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(1 中建科技集團(tuán)有限公司， 北京 100070；2 西南交通大學(xué)土木工程學(xué)院， 成都 610031)

［摘要］基于鋼筋環(huán)扣連接技術(shù)設(shè)計(jì)了一種裝配式綜合管廊，對這種裝配式綜合管廊進(jìn)行拆分并選取角部不利節(jié)點(diǎn)進(jìn)行抗彎試驗(yàn)，包括1組頂板節(jié)點(diǎn)與1組底板節(jié)點(diǎn)，每組含1個現(xiàn)澆節(jié)點(diǎn)與3個預(yù)制節(jié)點(diǎn)，探究了節(jié)點(diǎn)的受彎破壞特征。結(jié)果表明：現(xiàn)澆與預(yù)制節(jié)點(diǎn)的變形能力、承載能力、破壞模式等指標(biāo)均相近。其中，預(yù)制頂板節(jié)點(diǎn)的開裂荷載與現(xiàn)澆節(jié)點(diǎn)的比值為0.87，預(yù)制底板節(jié)點(diǎn)開裂荷載與現(xiàn)澆節(jié)點(diǎn)的比值為1.07，而預(yù)制頂板節(jié)點(diǎn)與現(xiàn)澆節(jié)點(diǎn)屈服荷載的比值以及預(yù)制頂板節(jié)點(diǎn)與現(xiàn)澆節(jié)點(diǎn)極限荷載的比值在0.98~1.03之間，預(yù)制節(jié)點(diǎn)與現(xiàn)澆節(jié)點(diǎn)的各項(xiàng)指標(biāo)幾乎沒有區(qū)別，也證明了鋼筋環(huán)扣連接技術(shù)運(yùn)用于裝配式綜合管廊的可靠性。另外，對現(xiàn)澆與預(yù)制兩種節(jié)點(diǎn)分別進(jìn)行了數(shù)值模擬，其破壞模式和荷載-位移曲線與試驗(yàn)結(jié)果吻合較好，給出了合理的數(shù)值建模依據(jù)。 

［關(guān)鍵詞］鋼筋環(huán)扣連接節(jié)點(diǎn)；裝配式綜合管廊；抗彎性能；擬靜力試驗(yàn)

中圖分類號：TU318 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)16-0029-06

Research on bending performance of reinforced ring buckle connection node of assembled utility tunnel 

YAN  Tao1,  WU  Weilin2,  ZHOU  Chong1,  GUO  Zhipeng1,  WEI  Jingmin1,  LI  Zhangmiao1 

(1 China Construction Science & Technology Group Co., Ltd., Beijing 100070， China；2 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031， China) 

Abstract: Based on the steel ring buckle connection technology, a assembled utility tunnel was designed. This kind of assembled utility tunnel was divided and unfavorable nodes were selected, including one set of top plate node  and one set of bottom plate node. Each group contains 1 cast-in-place node  and 3 precast nodes. The bending failure characteristics of the specimens were explored. The results show that the deformation capacity, bearing capacity and failure mode of cast-in-place and precast nodes are similar. Among them, the ratio of crack load precast to the cast-in-place node specimen is 0.87, and the ratio of crack load precast to cast-in-place test specimen of the bottom plate test specimen is 1.07. The ratio of the yield load of the precast to the cast-in-place joint and the ratio of the ultimate load of the precast to the cast-in-situ joint are between 0.98 and 1.03. There is almost no difference between precast nodes and cast-in-place nodes, and it also proves the reliability of the application of the reinforced ring buckle connection technology in the assembled utility tunnel. In addition, numerical simulations were performed on the cast-in-place and precast nodes. The failure mode and load-displacement curves are in good agreement with the test results, and a reasonable numerical model basis is given. 

Keywords:reinforced ring buckle connectionnode； assembled utility tunnel； bending performance; pseudo-static test

*中建股份有限公司科技研發(fā)課題資助項(xiàng)目（CSCEC-2019-Z-16）。

 作者簡介：嚴(yán)濤，學(xué)士，一級注冊結(jié)構(gòu)工程師，Email：yt4561@qq.com。