Author : Durgesh Singh Rathore 1
Date of Publication :14th May 2018
Abstract: The performance of different structural responses against different earthquake ground motion conditions in a G+11 multistorey building is presented in this paper by time history analysis method. The building model is investigated under different ground motions such as Fault normal component and Fault parallel component of the ground motion by dynamic time history analysis method and the analysis is done in the ETAB software. Time histories from different fault types and earthquake magnitudes recorded at various distances from the causative fault are compared and their special features are discussed The time history of the Uttarkashi earthquake has been applied on the model and Acceleration, Velocity and displacement curves have been drawn for both Fault Normal and Fault Parallel component for Far Fault region and Near Fault region ground motion. The values of acceleration, velocity, displacement have been found in every 0.005 seconds, also the values of Peak Ground Acceleration, Peak Ground Velocity and Peak Ground Displacement has been determined for both components taking the data of two sub stations of Uttarkashi earthquake. A comprehensive review and study of the factors that influence the near-fault ground motions is attempted. The variation and interrelation of the kinematic and dynamic parameters pertaining to the rupture process are examined. The study mainly focuses on the parameters such as displacement variation and response spectrum variation of the near field region and far field region .The subsequent comparision is also done for both the component condition (normal and parallel) for both the regions.The values of PGA, PGV, PGD obtained for fault normal component are higher than the values obtained for the fault parallel component of the ground motion,. Discussion regarding the implications of near-source ground motions on the engineering design of long-period structures is presented in an effort to gain insight regarding those features of near-field ground motions that control the dynamic response of such structures The response spectrum curves are different for each kind of earthquake ground motions, hence it means that the structure have different responses to each kind of earthquake ground motions
- Archuleta, R. J. and S. H. Hartzell, 1981. Effects of fault finiteness on near-source ground motion. Bull. Seismol. Soc. Am., 71: 939-957
- Alavi, B. and Krawinkler, H. (2000). "Consideration of near-fault ground motion effects in seismic design." Proceedings, 12th World Conference on Earthquake Engineering, Auckland, New Zealand, Paper No. 2665
- Mario Paz,1979, “Structural Dynamics” 2nd Edition, CBS Publishers and Distributors
- Bray, J.D., and Rodriguez-Marek, A., (2004) “Characterization of forward-directivity ground motions in the near-fault region.” Soil Dynamics and Earthquake Engineering, 24, 815-828.
- Applied Technology Council (ATC), Seismic Evaluation and Retrofit of Concrete Buildings. ATC-40, Redwood City, CA, 1996.