【摘要】 为了探讨玻璃纤维增强塑料(GFRP)隔震支座中的GFPR板在冻融、海蚀和老化条件下的力学性能劣化规律，综合考虑冻融、海蚀和老化条件下GFRP隔震支座的材料组成和所处环境的情况，确定GFRP板性能变化是GFRP隔震支座性能变化的主要因素之一。通过推导得出了GFRP隔震支座GFRP板层合板理论公式。对32个GFRP隔震支座分别开展冻融、海蚀和老化试验，分析试验前后GFRP板的力学性能劣化规律和极限失效规律。运用推导得出的理论公式，计算并分析支座中的GFRP板随环境因素力学变化规律。试验和分析结果表明:对拉伸性能变化率而言，海蚀试验试件最大，老化试验试件次之，冻融试验试件最小;而对层间剪切性能变化率而言，海蚀试验试件最大，冻融试验试件次之，老化试验试件最小。冻融、海蚀和老化条件下，GFRP板竖向应力、环向应力和径向应力都呈现出从板中心向板边缘逐渐递减趋势。更多还原

【Abstract】 In order to investigate the mechanical performance deterioration of GFRP plate of GFRP isolation bearings under freeze-thaw,sea erosion and aging conditions,considering the material composition and environment of GFRP isolation bearing under freeze-thaw,sea erosion and aging conditions,it was determined that the performance change of GFRP plate is one of the main factors for the performance change of GFRP isolation bearing. The theoretical formula of GFRP plate for GFRP isolation bearing was derived through derivation. 32 GFRP isolation bearings in freeze-thaw,sea erosion and aging conditions tests were carried out,and the mechanical performance deterioration variation law and ultimate failure law of GFRP plate were analyzed before and after the test. Based on the theoretical formula,the mechanical variation of GFRP plate in bearing with environmental factors was calculated and analyzed. The results of test and analysis show that for the change rate of tensile properties,the sea erosion test specimen is the largest,the aging test specimen is the second,and the freeze-thaw test specimen is the smallest,while the change rate of inter-laminar shear properties is the largest,the freezethaw test specimen is the second,and the aging test specimen is the smallest. No matter the freeze-thaw,sea erosion and aging conditions,the vertical stress,circumferential stress and radial stress of GFRP plate decrease gradually from the center to the edge of the plate. It is concluded that the circumferential stress and radial stress of GFRP sheet are decreasing in sea erosion,aging and freeze-thaw conditions. It is proved that the internal GFRP theoretical formula of GFRP rubber bearing can be used as the theoretical basis for the optimal design of this kind of rubber bearing.更多还原