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

Open access


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.

[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.

Civil and Environmental Engineering

Stavebné a environmentálne inžinierstvo

Journal Information


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 977 977 188
PDF Downloads 1027 1027 206