- Volume 20 Issue 4
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Evaluation on Expectation of Deflection of Floor Damping Materials Subjected to Long-Term Load
장기하중을 받는 바닥완충재의 처짐 예측 평가
- Received : 2015.10.21
- Accepted : 2016.05.23
- Published : 2016.07.01
Floor damping materials used in floating floor system to diminish the floor noise have been made with low density and dynamic stiffness. Owing to this low density and dynamic stiffness, the deflection in these materials under long-term loading and cracking of the floor finishing mortar in the floating floor system may occur. This paper presents the results of long-term loading effects on the deflection of different types of floor damping materials. The experimental program involved the long-term loading tests for 490 days loading period on sixteen specimens. Specimens were classified as DM1(Damping Materials) to DM8, depending upon the four main parameters; types, bottom shapes and densities of floor damping materials and amount of loading. Results indicated that the long-term deflection of all specimens of damping materials remained unchanged after 200 days at all loading amounts, except the specimens made up of Polystrene, in which long-term deflection remained unchanged after 160 days at 250 N load and 100 days 500 N load. In this paper, two types of correlation expressions were shown in the deflection range prior to the range where deflection remained constant; two analyses by ISO 20392 and linear regression. In comparison of two analyses and experimental results on the difference of deflection of 16 specimens, the difference of deflection was below 0.4 mm in those analyses in case of that total deflection was below 10 mm. Restrictively, it was judged that the analysis for the deflection of specimens made up of Polystrene is more appropriate using ISO 20392.
Floating floor system;Floor damping materials;Long-term deflection;Floor noise;ISO20392
- ISO 20392 (2007), Thermal-insulating materials - Determination of Compressive Creep, International Standards.
- Kim, J. M., and Lee, J. Y. (2014), Evaluation of Long-term Deflection and Dynamic Elastic Modulus of Floor Damping Materials Used in Apartment Buildings, Journal of the Architectural Institute of Korea, 30(11), 29-36.
- Kim, K. W., Yeon, J. O., and Yang, K. S. (2012), Correspondence Research of Long-term Compressive Creep of Resilient Materials and ISO 20392, Journal of the Korean Society for Noise and Vibration Engineering, 22(12), 1250-1256. https://doi.org/10.5050/KSNVE.2012.22.12.1250
- KS F 2868 (2013), Determination of Dynamic Stiffness of Materials used Under Floating Floors in Dwellings, Korean Industrial Standards.
- KS F 2873 (2011), Measuring Method of Compressibility of Resilient Materials for Floor Impact Sound, Korean Industrial Standards.
- Lee, J. Y., Lee, B. S., Jun, M. H., and Kim, J. M. (2015), Evaluation of Cracking Strength of Floating Floor System, Journal of the Korea Institute for Structural Maintenance and Inspection, 19(1), 53-61. https://doi.org/10.11112/jksmi.2015.19.1.053
- Findley, W. N. (1944), Creep Characteristics of Plastics, Symposium on Plastics, American Society of Testing and Materials.
- Housing and Urban Research Institute (HURI) (2005), A Study on the Development of the Structural Analysis Method for Floor Heating System with Insulation, Technical Report, Seoul, Repulblic of Korea, 134.
Supported by : 한국건설교통기술평가원