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Design Validation through Analysis of Concrete Modular Road Behavior under Static Axial Loads
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 Title & Authors
Design Validation through Analysis of Concrete Modular Road Behavior under Static Axial Loads
Nam, Jeong-Hee; Kim, Woo Seok; Kim, Ki Hyun; Kim, Yeon Bok;
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PURPOSES : The purpose of this study is to validate the design criteria of the concrete modular road system, which is a new semi-bridge-type concept road, through a comparison of numerical analysis results and actual loading test results under static axial loads. METHODS : To design the semi-bridge-type modular road, both the bridge design code and the concrete structural design code were adopted. The standard truck load (KL-510) was applied as the major traffic vehicle for the design loading condition. The dimension of the modular slab was designed in consideration of self-weight, axial load, environmental load, and combined loads, with ultimate limit state coefficients. The ANSYS APDL (2010) program was used for case studies of center and edge loading, and the analysis results were compared with the actual mock-up test results. RESULTS : A full-scale mock-up test was successfully conducted. The maximum longitudinal steel strains were measured as about 35 and 83.5 micro-strain (within elastic range) at center and edge loading locations, respectively, under a 100 kN dual-wheel loading condition by accelerating pavement tester. CONCLUSIONS : Based on the results of the comparison between the numerical analysis and the full-scale test, the maximum converted stress range at the edge location is 32~51% of the required standard flexural strength under the two times over-weight loading condition. In the case of edge loading, the maximum converted stresses from the Westergaard equation, the ANSYS APDL analysis, and the mock-up test are 1.95, 1.7, and 2.3 times of that of the center loading case, respectively. The primary reason for this difference is related to the assumption of the boundary conditions of the vertical connection between the slab module and the crossbeam module. Even though more research is required to fully define the boundary conditions, the proposed design criteria for the concrete modular road finally seems to be reasonable.
concrete modular road;semi-bridge type;self compacting concrete;precast concrete slab;edge loading;
 Cited by
AASHTO LRFD (2012), AASHTO LRFD Bridge Design Specifications Customary U.S. Units, AASHTO, 2012.

ANSYS Inc. (2010) ANSYS APDL Theory Guide, Release 14.5.

Houben, L.J.M, Huurman, M, Kooij, J., and Poot S. (2005), Modieslab Innovative Concrete Pavement Structure: From Idea through Research to Implementation, 8th International Conference on Concrete Pavement, Aug. 14-18, Colorado Springs, USA.

Kim, W.S, Nam, J.H, Min, G.H, Kim, K.J. and Lee, J.H.(2015) Detailed Analysis of Vertical Connector in Modular Roadway Slab under Temperature and Lifting Loading, draft of Journal of Korea Concrete Institute.

MIDAS (2012) Midas Civil 2012+ Analysis Reference, MIDAS Information Technology Co.

Ministry of Land, Transport and Maritime Affairs(2011), User Manual for Road Pavement Structure Design Program, Republic of Korea.

Ministry of Land, Transport and Maritime Affairs(2012), Korean Highway Bridge Design Code(Limit State Design), Korea Road and Transportation Association.

Ministry of Land, Transport and Maritime Affairs(2012), Concrete Structural Design Code.

Ministry of Land, Infrastructure and Transport(2013), Decree of Road Raw, Act 55th.

Ministry of Land, Infrastructure and Transport(2013), Regulation of Structure and facilities of Road.

MpdieSlab (2008), ModieSlab-A Revolutionary new road surface, Modieslab brochure, UK.

Okamura and Ouchi. (1998) Self-compacting high performance concrete, Structural Engineering and Materials, Vol I(4), pp. 378-383.

Park, S., Kim, W., Song, J. and Lee, S.Y. (2013) Joint Performance Evaluation and development of Modular Road System, Journal of Korean Society of Hazard Mitigation, 13(6), pp. 131-137.

Westergaard, H.M., (1926), Stresses in Concrete Pavements Computed by Theoretical Analysis, Public Roads, Vol. 7, pp. 25-35.