1. Agbabian, N. S., Higazy, E. M., Abdel-Jafar, A. N., and Elnashai, A. S. (1994). “Experimental observations on the seismic shear performance of R/C beam-column connections subjective to varying axial column force.” Earthquake engineering and Structural Dynamics, pp. 859–876, DOI: 10.1002/eqe.4290230804.
2. Anderson, J. C. and Bertero, V. V. (1973). “Effects of gravity loads and vertical ground acceleration on the seismic response of multi-story frame.” 5th WCEE, Rome, Proceeding, pp. 2914–2923.
3. Bozorgnia, Y., Mahin, S. A., and Brady, G. (1998). “Vertical response of twelve structures recorded during the northridge earthquake.” Earthquake Spectra, Vol. 14, No. 3, pp. 411–432, DOI: 10.1193/ 1.1586008.
4. Bozorgnia, Y., Niazi, M., and Campbell, K. W. (1995). “Characteristics of free-field vertical ground motion during the northridge earthquake.” Earthquake Spectra, Vol. 11, No. 4, pp. 515–525, DOI: 10.1193/ 1.1585825.
5. Building and Housing Research Center (BHRC) (2005). Iranian code of practice for seismic re-sistant design of buildings, Standard No. 2800-05, 3rd edition, Building and Housing Re-search Center, Tehran, Iran.