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contributor authorLei Shen
contributor authorGiovanni Di Luzio
contributor authorDe Zhu
contributor authorXiupeng Yao
contributor authorGianluca Cusatis
contributor authorMaosen Cao
contributor authorYang Han
contributor authorYong Wang
contributor authorQingwen Ren
date accessioned2022-02-01T21:50:33Z
date available2022-02-01T21:50:33Z
date issued11/1/2021
identifier other%28ASCE%29EM.1943-7889.0001991.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4272142
description abstractThe mechanical responses of steel fiber–reinforced concrete (SFRC) thermally damaged at high temperature needs a deeper evaluation via a mesoscopic model that explicitly treats the fibers. For this demand, the lattice discrete particle model for SFRC after high temperature (LDPM-F-HT) is formulated. A series of experimental tests for SFRC with 0%, 1%, and 2% of steel fiber volume fraction with different heating treatments are performed to calibrate and validate the LDPM-F-HT. It is found that the nonmonotone decreasing of the macroscopic compressive strength up to 400°C is caused by the slower thermal degradation of shear strength than that of tensile strength at the mesoscale. The good matches between the experimental and numerical results demonstrate that LDPM-F-HT can capture also this phenomenon. In the numerical simulation of three-point bending tests, it is observed that the dimension of the fracture process zone (FPZ) at load peak increases with the increase of fiber content and heating temperatures. However, the FPZ width in SFRC reaches its maximum value after the thermal treatment of 450°C rather than 600°C.
publisherASCE
titleMechanical Responses of Steel Fiber–Reinforced Concrete after Exposure to High Temperature: Experiments and Mesoscale Discrete Modeling
typeJournal Paper
journal volume147
journal issue11
journal titleJournal of Engineering Mechanics
identifier doi10.1061/(ASCE)EM.1943-7889.0001991
journal fristpage04021084-1
journal lastpage04021084-12
page12
treeJournal of Engineering Mechanics:;2021:;Volume ( 147 ):;issue: 011
contenttypeFulltext


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