P波斜入射下非基岩场地中核岛结构地震响应规律研究 |
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引用本文: | 赵密,王鑫,钟紫蓝,杜修力.P波斜入射下非基岩场地中核岛结构地震响应规律研究[J].工程力学,2020,37(12):43-51+77. |
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作者姓名: | 赵密 王鑫 钟紫蓝 杜修力 |
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作者单位: | 北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124 |
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基金项目: | 国家自然科学基金项目(51738001,51421005);教育部创新团队发展计划项目(IRT_17R03) |
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摘 要: | 随着我国核电产业飞速发展,核电站厂址的选择将不可避免地遇到非基岩场地。针对地震动斜入射下非基岩场地中核电结构抗震问题,建立了包括CAP1400核岛结构和岩土场地的土-结构系统三维有限元模型,基于黏弹性人工边界和斜入射地震动输入方法,研究了P波斜入射角度和非基岩分层场地对核岛结构地震响应的影响规律。研究表明:非基岩场地将增大核岛结构加速度响应和楼层反应谱,多数条件下也将增大楼层相对位移;P波入射角度增大,核岛结构竖向响应减小、水平响应增大,楼层反应谱的频谱特性发生改变。
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关 键 词: | 核岛结构 抗震分析 人工边界条件 斜入射 非基岩场地 |
收稿时间: | 2019-12-11 |
STUDY ON SEISMIC RESPONSES OF NUCLEAR ISLAND STRUCTURE IN NON-BEDROCK SITE UNDER OBLIQUELY-INCIDENCE OF P WAVES |
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Affiliation: | Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China |
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Abstract: | With the fast development of nuclear power industry in China, it is inevitable to encounter non-rock site during site selection. Focusing on the seismic response of the nuclear island in non-bedrock site under oblique incidence, a three-dimensional finite element model for the soil-structure system including the CAP1400 nuclear island structure and near-field rock site is established. Based on the viscous-spring artificial boundary and oblique incident ground motion input method, the influence of oblique incident angle of P-wave and non-rock layered site on the seismic response of the nuclear island is studied. Research shows that non-bedrock site will increase the acceleration response of the nuclear island structure and its floor response spectrum, and in most conditions will also increase the relative floor displacement; As the incident angle of P wave increases, the nuclear island structural vertical response decreases, the horizontal response increases, and the spectral characteristics of the floor response spectrum will change. |
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