Abstract
Engineered cementitious composite (ECC), known for its saturated multiple cracking and extraordinary tensileductility, is considered as one of the most promising cement-based materials in construction industry. To ensurestructural safety, it is crucial to evaluate the reliability of ECC and to develop a reliability-based design approach.In this study, mechanical tests on 222 compression and 120 direct tensile specimens across five ECC strengthgrades (C30-C50) were conducted. A statistically consistent yield strength was defined as 0.81 times the tensilepeak strength of ECC. The statistical characteristics of key mechanical properties for reliability analysis weredetermined. Partial safety factors (PSF) for ECC were calibrated using First Order Reliability Method (FORM) tomeet varying target reliability indices. The results show that the material PSF values for tensile failure andcompressive failure of ECC were suggested as 1.33 and 1.29, respectively, which were validated to achieve abalanced design between structural safety and economic efficiency. This work offers a practical and codecompatiblereliability-based design approach for ECC in structural applications.
NETL
NSTL