[1] [1] LARRARD F D, SEDRAN T. Optimization of ultra-high-performance concrete by the use of a packing model［J］. Cem Concr Res, 1994, 24(6): 997-1009.

[2] [2] RICHARD P, CHEYREZY M. Composition of reactive powder concretes［J］. Cem Concr Res, 1995, 25(7): 1501-1511.

[3] [3] RICHARD P, CHEYREZY M. Reactive powder concretes with high ductility and 200-800 MPa compressive strength［J］. ACI Spec Publ1994, 144(24): 507-518.

[12] [12] REINECK K H, FRETTLOHR B. Tests on scale effect of UHPFRC under bending and axial forces［J］. Constr Build Mater, 2016, 142(5): 781-790.

[13] [13] NGUYEN D L, REINECK K H, RYU G S. Size effect on flexural behavior of ultra-high-performance hybrid fiber-reinforced concrete［J］, ACI Mater J, 2013, 45(1): 1104-1116.

[14] [14] MALMUD G M, YANG Z, HASSAN A M. Experimental and numerical studies of size effects of ultra high performance steel fiber reinforced concrete beams［J］. Constr Build Mater, 2013, 48(19): 1027-1034.

[20] [20] BAZANT Z P. Size effect［J］. Int J Solids Struct, 2000, 37(1/2): 69-80.