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Mechanoluminescent Visualization of Crack Propagation for Joint Evaluation
Published on: January 6, 2023
Joint- or Crack-Opening Resistance Evaluation of Waterproofing Material and System for Structural Sustainability in
Kyu-Hwan Oh1, Soo-Yeon Kim2, Yong-Gul Park1
1Department of Railway Construction, Graduate School of Railway, Seoul National University of Science & Technology, Gongneung-ro, Nowon-gu, Seoul 01811, Korea.
Abstract:
A joint- or crack-opening resistance evaluation method for the selection of optimal waterproofing material for a railroad bridge deck is proposed. The joint opening range (mm) for the evaluation, and a typical load case of a high-speed double-track railroad bridge structure deck, is analyzed through the finite element method (FEM) and the results of analysis are used to calculate the minimum opening range. The evaluation method is then demonstrated with 4 commonly used waterproofing types of cementitious membrane system: a polyurethane coating system, self-adhesive asphalt sheet system and synthetic polymerized rubber gel composite asphalt sheet system. Five specimens of each type are subjected to continuous joint opening under 4 different joint width range conditions (1.5, 3.0, 4.5, and 6.0 mm), and the joint-opening resistance performance is compared. The proposal for the evaluation criteria and the specimen test results demonstrate how the evaluation method is pertinent for future selection of waterproofing membranes for the sustainability of high-speed railroad bridge deck structures.
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