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Modified Similitude Law for Pseudodynamic Test on Small-scale Steel Models

철골 축소모헝의 유사동적실험을 위한 수정된 상사법칙

  • Kim, Nam-Sik (Technology Research Center of Hyundai Engineering and Construction) ;
  • Kwak, Young-Hak (Yooshin Engineering Corporation ) ;
  • Chang, Sung-Pil (Dept.of Earth Environment System Engineering, Seoul National University)
  • Published : 2003.12.01

Abstract

Although there are several experimental techniques to evaluate the seismic behavior and performance of civil structures, small-scale models in mast of physical tests, instead of prototypes or large-scale models, would be used due to a limitation on capacities of testing equipments. However, the inelastic seismic response prediction of small-scale models has some discrepancies inherently because the similitude law is generally derived in the elastic range. Thus, a special attention is required to regard the seismic behavior of small-scale models as one of prototypes. In this paper, differences between prototypes and small-scale models pseudodynamically tested on steel column specimens are investigated and an alternative to minimize them is suggested. In general, small-scale models could have the distorted stiffness induced from some experimental errors on test setup, steel fabrication and so on. Therefore, a modified similitude law considering both a scale factor for length and a stiffness ratio of small-scale model to prototype is proposed. Using the modified similitude law to compensate experimental errors, the pseudodynamic test results from modified small-scale model are much improved as compared with the results of prototype. According to the pseudodynamic test results of small-scale steel models, it can be concluded that the modified similitude law proposed could be effective in simulating the seismic response of prototype structures.

References

  1. Meng, Q. L., “The dynamic simulation of nonlinear performance of R/C structures in the earthquake simulation shaking table test,” Master dissertation of Institute of Engineering Mechanics, China Seismological Bureau, Harbin, 2001.
  2. Annual book of ASTM standards, Section 1, Vol. 01.04, ASTM, 1992.
  3. Kim, N. S. and Lee, D. G., “Pseudodynamic test for evaluation of seismic performance of base-isolated liquid storage tanks,” International Journal of Engineering Structures, Vol. 17, No. 3, 1995, pp. 198-208. https://doi.org/10.1016/0141-0296(95)00076-J
  4. Harris, H. G. and Sabnis, G. M., Structural modeling and experimental techniques, CRC Press, New York, 1999.
  5. Zhang, M. Z., “Study on similitude laws for shaking table tests,” Chinese Earthquake Engineering and Engineering Vibration, Vol. 17, No. 2, 1997(in Chinese).
  6. Zhang, M. Z., Guo, X. and Dai, J. W., “Shaking table tests of a high-rise building model,” Proc. of the Fifth International Conference on Tall Buildings, Hong Kong, 1998.
  7. Zung, Z. M., Chang, S. P., and In, S. B., “The seismic performance for concrete-filled steel piers,” Proceedings of Earthquake Engineering of Korea, Vol. 6, No. 2, 2002. 9, pp. 189-196(in Korean).
  8. Korean Standard Handbook, Steel(I), KSA, 2001.
  9. Usami, T. and Kumar, S., “Damage evaluation in steel box columns by pseudodynamic tests,” Journal of Structural Engineering, ASCE, Vol. 122, No. 6, 1996, pp. 635-642. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:6(635)
  10. Richards, C. W., “Size effect in the tension test of mild steel beams,” Proc. of ASTM, Vol. 54, 1954, pp. 995-1002.
  11. Kim, W., El-Attar, A., and White, R. N., “Small-scale modeling techniques for reinforced concrete structures subjected to seismic loads,” Technical report NCEER-88-0041, State University of New York at Buffalo, New York, 1988.
  12. Lu, Y., Vintzileou, E., Zhang, G. F., and Tassios, T. P., “Reinforced concrete scaled columns under cyclic actions,” Soil Dynamics and Earthquake Engineering, Vol. 18, 1999, pp. 151-167. https://doi.org/10.1016/S0267-7261(98)00037-2
  13. Chung, W. J., Yun, C. B., Kim, N. S., and Seo, J. W., “Shaking table and pseudodynamic tests for the evaluation of the seismic performance of base-isolated structures,” International Journal of Engineering Structures, Vol. 21, 1999, pp. 365-379. https://doi.org/10.1016/S0141-0296(97)00211-3
  14. Mahin, S. A. and Shing, P. B., “Pseudodynamic test method-current status and future directions,” Journal of Structural Engineering, ASCE, Vol. 115, No. 8, 1989, pp. 2113-2128. https://doi.org/10.1061/(ASCE)0733-9445(1989)115:8(2113)
  15. Kumar, S., Itoh, Y., Saizuka, K. and Usami, T., “Pseudodynamic testing of scaled models,” Journal of Structural Engineering, ASCE, Vol. 123, No. 4, 1997, pp. 524-526. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:4(524)

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