Three-Dimensional Numerical Model for Seismic Analysis of Structures

• DOI: 10.13189/cea.2020.080306
• Publication Date: 2020-06-11T02:58:55Z
• Authors: Reza Latifi; Rahimeh Rouhi
• Keywords: 02 engineering and technology; 0201 civil engineering

Response Spectrum Analysis (RSA) and modal combination techniques are widely used to estimate the peak response of structures subjected earthquake vibrations.This paper presents numerical modeling seismic analysis structures.The spectra based on Eurocode 8 is implemented for a five storey moment-resisting 3D structure earthquake-induced vibration.Eigenvector carried out determine undamped free vibration mode shapes frequencies.The lumped mass matrix, stiffness matrix full derived natural periods, shapes, participation factors, effective ratios calculated.The structural in different modes combined total dynamic response.The Square Root Sum Squares (SRSS), Complete Quadratic Combination (CQC), Absolute (AbsSum) rules discussed compared.The results SRSS CQC rule examined building almost identical as all cross-correlation coefficients approximately equal zero, responses individual completely uncorrelated.CQC appropriate when frequencies close each other.AbsSum method shows an upper bound since it assumes that peaks occur at same time.The simulation spectrum MATLAB® software.