چکیده مقاله
Accurate assessment of structural seismic response depends critically on the representation of input ground motions in nonlinear time history analysis NLTHA Because recorded accelerograms rarely match target design spectra derived from codes or probabilistic seismic hazard analysis PSHA , engineers apply scaling methods to ensure compatibility This review synthesizes current knowledge on accelerogram scaling approaches and their impact on structural response, drawing upon an Iranian master’s thesis and recent international literature The study identifies four main categories of scaling: time domain amplitude scaling, frequency domain scaling including spectral matching , code based procedures, and hybrid or adaptive methods Comparative evaluations reveal that amplitude scaling, while simple, introduces systematic bias, particularly for long period and near fault structures Spectral matching improves spectral compatibility but may artificially distort phase and duration Energy based scaling, such as Arias intensity adjustment, preserves cumulative demands and reduces dispersion in nonlinear parameters but does not always align with code based target spectra Code based scaling procedures, though practical and conservative, risk inefficiency due to overdesign The structural consequences of scaling choices are far reaching They affect global responses such as base shear and drift ratios, higher mode demands such as floor accelerations, cumulative effects such as residual drift, and probabilistic assessments such as fragility curves The thesis and broader research converge on the conclusion that no single method is universally optimal Instead, scaling decisions must be context dependent, tailored to structural type, hazard scenario, and performance objectives
کلیدواژهها
نویسندگان
Farzad Farokhzad
Assistant Professor, Department of Civil Engineering, Mazandaran Institute of Technology
Reza Sadabadi
Master of Science in Civil Engineering, Structural Engineering, Islamic Azad University, Safadasht Branch, Tehran, Iran
Jamal Gorji
Lecturer, Department of Civil Engineering, Mazandaran Institute of Technology
Behzad Esfandiari Tabari
MSc Student, Mazandaran Institute of Technology, Babol, Iran
شیوه ارجاع
Sadabadi, Reza,1404,Assessment Of Different Earthquakes Accelerometers Scaling Approaches And Their Impact On Structural Seismic Response,19th International Conference on Mechanical, Construction Industrial & Civil Engineering,Tehran
ارائهشده در
مجموعه مقالات نوزدهمین کنفرانس بین المللی مکانیک، ساخت، صنایع و مهندسی عمران26 مهر 1404 · تهران