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型鋼輕骨料混凝土梁斜截面受剪承載力試驗(yàn)與計(jì)算
劉凡1,翁曉紅1,邵永健1,2,趙鴻鐵2,夏敏1
摘 要

(1 江蘇省結(jié)構(gòu)工程重點(diǎn)實(shí)驗(yàn)室(蘇州科技學(xué)院),蘇州 215011;2 西安建筑科技大學(xué)土木工程學(xué)院,西安 710055)
[摘要]為研究型鋼輕骨料混凝土梁的受剪承載力,進(jìn)行了15根型鋼輕骨料混凝土梁和2根型鋼普通混凝土梁的受剪性能試驗(yàn)?;趯?duì)于型鋼普通混凝土梁斜截面受剪承載力計(jì)算公式的分析結(jié)論,提出了型鋼輕骨料混凝土梁斜截面受剪承載力的計(jì)算公式模型,并利用該計(jì)算模型對(duì)17根試驗(yàn)梁的斜截面受剪承載力進(jìn)行了分析,當(dāng)計(jì)算模型中的參數(shù)ω1=ω2=ω3=1.76時(shí),該模型可作為型鋼輕骨料混凝土梁受剪承載力的平均值計(jì)算公式,此時(shí)試驗(yàn)實(shí)測(cè)值與公式計(jì)算值之比的平均值為1.000,標(biāo)準(zhǔn)差為0.093;當(dāng)計(jì)算模型中的參數(shù)ω1=ω2=ω3=1.0時(shí),該計(jì)算公式模型可作為型鋼輕骨料混凝土梁受剪承載力的設(shè)計(jì)計(jì)算公式。而且兩種情況下試驗(yàn)實(shí)測(cè)值與公式計(jì)算值的比值隨剪跨比λ的變化平緩,說明隨λ的變化,公式的可靠度基本不變。
[關(guān)鍵詞]型鋼輕骨料混凝土;梁;剪跨比;受剪承載力;計(jì)算公式
Experiment and calculation of shear capacity of steel reinforced lightweight aggregate concrete beams
Liu Fan1, Weng Xiaohong1, Shao Yongjian1,2, Zhao Hongtie2, Xia Min1 (1 Jiangsu Key Laboratory of Structure Engineering(University of Science and Technology of Suzhou), Suzhou 215011, China;2 School of Civil Engineering, Xi′an University of Architecture & Technology, Xi′an 710055, China)
Abstract:In order to study the shear capacity of steel reinforced lightweight aggregate concrete(SRLC) beams,fifteen SRLC beams and two steel reinforced normal density concrete beams were tested. The inclined section shear strength of these beams are analyzed.And the calculation formula model of the inclined section shear strength of SRLC beam is presented on basis of the analysis of calculation formula of the inclined section shear strength of steel reinforced normal density concrete beams. When the parameters ω1=ω2=ω3=1.76 in calculation formula model, this calculation formula model could be used as the average calculation formula of shear strength of SRLC beams.  The average of the ratios of the measured values to the calculation values according to the calculation formula is 1.000, and the standard deviation is 0.093. When the parameters ω1=ω2=ω3=1.0 in calculation formula model, this calculation formula model could be used as the design calculation formula of shear strength of SRLC beams. Under above mentioned two conditions, the ratios of the measured values to the calculation values vary mildly as the shear span ratio λ changed. This proves that the reliability of calculation formula is not variable fundamentally when λ changed.
Keywords:steel reinforced lightweight aggregate concrete(SRLC); beams; shear span ratio; shear capacity; calculation formula
建設(shè)部科技研究項(xiàng)目(01-2-20)。作者簡介:劉凡(1963-),男,副教授,工學(xué)碩士。
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