Hongbo Liu

Integral Analysis of Shallow Ellipsoidal Suspend-Dome with Elastic Restraint

Tianjin Baodi Gym is an engineering example of suspend-dome with shallow ellipsoidal shell with elastic restraints, supported on the lower reinforced concrete structure. The single model of the suspend-dome and the integral model that consists of the lower structure are established, and the static behavior, dynamic behavior and overall stability of both models are studied. Then a parametric analysis considering the effect of the rise to span ratio, the relative stiffness of the upper structure and the support stiffness is conducted, and the key parameter influencing the structural behavior is obtained. Results show that the effect of the lower structure on the static behavior of the suspend-dome is little, however, the support reaction can be significantly reduced. In addition, the integral effect has a great impact on the dynamic behavior and overall stability of the suspend-dome. Thus integral analysis should be carried out to guarantee the safety of the structure.

Structural Design and Analysis of Aluminum Dome for Caofeidian Coal Storage

The upper part of Caofeidian coal storage was approximately hemispherical aluminum shell, covered with aluminum alloys plate. The capsule was made of aluminum alloys material, and its span was 125 meters. In the design, according to TEMCOR joint, we used the finite element software MIDAS to build the accurate geometry models and calculation models of aluminum alloys single layer latticed dome structures. By the combination of constant loads, live loads, snow load, wind load, temperature effect and other working conditions, we summarized the consumption of aluminum of the structures, and studied the structural internal force, structural deformation and structural stiffness. In addition, the X and Y two different direction seismic dynamic load was applied to the structure. The structural seismic performance under two kinds of modes were studied through the structure mode analysis of the vibration frequency. The vierendeel dome and single layer dome were controlled by the stability. ANSYS three-dimensional frame element model were set up, and the eigenvalue buckling analysis was carried out. By the geometrical nonlinear finite element method, combining with initial imperfections and material nonlinear, we found out the stability coefficient and the weak parts of the structure.