STUDY ON INTERFACIAL BOND-SLIP RELATIONSHIP BETWEEN HSSWM-ECC AND CONCRETE

Eminent interfacial bond behavior is a prerequisite to ensure the cooperative work between high-strength steel wire mesh reinforced engineered cementitious composite (HSSWM-ECC) and concrete, and the effectiveness of the interfacial bonding determines the utilization of the performance of HSWM-ECC. In order to study the interfacial bond performance between HSSWM-ECC and concrete, nine groups of modified beam specimens (totally 27 specimens) were designed and tested by considering the influences of the factors such as concrete compressive strength, interfacial bond length, interfacial bond width and, interfacial treatment methods. According to the test results, the bond failure characteristics and stress mechanism of the interface between HSSWM-ECC and ECC were explored, and the interfacial bond-slip relationship model was developed by considering the influences of design parameters. A micro-segment analysis method was used to analyze the characteristic parameters of the model. The study results showed that the proposed model and model parameter calculation formulas agree well with test results and can well characterize the mechanical behavior of the interfacial bond-slip relationship between HSSWM-ECC and concrete.