橋梁橡膠支承墊非線性行為之數值模擬

Numerical Analysis of the Nonlinear Behavior of the Bridge Rubber Bearing Device

李明山(Ming-Shan Lee)

指導教授 ： 王仲宇

國立中央大學/工學院/土木工程學系/碩士(2006年)

摘要

本論文使用顯式有限元分析軟體模擬橋梁支承系統之非線性大變形行為，並將模擬結果與真實橡膠支承墊基本性能試驗加以比較，以求得可適用於日後不同規格之合成橡膠支承墊功能之分析模擬。由LS-DYNA軟體模擬所得之結果可知，超彈性材料所得之模擬結果較優於其他材料模型所得之模擬結果。由模擬合成橡膠支承墊基本力學行為之過程，得到未來模擬橡膠支承墊時可供參考之材料性質參數範圍和模擬分析時可利用之技巧及關鍵問題。模擬所得到之橡膠支承墊基本力學性能結果，主要是用於提供未來含支承系統橋梁結構受地震力作用下之大尺度分析時，支承系統的非線性歷時反應。

關鍵字

橋梁 ； 非線性 ； 顯式有限元 ； 大變形 ； 橡膠支承墊

並列摘要

In this thesis, explicit finite element code is used to simulate the nonlinear behavior of the bridge bearing system. The nonlinear behavior of rubber bearing was investigated in detail. Three types of material models in the LS- DYNA coder were evaluated by comparing with the experimental results of the compression and shearing tests of rubber bearing. It turns out that the Hyperviscoelastic Rubber model can simulate the performance better than the Kinematic Hardening Plastic Material model and the Mooney-Rivlin Rubber model. The material parameters obtained from those validation simulations will be used to conduct the numerical analysis for other types of design of rubber bearing device.
The performance curves of the rubber bearing device in the local level can be linked with the global structural analysis of bridge structure under seismic loading.

並列關鍵字

nonlinear ； bridge ； explicit finite element ； large deformation ； rubber bearing

參考文獻

[14]吳秉憲，「橋梁功能性支承系統參數之研究-橡膠支承墊力學行為與摩擦係數測定」，國立台灣大學土木工程學研究所碩士論文，民國93年。

[3]American Association of State Highway and Transportation Officials. Standard Specifications for Highway Bridges. 17th Edition. Washington, D.C.: 2002.

[5]Gere, James M., Mechanics of Materials, Fifth Edition, Stanford University, 2001.

[6]Aklonis, John J., Introduction to Polymer Viscoelasticity, John Wiley & Sons. Inc. 1983.

[9]Ogden, R. W., Non-Linear Elastic Deformations, John Wiley & Sons. Inc. 1984.