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  Numerical Study of Waterproofing Membrane Considering Contact Behavior

  An waterproofing membrane has a relatively higher initial strength, faster construction time and higher waterproofing performance than the conventional sprayed concrete linings. Waterproofing membrane mainly consists of polymers and its supporting potential is from the adhesion at the interface and tensile strength which is distinct from the conventional method such as the shotcrete. However, waterproofing membrane is not a well-known material even recently highly in demand due to its outstanding properties. In this study, to evaluate material properties and interface parameters of waterproofing membrane, laboratory experiments and numerical study were carried out. Because the contact behavior of waterproofing membrane at the interface is important parameter to understand the supporting mechanism of waterproofing membrane, two contact models, i.e. combination of cohesive and a damage model, was adopted at the interface in the numerical analysis.

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