal analysis, get the soil height’s influence on the test model of pagoda. At the same time, the simultaneously results and the test results has been compared, so it proved the ANSYS results is accurate. Lastly, defined the ground plane sizes on vibration frequency to summary the interaction of soil-structure in different Foundation.Simulation of the foundation soil elastic modulus change influence on the test model of pagoda, explore the effect of foundation stiffness on the dynamic characteristics of the upper structure.(4) Summered the affection on dynamic properties of brick and masonry pagodas in different height and width of soil, applied finite element theory on Longhu Pagoda in Deyang, Sichuan province, after compared the observed data to demonstrate this article’s result can get application, so it provides theoretical basis for future model of the interaction of soil-structure researching.