استنتاج معادلات جدید برای تخمین بیشینه شتاب و سرعت زمین ناشی از زلزله

نوع مقاله : پژوهشی

نویسندگان

• علی درخشانی ¹
• علی صابری ²

¹ دانشگاه شاهد

² دانشگاه آزاد اسلامی واحد تهران مرکز

10.22067/civil.v32i1.62529

چکیده

در این پژوهش یک روش نوین موسوم به M5، برای به‌دست‌آوردن معادلات پیش‌بینی حرکات نیرومند زمین مورد‌استفاده قرار گرفت. بیشینه شتاب زمین و بیشینه سرعت زمین بااستفاده از بزرگی زمین‌لرزه، فاصلۀ منبع تا سایت، متوسط سرعت موج برشی و مکانیسم گسلش و نیز بهره‌گیری از پایگاه داده‌های گستردۀ پژوهشگاه مهندسی زمین‌لرزه (PEER) فرمول‌بندی شدند. برای اعتبارسنجی، مدل حاصل با مدل‌های شناخته‌شده مقایسه گردید. تحلیل حساسیت و آنالیز پارامتریک برای تعیین اهمیت پارامترهای مؤثر بر مدل و حساسیت آن به تغییرات پارامترها انجام شد. معادلات پیشنهادی بسیار آسان است و می‌توان آنها را با اطمینان برای اهداف پیش‌طراحی استفاده نمود.

کلیدواژه‌ها

• حرکات نیرومند زمین
• معادلات پیش‌بینی
• مدل درختی M5
• ارزیابی خطر لرزه‌ای

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عنوان مقاله [English]

Derivation of New Equations for Estimation of Earthquake Induced Peak Ground Acceleration and Velocity

نویسندگان [English]

• Ali Derakhshani ¹
• Ali Saberi ²

¹ Shahed University

² Islamic Azad University Central Tehran Branch

چکیده [English]

In this study, a new method called M5, was employed to derive ground-motion prediction equations (GMPEs). Peak ground acceleration (PGA) and peak ground velocity (PGV) was formulated by seismic parameters including earthquake magnitude, earthquake source to site distance, average shear-wave velocity and faulting mechanisms with The Pacific Earthquake Engineering Research Center (PEER) database. For verification, the proposed model was compared with three well-known models by Correlation Coefficient, Root Mean Square Error and Mean Absolute Error. A sensitivity analysis and a parametric analysis was carried out to determine the contributions of the parameters affecting model and sensitivity of the models to the variations of the influencing parameters. The equations are remarkably simple and can reliably be used for pre-design purposes.

کلیدواژه‌ها [English]

• Strong ground motion parameters
• Prediction equations
• M5 model tree
• Earthquake risk assessment

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