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超高强混凝土双K断裂参数及断裂能试验研究

Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2017-08-25

Journal: 水力发电学报

Included Journals: CSCD、Scopus

Volume: 36

Issue: 8

Page Number: 86-93

ISSN: 1003-1243

Key Words: 混凝土;强度等级;双K断裂参数;初始缝高比;断裂能

Abstract: 本文采用尺寸为480 mm×120 mm×60 mm的混凝土三点弯曲梁试件,利用试验测得的起裂荷载Pini、峰值荷载Pmax.及对应的裂缝口张开位移CMOD.等参数,得到了强度为115.8 MPa的超高强混凝土的起裂断裂韧度KiniIC、失稳断裂韧度KunIC及断裂能Gf,并与其他强度等级混凝土进行了对比.结果表明,超高强混凝士的KiniIC、KunIC与初始缝高比无关;当初始缝高比相同时,KiniIC、KunIC及Gf随着混凝土强度等级的提高而增大.

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