Simulation of Temperature Effects on Concrete Residual Strength of the Slab-Column Connections

Authors

  • Wenchen Ma Department of Civil and Environmental Engineering and Construction, University of Nevada, USA

DOI:

https://doi.org/10.30564/frae.v2i4.1551

Abstract

Finite element simulations were conducted to explore the effects of high temperatures on the loading capacity of slab-column connection for the concrete flat-plate structures by the finite element analysis software ABAQUS. The structure used for the simulation is a slab which thickness is 150 mm with a 300 mm square column in the middle of slab, the column height is 450mm. The size of this slab is the same as experiments conducted by previous paper [1]. Based on the results of simulation, the punching capacity of this structure not experienced high temperature can be predicted with very good accuracy. But the result from simulations underestimated the loading capacity of the this structure after it has been cooled by around 10%. This phenomenon is a little bit conflicts with the known experimental results, however, it can be adjusted by modify the material parameters built-in the software. This article is focus on how to best simulate the concrete behavior for both linear and nonlinear part under the room temperature and cooling after experience a very high temperature.

Keywords:

Temperature effects, Residual strength of concrete, Non-linear behavior of concrete

References

[1] Chunyu Zhang, Wenchen Ma. (2019). "Effects of high temperature on residual punching strength of slab-column connections after cooling and enhanced post-punching load resistance." Engineering Structures 2019; 199(15)

[2] Ruiz, M. F., Muttoni, A., and Kunz, J. (2010). “Strengthening of flat slabs against punching shear using post-installed shear reinforcement.” ACI Structural Journal, 107(4), 434–442.

[3] Li, Y.-H. and Franssen, J.-M. (2011). “Test results and model for the residual compressive strength of concrete after a fire,” Journal of Structural Fire Engineering, 2(1), 29–44.

[4] ABAQUS Analysis user's manual 6.10-EF, Dassault Systems Simulia Corp., Providence, RI, USA; 2010.

[5] Wenchen Ma. (2016). “Simulate initiation and formation of cracks and potholes”

[6] George, S. J. and Tian, Y. (2012). “Structural performance of reinforced concrete flat plate buildings subjected to fire,” International Journal of Concrete Structures and Materials, 6(2), 111–121.

[7] ASCE. (1992). Structural fire protection. Manual No. 78. New York: ASCE Committee on Fire Protection, Structural Division, American Society of Civil Engineers.

[8] Joint ACI-TMS Committee 216 (2007). “Code requirements for determining fire resistance of concrete and masonry construction assemblies (ACI-TMS 216.1-07),” Farmington Hills, MI, 2007.

[9] Lubliner, J., Oliver, J., Oller, S., and Oñate, E. (1989). “A plastic-damage model for concrete.” International Journal of Solids and Structures, 25(3), 299-329.

[10] Lee, J., and Fenves, G.L. (1998). “Plastic-damage model for cyclic loading of concrete structures.” Journal of Engineering Mechanics, 124(8), 892-900.

[11] Genikomsou, A. S. and Polak, M. A. (2015). “Finite element analysis of punching shear of concrete slabs using damaged plasticity model in ABAQUS.” Engineering Structures, 98, 38-48.

[12] ACI (American Concrete Institute). Building code requirements for structural concrete and commentary. ACI 318-14, Farmington Hills, MI; 2014.

[13] Lee J., Xi, Y., and Willam, K. (2008). “Properties of Concrete after High-Temperature Heating and Cooling.” ACI Materials Journal, 105(4), 334-341.

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Issue

Vol. 2 , Iss. 4 (October 2019)

Article Type

Research Paper

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