Investigating the Performance of Viscoelastic Dampers (VED) Under Nearfield Earthquakes with Directivity Feature

Open access

Abstract

One of the most important factors that make structures vulnerable to earthquakes is the short distance between structures and epicenter. Near-field earthquakes have special properties, such as increasing acceleration applied to the structure, which distinguishes them from far-field earthquakes. Therefore, the absorption of input energy for structures located near the faults is very important. Hence, by rotating the earthquake acceleration time history and comparing the resulting spectral acceleration response, the angle which applies the greatest force to the structure on the earthquake directivity side is obtained, and then the performance of a steel structure with viscoelastic dampers (VED) under near-field earthquakes with directivity feature is investigated. After analyzing the structure using nonlinear time history analysis, it was observed that the directivity phenomenon leads to significant increase in the force applied to the structure, but the viscoelastic dampers showed an acceptable performance in both states of with and without directivity.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] COX K. E. – ASHFORD S. A.: Characterization of large velocity pulses for laboratory testing. Pacific Earthquake Engineering Research Center 2002.

  • [2] WANG G. Q. – ZHOU X. Y. – ZHANG P. Z. – IGEL H.: Characteristics of amplitude and duration for near fault strong ground motion from the 1999 Chi-Chi Taiwan earthquake. Soil Dyn. Earthq. Eng Vol. 22 Iss. 1 2002 pp. 73 – 96.

  • [3] BERTERO V. V. – MAHIN S. A. – HERRERA R. A.: Aseismic design implications of near-fault san fernando earthquake records. Earthq. Eng. Struct. Dyn Vol. 6 Iss. 1 1978 pp. 31 – 42.

  • [4] CHOPRA A. K. – CHINTANAPAKDEE C.: Comparing response of SDF systems to near-fault and far-fault earthquake motions in the context of spectral regions. Earthq. Eng. Struct. Dyn Vol. 30 Iss. 12 2001 pp. 1769 – 1789.

  • [5] SOMERVILLE P. G. – SMITH N. F. – GRAVES R. W. – ABRAHAMSON N. A.: Modification of Empirical Strong Ground Motion Attenuation Relations to Include the Amplitude and Duration Effects of Rupture Directivity. Seismol. Res. Lett Vol. 68 Iss. 1 1997 pp.199 – 222.

  • [6] GHOBARAH A.: Response of Structures to Near-Fault Ground Motion. 13th World Conference on Earthquake Engineering Iss. 1031 2004.

  • [7] CHANG K. C. - LIN Y. Y. – LAI M. L.: Seismic Analysis and Design of Structures with Viscoelastic Dampers. ISET Journal of Earthquake Technology Vol. 35 Iss. 4 1998 pp. 143 -166.

  • [8] CHANG K. C. - SOONG T. T. - OH S. T. - LAI M. L.: Effect of Ambient Temperature on Viscoelastically Damped Structure. Journal of Structural Engineering ASCE Vol. 118 Iss. 7 1992 pp. 1955 - 1973.

  • [9] CHANG K. C. - SOONG T. T. - OH S. T. - LAI M. L.: Seismic Behavior of Steel Frame with Added Viscoelastic Dampers. Journal of Structural Engineering ASCE Vol. 121 Iss. 10 1995 pp. 1418 - 1426.

  • [10] Iranian code of practice for seismic resistant design of buildings standard (4th ed.) 2015 Tehran: BHRC.

  • [11] VATANSHENAS A.: Investigation of PTMD system affected by Parkfield near-field Earthquake. Journal of Modern Applied Science Vol. 11 Iss. 4 2017 pp. 70 - 79.

Search
Journal information
Metrics
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 2254 1840 426
PDF Downloads 2265 1920 208