Numerical Simulation of Aggregate Shapes of Two-Dimensional Concrete and Its Application1
Publication: Journal of Aerospace Engineering
Volume 20, Issue 3
Abstract
A practical method is presented for modeling of two-dimensional arbitrary shape aggregates. An efficient algorithm is developed for mass concrete whose aggregate content reaches 60–70%. All the same kind of random triangular fundamental aggregates are generated at one time, then the two-dimensional arbitrary shape aggregates are generated by the method of random extension. The presented algorithm is superior to common methods, in which all aggregates are generated one by one. This algorithm avoids the inefficiency and low aggregate content of other algorithms. Corresponding software 2D-RAS is developed on the basis of this algorithm. And by means of this software, behaviors of the three-grading concrete specimens under uniaxial tension and bending are studied. The effect of shape of aggregates on mechanical behaviors of concrete is preliminarily investigated. The results indicate that critical load capacity of specimens with random circular aggregate is greater than that of the specimen with arbitrary polygonal aggregate. The cracking depth of the specimen with random arbitrary shape aggregate is larger than that of the specimen with circular aggregate.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This study was supported by National Nature Scientific Fund of China (NNSFC50539030-1-1), and partly supported by the academic funds from Hohai University (Grant No. 02-01). The writers are grateful to Professor Chen Houqun for his beneficial advice.
References
Bazant, Z. P., and Tabbara, M. R. (1990). “Random particle model for fracture of aggregate or fiber composites.” J. Eng. Mech., 116(8), 1686–1705.
Beddow, J. K., and Meloy, T. (1980). Testing and characterization of powders and fine particles, Heyden, London.
Fu, G., and Dekelbab, W. (2003). “3-D random packing of polydisperse particles and concrete aggregate grading.” Powder Technol., 133, 147–155.
Gao, Z. G., and Liu, G. T. (2003). “Two-dimensional random aggregate structure for concrete.” J. of Tsinghua Univ. (Sci&Tech), 43(5), 710–714 (in Chinese).
Liu, W. Y., Ye, W. Y., and Ge, H. (1986). “Experimental study on mechanical properties of fully grading aggregate concrete in DongJiang arch dam.” Water Power, 5, 8–14 (in Chinese).
Schlangen, E., and Garbocai, E. J. (1997). “Fracture simulations of concrete using lattice model: Computional aspect.” Eng. Fract. Mech., 57(2/3), 319–322.
Schlangen, E., and Van Mier, J. G. M. (1992). “Simple lattice model for numerical simulation of fracture of concrete materials and structures.” Mater. Struct., 25, 534–542.
Stankowski, T., Runesson, K., and Sture, S. (1993). “Fracture and slip of interfaces in cementitious composites. I: Characteristics.” J. Eng. Mech., 119(2), 292–314.
Tang, C. A., and Zhu, W. C. (2003). Concrete damage and crack-numerical experiments, Science Press (in Chinese).
Van Mier, J. G. M. (1997). Fracture processes of concrete: Assessment of material parameters for fracture model, CRC Press, Boca Raton, Fla.
Wang, Z. M., Kwan, A. K. H., and Chan, H. C. (1999). “Mesoscopic study of concrete. I: Generation of random aggregate structure and finite element mesh.” Comput. Struct., 70, 533–544.
Wittmann, F. H., Roelfdtra, P. E., and Sadouki, H. (1984). “Simulation and analysis of composite structures.” Mater. Sci. Eng., 68, 239–248.
Yang, Q., Zhang, H., and Zhou, W. Y. (2002). “Lattice model for simulation failure process of rock.” J. Hydraul. Eng., 4, 46–50 (in Chinese).
Zaitsev, Y. B., and Wittmann, F. H. (1981). “Simulation of crack propagation and failure of concrete.” Mter. & Constr., 14, 357–365.
Zhang, D. H., Xing, J. B., and Zhu, F. S. (2004). “Study of failure process in concrete samples by using numerical simulation.” J. of Northeastern University, 25(2), 175–178 (in Chinese).
Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 20 • Issue 3 • July 2007
Pages: 172 - 178
Copyright
© 2007 ASCE.
History
Received: Nov 21, 2005
Accepted: Dec 8, 2006
Published online: Jul 1, 2007
Published in print: Jul 2007
Notes
Presented at the ASCE Proceedings of Earth & Space 2006, Houston, March 5–8, 2006.
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.