Papers by Author: Jing Cao

Abstract: In order to analyze the effect of foundation pit excavation on surrounding buildings, this paper researched the ground surface deformation surrounding excavation engineering, analyzed the buildings additional internal forces change mechanism and the coordination of the building foundation and the ground; The damage were researched on foundation subsidence, ground tilt, surface curvature, torsion and other factors on surrounding buildings and affiliated facilities after excavation. Established an interaction theory model of the buildings foundation and ground, used the model could calculate the changes of internal force and deformation of surrounding buildings caused by foundation pit excavation by selecting the reasonable foundation settlement equation or using the measured settlement data. So this paper provided a theoretical calculation method to engineers to calculate the effect of excavation engineering on surrounding buildings.

Abstract: This paper analyzed natural vibration frequencies and vibration modes of suspend-dome structure with finite element method. Firstly, to get the corresponding vibration mode of each frequency of the structure, understand the distribution of directional stiffness in the structure, and realize the basic natural vibration characteristics, this paper analyzed the natural vibration characteristics of suspend-dome structure. And then, this paper analyzed such four parameters as rise, roofing mass, sectional stiffness of the rods, and prestress in the cables. Through comparison of the four parameters, we can get the similarities and differences among their frequencies and vibration modes, and whether or not the mass and the stiffness are harmonious, and draw some valuable conclusions for structural design.

Abstract: As a new type of structural form, the suspend dome structure combines both advantages of the single layer reticulated shell structure and the cable dome structure. The anti-seismic performance of suspend dome have been analyzed by employing a computational model of the Kiewitt suspend dome with 40m span．The different seismic behaviors of time history analysis and response spectrum analysis are analyzed and compared. Some valuable conclusions are drawn for practical design. The results of anti-seismic analysis indicated that the components of the structure were in the elastic period，and had a good anti-seismic performance under 8 degree（0.2g）earthquake.