Y.Uchida Gifu University, Gifu, Japan H.Mihashi & Y.Kaneko Tohoku University, Sendai, Japan S.Nakamura Utsunomiya University, Utsunomiya, Japan N.Kurihara Musashi Institute of Technology, Tokyo, Japan ABSTRJCT: In this pap~r, draft on the standard test method for determining tension softening properties of…
Y.Uchida Gifu University, Gifu, Japan H.Mihashi & Y.Kaneko Tohoku University, Sendai, Japan S.Nakamura Utsunomiya University, Utsunomiya, Japan N.Kurihara Musashi Institute of Technology, Tokyo, Japan ABSTRJCT: In this pap~r, draft on the standard test method for determining tension softening properties of concrete is proposed. T~1s test method evaluat.es the t~nsion softening diagram of concrete by analyzing the loa~-CMOD curve obtamed from the three-pomt bendmg test of notched concrete beam specimen. A round robm test was performed ~y some JCI members in Japan in order to verifying the accuracy of proposed stan- d~rd .test meth~d. A poly-lmear approximation .analysis method is employed to calculate the tension softening diagram by usmg a load-CMOD curve and this program was opened on the internet web site as a standard program. I INTRODUCTION 1.2 Outline 1.1 Back ground In this paper, activities of the WG 1 are summarized. In the Gifu Workshop (FRAMCOS-3, Japan), test A round robin test was performed by some J CI methods for mode I fracture of concrete were dis- members in Japan in order to verifying the accuracy cussed by the leading scientists and engineers of proposed standard test method. In this round robin (Kitsutaka & Mihashi 1998).