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(1 山東高廣高速公路有限公司， 濱州 256600； 2 山東交通學(xué)院土木工程系， 濟(jì)南 250023；3 山東大學(xué)巖土與結(jié)構(gòu)工程研究中心， 濟(jì)南 250061)
摘要: 為研究波形鋼腹板組合梁受彎破壞過程中彈性階段體外預(yù)應(yīng)力增量的影響因素和計算方法，驗(yàn)證了基于光纖的智能預(yù)應(yīng)力鋼絞線在橋梁工程中應(yīng)用的可行性和優(yōu)越性，基于光纖光柵智能鋼絞線技術(shù)對波形鋼腹板組合梁模型開展試驗(yàn)研究。 考慮了荷載形式、剪切變形和二次效應(yīng)，推導(dǎo)了彈性階段適用于波形鋼腹板組合梁的體外預(yù)應(yīng)力筋應(yīng)力增量的計算公式。 研究結(jié)果表明:公式計算結(jié)果與試驗(yàn)結(jié)果吻合較好；在彈性階段，二次效應(yīng)對彈性階段體外預(yù)應(yīng)力增量的影響為 0. 2%，可以忽略不計；光纖光柵傳感器和振弦式壓力傳感器測量的錨下預(yù)應(yīng)力￣荷載的發(fā)展規(guī)律相同，測試數(shù)據(jù)的誤差最大值為 4. 01%，證明了光纖光柵智能鋼絞線技術(shù)在工程應(yīng)用中的可行性和準(zhǔn)確性；光纖光柵智能鋼絞線技術(shù)不僅具有傳統(tǒng)鋼絞線優(yōu)異的力學(xué)指標(biāo)和優(yōu)良的感知性能，而且突破了振弦式傳感器監(jiān)測測點(diǎn)少的局限性，所以光纖光柵智能鋼絞線技術(shù)比振弦式壓力傳感器更具優(yōu)越性。
關(guān)鍵詞: 波形鋼腹板組合梁； 預(yù)應(yīng)力筋； 光纖光柵智能鋼絞線； 二次效應(yīng)； 應(yīng)力增量
中圖分類號: TU398+.1 文獻(xiàn)標(biāo)志碼:A 文章編號:1002￣848X(2022)06￣0119￣07
DOI:10. 19701 / j.jzjg.20190780
Model test and suggested formula of external prestressed tendons ofcorrugated steel web composite beams
CAO Hongliang1， LI Guanghao2， LU Xiaorui3， GAO Huarui3
(1 Shandong Gaoguang Expressway Group Co.， Ltd.， Binzhou 256600， China；2 Department of Civil Engineering， Shandongjiaotong University， Jinan 250023， China；3 Geotechnical and Structural Engineering Research Center of Shandong University， Jinan 250061， China)
Abstract: In order to study the influencing factors and calculating methods in the elastic stage prestressed increment ofprestressed tendons in corrugated steel web composite beam under bending failure process. The feasibility and superiority ofthe application of intelligent prestressed steel strand based on optical fiber in bridge engineering were verified. Based on thetechnology of fiber grating fiber grating intelligent steel strand and the model of corrugated steel web composite beam，theexperimental research was carried out. Considering the load form， shear deformation and secondary effect， the calculationformula of stress increment of external prestressed tendon for corrugated steel web composite beam in elastic stage wasdeduced. The results show that the calculating results are in good agreement with the experimental results. The effect ofsecond￣order effect on external prestressing increment of the elastic stage is 0. 2%， which could be ignored. Thedevelopment law of effective prestressed￣load measuring by fiber grating sensor and vibrating string pressure sensor is same，and the maximum error of test data is 4. 01%. The feasibility and accuracy of fiber grating intelligent steel strand technologyin engineering application are proved. Fiber grating intelligent steel strand technology not only has the traditional steelstrand excellent mechanical indicators and excellent perceptual performance，but also breaks through the limitation of fewermonitoring points of vibrating string sensor， so the fiber grating intelligent steel strand technology is more advantageous thanvibrating string pressure sensor.
Keywords:corrugated steel web composite beam； prestressed tendon； fiber grating intelligent steel strand； second￣ordereffect； stress increment
∗山東省高等學(xué)?？萍加媱濏?xiàng)目(J15LG02)。
第一作者:曹洪亮，學(xué)士，高級工程師，主要從事公路橋梁建設(shè)管理等方面的研究，Email:1090959229@ qq.com。
[引用本文] 曹洪亮，李廣昊，陸小蕊，等. 波形鋼腹板組合梁體外預(yù)應(yīng)力筋模型試驗(yàn)及建議公式[ J]. 建筑結(jié)構(gòu)，2022，52(6):119￣125. CAO Hongliang， LI Guanghao， LU Xiaorui， et al. Model test and suggested formula of externalprestressed tendons of corrugated steel web composite beams[J]. Building Structure，2022，52(6):119￣125.
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