contact information

Reza Hedayat, Ph.D.
Assistant Professor
Department of Civil & Environmental Engineering

Coolbaugh Hall Room 248

1012 14th Street

Golden, CO 80401, USA


Phone: (303) 273-3401

Refereed Journal Articles

​1. Masoumi, H., Roshan, H., Hedayat, A., Hagan, PC. (2018). Scale/Size dependency of intact rock under point load and indirect tensile (Brazilian) testing. International Journal of Geomechanics. DOI: 10.1061/(ASCE)GM.1943-5622.0001103.

2. Hedayat, A., Haeri, H., Hinton, J., Masoumi, H., and Spagnoli, G. (2018).Geophysical signatures of shear induced damage and frictional processes on rock joint. Journal of Geophysical Research. DOI: 10.1002/2017JB014773.

3. Haeri, H., Sarfarazi, V., Shemirani, A.B., Hedayat, A. (2017). Experimental and numerical investigation of the center-cracked horseshoe disk method for determining the mode I fracture toughness of rock-like material. Rock Mechanics and Rock Engineering. DOI: 10.1007/s00603-017-1310-3.

4. Shemirani, A., Haeri, H., Sarfarazi, V., and Hedayat, A. (2017). A review paper about experimental investigations on failure behavior of non-persistent joint. Geomechanics and Engineering. 13, 535-570.

5. Sarfarazi, V., Haeri, H., Shemirani, A., Hedayat, A., and Hosseini, S. (2017). Investigation of ratio of TBM disc spacing to penetration depth in rocks with different tensile strengths using PFC2D. Computers and Concrete, 20(4), 429-437.

6. Hedayat, A., and Walton, G. (2017). Laboratory determination of rock fracture shear stiffness using seismic wave propagation and digital image correlation. Geotechnical Testing Journal, 40(10), 92-106. DOI: 10.1520/GTJ20160035.

7. Walton, G., Hedayat, A., Kim, E., and Labrie, D. (2017). Post-yield strength and dilatancy evolution across the brittle-ductile transition in Indiana limestone. Rock Mechanics and Rock Engineering. DOI: 10.1007/s00603-017-1195-1.

8. Haeri, H., Sarfarazi, V., Hedayat, A., Tabaroei, A. (2016). Effect of tensile strength of rock on tensile fracture toughness using experimental test and PFC2D simulation. Journal of Mining Science, 52(4), 647-661.

9. Haeri, H., Sarfarazi, V., Hedayat, A. (2016). Suggesting a new testing device for determination of tensile strength of concrete. Structural Engineering and Mechanics, 60(6), 939-952. DOI: 10.12989/sem.2016.60.6.939.

10. Haeri, H., Hedayat, A., Zhu, Z. (2016). Numerical simulation of hydraulic fracturing in circular holes. Computers and Concrete, 18(6), 1135-1151. DOI:

11. Haeri, H., Sarfarazi, V., Marji, M.F., Hedayat, A., Zhu, Z. (2016). Experimental and Numerical Study of Shear Fracture in Brittle Materials with Interference of Initial Double Cracks. Acta Mechanica Solida Sinica, 29(5), 555-566.

12. Hedayat, A., Pyrak-Nolte, L and Bobet, A. (2014). Precursors to shear failure of rock discontinuities. Geophysical Research Letters, 41, 5467-5475, doi: 10.1002/2014GL060848.

13. Hedayat, A., Pyrak-Nolte, L and Bobet, A. (2014). Detection and quantification of slip along non-uniform frictional discontinuities using digital image correlation. Geotechnical Testing Journal, 37 (5), doi: 10.1520/GTJ20130141.

14. Hedayat, A., Pyrak-Nolte, L and Bobet, A. (2014). Multi-modal monitoring of slip along frictional discontinuities. Rock Mechanics and Rock Engineering, 47(5), 1575-1587, doi: 10.1007/s00603-014-0588-7.

15. Fahimifar, A., Monshizadeh, F., Hedayat, A., and Vakilzadeh, A. (2010). Analytical solution for the excavation of circular tunnels in a visco-elastic Burger’s material under hydrostatic stress field. Tunnelling and Underground Space Technology, 25(4), 297-304, doi: 10.1016/j.tust.2010.01.002.

16. Fahimifar, A. and Hedayat, A. (2010). Elasto-plastic analysis in conventional tunnelling excavation. Proceedings of the ICE- Geotechnical Engineering, 163(1), 37-45, doi: 10.1680/geng.2010.163.1.37.