NONLINEAR ANALYSIS OF SLIDE ELASTOMERIC BEARINGS OF PRESTRESSED SHALLOW RETICULATED SHELLS DURING ERECTION
There are two main purposes to prestress a long/medium span column-supported shallow reticulated shell along its tensile stress trajectories or boundary edges: (1) to decrease its deflection and (2) to approximately make the shell a self-balance entity on the horizontal plane. The exerted prestressing forces make the columns mainly work at the compression state of little eccentricity under normal service conditions.When prestressing the shell during construction, large horizontal deflections occur at its supports. In some projects elastomeric bearings are adopted because it can also provide damping. Exact analysis of elastomeric bearing of frictional slide contact requires much time and the results are not easy to obtain. In the paper a simplified model of frictional slide contact elastic element is proposed. In the process of iteration, the discontinuous stiffness of the element is expressed as a hyperbolic tangent function for the benefit of computer programming, and an improved formula of imbalance force vector is used to accelerate convergence. An actual structure is taken to verify the reliability of the element. Analysis shows that the relative errors between computed results and measured values are very small.
nonlinear analysis slide elastomeric bearing prestressed shallow reticulated shell
J C Xiao K X Gou J K Liu Y Liu
Guizhou University, China Dalhousie University, Canada
国际会议
The 9th International Conference on Steel Space & Composite Structures(第九届国际钢材、空间结构、组合结构会议)
烟台·北京
英文
421-430
2007-10-10（万方平台首次上网日期，不代表论文的发表时间）