Impact on the Strength of Newly-Placed Concrete-Filled Tube under Earthquake Excitation

Abstract:

The Chi-Chi earthquake caused significant loss of property and life. This phenomenon disclosed many design-related in the construction industry. The first condition that we would like to determine is whether the earthquake affected the final strength of newly-cast concrete if the fresh concrete was cast just before the earthquake struck, particularly when the fresh concrete was cast just before its initial or final setting. This study aims to investigate the effects of an earthquake on fresh concrete. Twenty specimens were fabricated to investigate the effects of strong ground motion on concrete. Of the 20 specimens, 9 were lightweight-concrete-filled CFT (Concrete Filled Tube) columns, 9 were CFT columns filled with concrete of normal weight, and the remaining two were pure steel hollow tubes. The specimens were leveled on a shaking table to simulate the strong ground motion caused by an earthquake. The test reveals that the lightweight-concrete-filled CFT columns are unaffected by the quake. However, the normal weight concrete filled CFT columns are slightly affected by the quake.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 1345-1350
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.1345
• Online since: January 2013
• Authors: Jui Ling Liu, Dung M. Lue, Ping T. Chung
• Keywords: CFT Column, Concrete, Earthquake, Lightweight Concrete

References

[1] AISC: Design Specification for Structural Steel Buildings (American Institute of Steel Construction, Inc., Chicago, Illinois, 1999, 2005).

[2] AIJ: Structural Calculation of Steel Reinforced Concrete Structures (Architectural Institute of Tokyo, Japan, 1994).

[3] ACI 318-05: Building Code Requirements for Structural Concrete (American Concrete Institute, Detroit, MI, 2005).

[4] T. Yen, H.J. Chen: Light-weight Concrete (The Lightweight Aggregate Association, Taiwan, 2006).

[5] T. Yen: Effect on Structure and Strength of Newly-placed Reinforced Concrete (Conference on the Impact of the Chi-Chi Earthquake to Civil Engineering Facilities, Taiwan, 1999).

[6] ASTM C-403: Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance, ASTM, PA, 1995).

[7] S. Mindess, and J.F. Young: Concrete (Prentice-Hall, Inc. Englewood Cliffs, N. J., pp.381-385 & pp.344-351, 1981).

[8] Y.Q. Lin, J.Q. Zheng: Nondestructive Examining on Holding Power of Concrete and Steel Reinforcement (Conference on the Impact of the Chi-Chi Earthquake to Civil Engineering Facilities, 1999).

[9] J.Y. Yan: Spot Experiment on Effect of Earthquake on Bond Force of Newly-placed Concrete (Seminar on the Impact of the Chichi Earthquake to Civil Engineering Facilities, 1999).

[10] T. Yan: Shaking Tamping of Concrete (Conference on Engineering Technology of Concrete, Construction Center of Taiwan, Financial Group Legal Person, 1985).

[11] T. Yan, J.H. Su: (Earthquake's Effect on Mechanical Properties of Newly-placed Reinforced Concrete, Doctoral Dissertation, Civil Engineering Institution, National Chung Hsing University, Taiwan, 2004).