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Volume 43 Issue 9
Dec.  2014
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Article Contents
Wang Haichao, Wang Zhijun, Gao Shuling, Sun Fangning, Zhang Lingling, Qin Jingping. EXPERIMENTAL DETERMINATION OF FRACTURE TOUGHNESS OF THREE-POINT BENDING UHPCC BEAM AND INFLUENCE LAW[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(9): 106-110. doi: 10.13204/j.gyjz201309020
Citation: Wang Haichao, Wang Zhijun, Gao Shuling, Sun Fangning, Zhang Lingling, Qin Jingping. EXPERIMENTAL DETERMINATION OF FRACTURE TOUGHNESS OF THREE-POINT BENDING UHPCC BEAM AND INFLUENCE LAW[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(9): 106-110. doi: 10.13204/j.gyjz201309020

EXPERIMENTAL DETERMINATION OF FRACTURE TOUGHNESS OF THREE-POINT BENDING UHPCC BEAM AND INFLUENCE LAW

doi: 10.13204/j.gyjz201309020
  • Received Date: 2012-11-08
  • Publish Date: 2013-09-20
  • Through the tests of 14 sets of three-point bending UHPCC beam specimens with the different compressivestrength,sizes and initial crack-depth ratios,their double-K fracture parameters are studied. The initial fracturetoughness KiniIC and unstable fracture toughness KunIC are calculated from the initial load Pini,the maximum load Pmax andcritical crack mouth open displacement CMODC . The results indicate that the KiniIC and KiniIC of UHPCC and cementbasedspecimens increase with the increasing of compressive strength. The KiniIC and KunIC of UHPCC significantlyincrease with the decrease of initial crack-depth ratio,but the KiniIC (KunIC ) of cement-based specimens increase a little.The KiniIC and KunIC of UHPCC significantly increase with the increase of specimen size,but that of cement-basedspecimens present some discreteness.
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