Development of a modified Mooney-Rivlin constitutive model for rubber to investigate the effects of aging and marine corrosion on seismic isolated bearings  

作　　者：Zhao Guifeng Ma Yuhong Li Yanmin Luo Jiarun Du Chang 

机构地区：[1]School of Civil Engineering,Guangzhou University,Guangzhou 510006,China [2]Earthquake Engineering Research&Test Center,Key Laboratory of Seismic Control and Structural Safety,Guangzhou University,Guangzhou 510405,China [3]Shanghai Construction Engineering Technology Co.,Ltd.Shanghai 200062,China

出　　处：《Earthquake Engineering and Engineering Vibration》2017年第4期815-826,共12页地震工程与工程振动（英文刊）

基　　金：National Natural Science Foundation of China under Grant Nos.51578170 and 51678173;National Basic Research Program of China(973 Program)under Grant No.2011CB013606;Program for Changjiang Scholars and Innovative Research Team in University(IRT13057);Natural Science Foundation of Guangdong Province,China(2017A030313298);Science and Technology Program of Guangzhou,China(1201421152 and 201707010295)

摘　　要：In this study, aging and marine corrosion tests of a large number of rubber material and rubber bearings have been carried out. The constitutive Mooney-Rivlin model parameters for a rubber isolated bearing have been determined. By applying the least-square method to the experimental data, the relationships between the aging time and the marine corrosion time with the constants in the constitutive model for a rubber beating have been derived. Next, the Mooney-Rivlin model has been modified accordingly. Further, using the modified Mooney-Rivlin model and the Abaqus software, the performance of the rubber isolated bearings has been simulated. The simulation results have been compared to the experimental results so as to verify the accuracy of the modified model. The comparison shows that the maximum errors for the vertical and horizontal stiffnesses are 16.8% and 0.49%, respectively. Since these errors are considered acceptable, the accuracy of the modified constitutive model can be considered verified. The results of this study can provide theoretical support for the performance study on rubber isolated bearings under the complex ocean environment and the life-cycle performance evaluation of bridges and other offshore structures.In this study, aging and marine corrosion tests of a large number of rubber material and rubber bearings have been carried out. The constitutive Mooney-Rivlin model parameters for a rubber isolated bearing have been determined. By applying the least-square method to the experimental data, the relationships between the aging time and the marine corrosion time with the constants in the constitutive model for a rubber beating have been derived. Next, the Mooney-Rivlin model has been modified accordingly. Further, using the modified Mooney-Rivlin model and the Abaqus software, the performance of the rubber isolated bearings has been simulated. The simulation results have been compared to the experimental results so as to verify the accuracy of the modified model. The comparison shows that the maximum errors for the vertical and horizontal stiffnesses are 16.8% and 0.49%, respectively. Since these errors are considered acceptable, the accuracy of the modified constitutive model can be considered verified. The results of this study can provide theoretical support for the performance study on rubber isolated bearings under the complex ocean environment and the life-cycle performance evaluation of bridges and other offshore structures.

关 键 词：isolated rubber bearing marine corrosion AGING Mooney-Rivlin model finite element analysis 

分 类 号：P755.3[天文地球—海洋科学] TU352.12[建筑科学—结构工程]