Abstract
This study is presented to achieve three objectives: (1) to compare between the inelastic responses of buildings under near and far fault excitations, (2) to investigate the effect of the pulse to structural period ratio, and (3) to evaluate a set of intensity measurements (IMs) in terms of near fault (NF) earthquakes. A real reinforced concrete building with 35 storeys is analysed in the scope of the first and second objectives, whereas the third objective involves three general-frame buildings consisting of 6, 13, and 20 storeys. Results show that the NF excitation can drive the building to exceed its life safety performance level. Furthermore, the accuracy of the IM highly depends on the vibration period of the building and the function used to calculate the IM.
Highlights
Earthquakes occurring near the fault rupture have specific characteristics that distinguish them from ordinary ground motions recorded far from the source of rupture
This study highlights an important scope in the seismic structural engineering field, that is, the special properties of near fault (NF) earthquakes and their effects on the inelastic response of multistorey RC buildings
A large number of NF earthquakes have been used to cover a wide range of ground motion characteristics
Summary
Earthquakes occurring near the fault rupture have specific characteristics that distinguish them from ordinary ground motions recorded far from the source of rupture. Kourosh Talebi Jouneghani et al [6] reviewed behaviour of a 2D model of a six-storey frame building under pulse-like motions They indicated that the displacement due to NF excitation exceeded design requirements by 30 %. Mohsen Gerami and Davood Abdollahzadeh [8] studied the effect of the near fault ground motion on the element and structure demand and capacity They analysed 5 steel moment resistance frames under 20 near fault and far fault excitations by using nonlinear time history analysis. They found that the motions with long duration pulse magnified the axial force and flexural moment of the column and reduced the flexural strength and ductility capacity. A statistical analysis is performed to assess a set of intensity measurements and evaluate their efficiency in measuring the severity of NF earthquakes
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