Dynamic multiaxial strength and failure criterion of dam concrete

Dynamic multiaxial strength experiments on both dam and wet-screened concretes were carried out by using a large static and dynamic triaxial electro-hydraulic servo testing machine. The dynamic strength under uniaxial compression (C), uniaxial tension (T), biaxial compression–compression (C–C), biaxial compression–tension (C–T), triaxial compression–compression–tension (C–C–T) and triaxial compression–compression–compression (C–C–C) are presented in the paper. The influence of strain rate (ranging from 10−5/s to 10−2/s) and stress ratio on the failure modes and dynamic strength of dam and wet-screened concretes is analyzed. It is found that the failure modes of both dam and wet-screened concretes were mainly dependent on the stress ratio, but independent of the strain rate. The ultimate strengths of dam and wet-screened concretes are found to increase with the increase of strain rate. Particularly, the dynamic increasing factor (DIF) increases obviously when the tensile stress is included. It is noted that the maximum DIF existed in the triaxial C–C–T stress state and the minimum DIF corresponded to the triaxial C–C–C state. The octahedral normal and shear stresses are increased but the similar angle is kept constant with the increase of strain rate in the octahedral stress space. The dynamic failure criterion is developed after analyzing the effect of octahedral normal stress and similar angle on the dynamic strength.

[1]  K. Mori,et al.  Dynamic properties of concrete materials with high rates of tri-axial compressive loads , 2000 .

[2]  H. Shang,et al.  Experimental study of strength and deformation of plain concrete under biaxial compression after freezing and thawing cycles , 2006 .

[3]  Genda Chen,et al.  Dynamic Properties of Plain Concrete in Triaxial Stress State , 2009 .

[4]  Y. Malecot,et al.  Effect of coarse aggregate size and cement paste volume on concrete behavior under high triaxial compression loading , 2011 .

[5]  Sean D. Hinchberger,et al.  Simple Single-Surface Failure Criterion for Concrete , 2009 .

[6]  L. Javier Malvar,et al.  Review of Strain Rate Effects for Concrete in Tension , 1998 .

[7]  H.-L. Wang,et al.  Biaxial compression behaviour of different aggregate graded concrete , 2009 .

[8]  Dongming Yan,et al.  Dynamic properties of concrete in direct tension , 2006 .

[9]  M. Elices,et al.  Effect of aggregate size on the fracture and mechanical properties of a simple concrete , 2008 .

[10]  Vahid Lotfi,et al.  Comparison of non-orthogonal smeared crack and plasticity models for dynamic analysis of concrete arch dams , 2003 .

[11]  Cheng-Tzu Thomas Hsu,et al.  Stress-Strain Relations of High-Strength Concrete under Triaxial Compression , 2007 .

[12]  Shou-Yan Jiang,et al.  Failure analysis of a cracked concrete gravity dam under earthquake , 2013 .

[13]  Qingbin Li,et al.  Effect of Aggregate Type on Mechanical Behavior of Dam Concrete , 2004 .

[14]  I. Carol,et al.  Study of the Behavior of Concrete under Triaxial Compression , 2002 .

[15]  D. Watstein.  Effect of Straining Rate on the Compressive Strength and Elastic Properties of Concrete , 1953 .

[16]  Ali R. Khaloo,et al.  Size Influence of Specimens and Maximum Aggregate on Dam Concrete: Compressive Strength , 2009 .

[17]  Somsak Swaddiwudhipong,et al.  Failure Surface for Concrete under Multiaxial Load—a Unified Approach , 2005 .

[18]  H. L. Wang,et al.  Behavior of mass concrete under biaxial compression-tension and triaxial compression-compression-tension , 2009 .

[19]  Victor E. Saouma,et al.  Effect of Aggregate and Specimen Size on Fracture Properties of Dam Concrete , 1991 .

[20]  Anil K. Chopra,et al.  Dynamic Analysis of Arch Dams Including Hydrodynamic Effects , 1983 .

[21]  Guillermo Etse,et al.  Performance Dependent Failure Criterion for Normal- and High-Strength Concretes , 2009 .

[22]  Song Yu-pu,et al.  Dynamic biaxial tensile–compressive strength and failure criterion of plain concrete , 2013 .

[23]  H.-S. Shang,et al.  Performance of plain concrete under biaxial tension–compression after freeze–thaw cycles , 2010 .

[24]  Yu-pu Song,et al.  Triaxial strength and failure criterion of plain high-strength and high-performance concrete before and after high temperatures , 2010 .

[25]  S. H. Perry,et al.  Compressive behaviour of concrete at high strain rates , 1991 .

[26]  H. Shang.  Triaxial T-C-C behavior of air-entrained concrete after freeze-thaw cycles , 2013 .

[27]  Laurent Daudeville,et al.  Triaxial behaviour of concrete under high stresses : Influence of the loading path on compaction and limit states , 2008 .

[28]  Jikai Zhou,et al.  Influence of strain rate and water content on mechanical behavior of dam concrete , 2012 .