DOI QR코드

DOI QR Code

Impact of target spectra variance of selected ground motions on seismic response of structures

  • Xu, Liuyun (Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University) ;
  • Zhou, Zhiguang (Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University)
  • 투고 : 2020.08.03
  • 심사 : 2022.07.24
  • 발행 : 2022.08.25

초록

One common method to select input ground motions to predict dynamic behavior of structures subjected to seismic excitation requires spectral acceleration (Sa) match target mean response spectrum. However, dispersion of ground motions, which explicitly affects the structural response, is rarely discussed in this method. Generally, selecting ground motions matching target mean and variance has been utilized as an appropriate method to predict reliable seismic response. The goal of this paper is to investigate the impact of target spectra variance of ground motions on structural seismic response. Two sets of ground motions with different target variances (zero variance and minimum variance larger than inherent variance of the target spectrum) are selected as input to two different structures. Structural responses at different heights are compared, in terms of peak, mean and dispersion. Results show that increase of target spectra variance tends to increase peak floor acceleration, peak deformation and dispersions of response of interest remarkably. To short-period structures, dispersion increase ratios of seismic response are close to that of Sa of input ground motions at the first period. To long-period structures, dispersions of floor acceleration and floor response spectra increase more significantly at the bottom, while dispersion increase ratios of IDR and deformation are close to that of Sa of input ground motions at the first period. This study could further provide useful information on selecting appropriate ground motion to predict seismic behavior of different types of structures.

키워드

과제정보

Financial support from National Key Research and Development Program of China (2020YFB1901402) and National Natural Science Foundation of China under Grant 51778491 are highly appreciated.

