عنوان انگلیسی: Nonlinear collapse simulation of Daikai Subway in the 1995 Kobe earthquake: Necessity of dynamic analysis for a shallow tunnel
سال نشر: ۲۰۱۹
نویسنده: Chih-Chieh Lu,Jin-Hung Hwang
تعداد صفحه فارسی: ۲۰ – تعداد صفحه انگلیسی: ۱۳
دانشگاه: Department of Civil Engineering, National Central University, No. 300, Jhongda Rd., Jhongli City, Taoyuan County 32001, Taiwan, ROC,National Center for Research on Earthquake Engineering, No. 200, Sec. 3, Xinhai Rd., Taipei 10668, Taiwan, ROC
نشریه: Process Safety and Environmental Protection
کیفیت ترجمه: ترجمه پلاس
چکیده
این تحقیق پویای تحلیل زمان – تاریخچه و تغییر شکل‌های هندسی مقطع عرضی اصلاح‌شده (MCSRD) را به همراه مدل‌های غیر خطی زمین ساختی برای بررسی دقیق عملکرد غیر خطی که با مشاهدات میدانی همخوانی دارد، ترکیب می‌کند. با توجه به روش MCSRD، قسمت اصلی "ستون مرکزی" شناسایی می‌شود اما عوامل تحمل فشار داخلی به وضعیت به خصوصی محدود نمی شوند.
Abstract
This research conducts dynamic time-history analysis and a modified cross-section racking deformation (MCSRD) method to analyze the collapse mechanism of the Daikai Subway during the 1995 Kobe earthquake using FLAC2D. A simplified approach to consider the nonlinear behavior of a structure element is imported and combined with the FLAC2D built-in nonlinear soil constitutive models to accurately consider the nonlinear interaction between the soil material and structure. Based on the proposed framework, the damage evolution process of the Daikai Subway station can be traced by the dynamic time-history analyses. The collapse pattern roughly agrees with field observation. Regarding the MCSRD method, the critical member of the “central column” is identified but the internal forces did not reach its limit state; this may be because inertial force is neglected, which is a characteristic of the pseudo-static method. Therefore, it is recommended to conduct dynamic time-history analysis for a sha
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