【摘要】：以雙K斷裂理論為基礎(chǔ),基于標(biāo)準(zhǔn)鋼筋混凝土三點(diǎn)彎曲梁斷裂特性,推導(dǎo)了非標(biāo)準(zhǔn)鋼筋混凝土三點(diǎn)彎曲梁斷裂參數(shù)計(jì)算公式.開展了非標(biāo)準(zhǔn)鋼筋混凝土三點(diǎn)彎曲梁試件斷裂試驗(yàn),研究了其斷裂參數(shù)的變化規(guī)律.結(jié)果表明:試件荷載值隨試件高度的增加而增大;而試件的亞臨界擴(kuò)展相對值、斷裂韌度、起裂斷裂韌度和失穩(wěn)斷裂韌度均不隨試件高度的增加而變化,可認(rèn)為是常數(shù).
[Abstract]:Based on the double-K fracture theory and based on the fracture characteristics of standard reinforced concrete three-point bending beam, the formula for calculating the fracture parameters of non-standard reinforced concrete three-point bending beam is derived. The fracture test of non-standard reinforced concrete three-point bending beam is carried out, and the variation of fracture parameters is studied. The results show that the load value of the specimen increases with the increase of the specimen height, while the subcritical propagation relative value, the fracture toughness, the initiation fracture toughness and the instability fracture toughness of the specimen do not change with the increase of the specimen height, which can be regarded as a constant.
【作者單位】： 南京水利科學(xué)研究院;水文水資源與水利工程科學(xué)國家重點(diǎn)實(shí)驗(yàn)室;鄭州大學(xué)水利與環(huán)境學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51325904,51279111,51309163,51409162) 江蘇省自然科學(xué)基金資助項(xiàng)目(BK20140081) 中國博士后科學(xué)基金資助項(xiàng)目(2014M551624) 江蘇省博士后科研資助計(jì)劃項(xiàng)目(1302055B)
【分類號】：TU375.1

【參考文獻(xiàn)】

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