참고문헌

  1. Baker, J.W. and Cornell, C.A. (2006), "Spectral shape, epsilon and record selection", Earth. Eng. Struct. Dyn., 35(9), 1077-1095. https://doi.org/10.1002/eqe.571.
  2. Baker, J.W. (2008), "Conditional mean spectrum: tool for groundmotion selection". J. Struct. Eng., 137(3), 322-331. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000215.
  3. Baker, J.W. and Lee, C. (2018), "An improved algorithm for selecting ground motions to match a conditional spectrum", J. Earthq. Eng., 22(4), 708-723. https://doi.org/10.1080/13632469.2016.1264334.
  4. Bayati, Z. and Soltani, M. (2016) "Ground motion selection and scaling for seismic design of RC frames against collapse," Earthq. Struct., 11(3), 445-459. https://doi.org/10.12989/EAS.2016.11.3.445.
  5. Butatti, N., Stafford, P.J. and Bommer, J.J. (2011), "Earthquake accelerogram selection and scaling procedures for estimating the distribution of drift response". J. Earthq. Eng., 137(3), 345-357. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000217.
  6. Davalos, H. and Miranda, E. (2019), "Evaluation of bias on the probability of collapse from amplitude scaling using spectralshape-matched records", Earth. Eng. Struct. Dyn., 48(8), 970- 986. https://doi.org /10.1002/eqe.3172.
  7. Ergun, M. and Ates, S. (2014) "Comparing of the effects of scaled and real earthquake records on structural response", Earthq. Struct., 6(4), 375-392. https://doi.org/10.12989/eas.2014.6.4.375.
  8. Ganjavi, B., Hadinejad, A. and Jafarieh, A.H. (2019), "Evaluation of ground motion scaling methods on drift demands of energybased plastic designed steel frames under near-fault pulse-type earthquakes", Steel Compos Struct., 32(1), 91-110. https://doi.org/10.12989/SCS.2019.32.1.091.
  9. Genc,A. F., Ergun, M., Gunaydin, M., Altunisik, A.C., Ates, S., Okur, F.Y., and Mosallam, A.S. (2019),"Dynamic analyses of experimentally-updated FE model of historical masonry clock towers using site-specific seismic characteristics and scaling parameters according to the 2018 Turkey building earthquake code", Eng. Fail Anal, 105, 402-426. https://doi.org/10.1016/j.engfailanal.2019.06.054.
  10. GB50011-2010 (2016), Chinese Code for Seismic design for buildings, Chinese Housing and Urban-Rural Development Insitute; Beijing, China.
  11. Ha, S.J. and Han S.W. (2016), "A method for selecting ground motions that considers target response spectrum mean and variance as well as correlation structure". J. Earthq. Eng., 20(8), 1263-1277. https://doi.org/10.1080/13632469.2016.1138162.
  12. Jayaram, N. and Baker, J. (2010), "Ground-motion selection for peer transportation research program, Joint conference proceedings", 7th International Conference on Urban Earthquake Engineering (7CUEE) and 5th International Conference on Earthquake Engineering (5ICEE), Tokyo, Japan, March.
  13. Jayaram, N., Lin, T., Baker, J.W. (2011), "A computationally efficient ground-motion selection algorithm for matching a target response spectrum mean and variance", Earthq. Spectra, 27(3), 797-815. http://dx.doi.org/10.1193/1.3608002.
  14. Jiang, H.J., He, L.S., Lu, X.L., Ding, JM. and Zhao, X. (2011), "Analysis of seismic performance and shaking table tests of the Shanghai Tower", J. Build. Struct., 32(11), 55-63. http://dx.doi.org/1000-6869(2011)11-0055-09. 1000-6869(2011)11-0055-09
  15. Katsanos, E.I. and Sextos, A.G. (2017), "Structure-specific selection of earthquake ground motions for the reliable design and assessment of structures", B. Earth. Eng., 16(2), 583-611. https://doi.org /10.1007/s10518-017-0226-3.
  16. Koopaee, M.E., Dhakal, R.P. and MacRae, G. (2017), "Effect of ground motion selection methods on seismic collapse fragility of RC frame buildings". Earth. Eng. Struct. Dyn., 46(11), 1875-1892. https://doi.org/10.1002/eqe.2891.
  17. Kwong, N.S. and Chopra, A.K. (2015), "Evaluation of the exact conditional spectrum and generalized conditional intensity measure methods for ground motion selection". Earth. Eng. Struct. Dyn., 45(5), 757-777. https://doi.org/10.1002/eqe.2683.
  18. Liang, X. and Mosalam, K.M. (2020), "Ground motion selection and modification evaluation for highway bridges subjected to Bi-directional horizontal excitation", Soil. Dyn. Earthq. Eng., 130, 1-12. https://doi.org/10.1016/j.soildyn.2019.105994.
  19. Lin, T., Haselton, C.B. and Baker, J.W. (2013), "Conditional spectrum-based ground motion selection. Part I: Hazard consistency for risk-based assessments", Earth. Eng. Struct. Dyn., 42(12), 1847-1865. https://doi.org/10.1002/eqe.2301.
  20. Liu, Y., Kuang, J.S. and Yuen, T.Y.P. (2019), "Modal-based ground motion selection procedure for nonlinear response time history analysis of high-rise buildings", Earth. Eng. Struct. Dyn., 49, 95-110. https://doi.org/10.1002/eqe.3232.
  21. Lu, X.L. (2009), Seismic Design Guidelines of Out-Of-Codes High Rise Buildings, (2nd Edition), Tongji University Press, Shanghai, China.
  22. Lu, X.Z., Xie, L.L., Guan, H., Huang, Y.L. and Lu, X. (2015), "A shear wall element for nonlinear seismic analysis of super-tall buildings using OpenSees", Finite. Elem. Anal. Des., 98, 14-25. https://doi.org/10.1016/j.finel.2015.01.006.
  23. NEHRP Consultants Joint Venture (2011), "Selecting and scaling earthquake ground motions for performing response-history analysis", GCR 11-917-15; National Institute of Standards and Technology.
  24. PEER Ground Motion Selection and Modification Working Group (2009), Evaluation of Ground Motion Selection and Modification Methods: Predicting Median Interstory Drift Response of Buildings, Pacific Earthquake Engineering Research Center, University of California, Berkeley, USA.
  25. Pejovic, J.R., Serdar, N.N. and Pejovic, R.R. (2017), "Optimal intensity measures for probabilistic seismic demand models of RC high-rise buildings", Earthq. Struct., 13(3), 221-230. http://doi.org/ 10.12989/EAS.2017.13.3.221.
  26. Pejovic, JR., Serdar, N.N. and Pejovic, R.R. (2018), "Novel optimal intensity measures for probabilistic seismic analysis of RC high-rise buildings with core", Earthq. Struct., 15(4), 443-452. http://doi.org/10.12989/EAS.2018.15.4.443.
  27. Schellenberg, A., Baker, J., Mahin, S. and Sitar, N. (2014), Investigation of Seismic Isolation Technology Applied to the APR 1400 Nuclear Power Plant, Volume 2: Selection of Ground Motions, Pacific Earthquake Engineering Research Center, Headquarters at the University of California, Berkeley, USA.
  28. Tsai, M.H., Zhang, J., Song, Y.P., and Lu, J.K. (2018), "Dynamic performance of a composite building structure under seismic ground motions", Earthq. Struct., 15(2), 179-191. https://doi.org /10.12989/EAS.2018.15.2.179.
  29. Uribe, R., Satter S., Speicher, M.S. and Ibarra, L. (2019), "Effect of common U.S. ground motion selection methods on the structural response of steel moment frame buildings". Earthq. Spectra, 35(4), 1611-1635. https://doi.org/0.1193/122917EQS268M. https://doi.org/10.1193/122917EQS268M
  30. Xu, L. and Zhou, Z.G. (2022), "Weighted Average Conditional Mean Spectrum (WACMS): A bridge between common CMS and Uniform Hazard Spectrum (UHS)". Soil Dyn. Earthq. Eng., 156, 107238. https://doi.org/10.1016/j.soildyn.2022.107238.
  31. Zhou, Z. G., Wei, X. D., Lu, Z. and Jeremic, B. (2018), "Influence of soil-structure interaction on performance of a super tall building using a new eddy-current tuned mass damper", Struct. Des. Tall. Spec., 27(14), 1-16. https://doi.org/10.1002/tal.1501.