核岛钢平台支撑框架抗震性能试验对比及支撑优化布置研究  

Comparison of seismic performance tests and optimization of the brace layout of a nuclear island steel platform braced frame

作　　者：丁振坤 胡宝琳[2] 田华 胡吴彪 闵昱钧 徐世安 DING Zhenkun;HU Baolin;TIAN Hua;HU Wubiao;MIN Yujun;XU Shian(Shanghai Nuclear Engineering Research&Design Institute Co.,Ltd.,Shanghai 200233,China;School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200233 [2]上海大学力学与工程科学学院,上海200444

出　　处：《振动与冲击》2023年第22期60-70,共11页Journal of Vibration and Shock

基　　金：国家科技重大专项(2018ZX06001001);国家自然科学基金(52078287)。

摘　　要：针对核岛钢平台框架“强梁弱柱”的建筑结构形式,为研究不同的支撑结构对其抗震性能改善的影响,分别对普通支撑框架(braced moment resisting frames,BMRF)试件和屈曲约束支撑框架(buckling-restrained braced frames,BRBF)试件进行了拟静力试验,对比研究了不同钢框架试件的抗震性能,包括滞回曲线、骨架曲线、等效阻尼比、强度和刚度退化情况等。试验结果表明了BRBF受力性能的优越性,其极限变形能力和耗能能力分别较BMRF提高了88.67%和654.90%。进一步采用数值分析研究屈曲约束支撑布置方式对核岛钢平台子结构整体受力性能的影响。模拟结果表明,在三种不同的支撑布置方式中,单斜撑型布置方式不仅可以提高核岛钢平台整体结构的抗震性能,还可以改善原结构的受力性能。Considering the “strong beam and weak column” architectural structure of a nuclear island steel platform frame structure,in order to study the influence of different brace structures on its seismic performance improvement,mechanical properties tests under pseudo static loading were carried out on braced moment resisting frames(BMRF) and buckling-restrained braced frame(BRBF) specimens,respectively and the seismic performances of different steel frame specimens were studied and compared,including hysteresis curves,skeleton curves,equivalent damping ratio,strength and stiffness degradation,etc.The test results show that the BRBF is superior in mechanical performances,and its ultimate deformation capacity and energy dissipation capacity are 88.67% and 654.90% higher than those of the BMRF.On this basis,numerical analysis was adopted to further study the effects of buckling-restrained brace layout on the overall mechanical properties of the nuclear island steel platform sub-structure.The results of numerical analysis show that among the three different bracing layouts,single inclined buckling-restrained brace layout can not only improve the seismic performance of the whole structure,but also improve the mechanical performance of the original frame structure.

关 键 词：核岛钢平台 抗震性能 拟静力试验 支撑布置方式 对比分析 

分 类 号：TU318.1[建筑科学—结构工程] TU391