884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（1 北京市住宅建筑設(shè)計(jì)研究院有限公司，  北京 100005； 2 華北科技學(xué)院建筑工程學(xué)院，  北京 101601；3 北京思達(dá)建茂科技發(fā)展有限公司，  北京 100088）

［摘要］鋼筋套筒灌漿連接作為裝配式混凝土建筑中豎向鋼筋的主要連接方式得到廣泛應(yīng)用，但灌漿料凝固期內(nèi)，振動(dòng)環(huán)境對(duì)鋼筋套筒灌漿連接性能影響的研究很少。為研究早期振動(dòng)對(duì)鋼筋套筒灌漿連接性能的影響，對(duì)其進(jìn)行了試驗(yàn)研究。試驗(yàn)制作了15組試件，對(duì)3組鋼筋直徑20mm、振幅0.3mm、頻率2Hz的連接試件進(jìn)行單向拉伸試驗(yàn)、高應(yīng)力反復(fù)拉壓試驗(yàn)和大變形反復(fù)拉壓試驗(yàn)，對(duì)其他12組試件進(jìn)行單向拉伸試驗(yàn)。試驗(yàn)結(jié)果均為接頭外鋼筋拉斷破壞，接頭連接性能滿(mǎn)足規(guī)范要求。試驗(yàn)表明不同振幅時(shí)，連接試件的荷載-變形曲線大致相同，連接試件的極限變形隨振幅增大略有增加；振動(dòng)頻率的變化對(duì)連接試件的受力性能影響很??；相同應(yīng)力條件下，大直徑鋼筋的連接試件變形大于小直徑鋼筋。試驗(yàn)的振動(dòng)加載方式引起了連接鋼筋在套筒內(nèi)偏置，但在此偏心的不利影響下，套筒灌漿連接試件性能仍滿(mǎn)足規(guī)范要求。

［關(guān)鍵詞］振動(dòng)荷載；套筒灌漿連接；受力性能；型式檢驗(yàn)

中圖分類(lèi)號(hào)：TU375文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)05-0122-04

Experimental research on the influence of early vibration on mechanical behavior of grout sleeve splicing for rebars

LIU Minmin 1, LIU Yang2, SHI Biao1, ZHU Qinghua 3, GAI Yudi 1

(1 Beijing Institute of Residential Building Design & Research Co., Ltd., Beijing 100005, China；2 Architecture Engineering College, North China Institute of Science and Technology, Beijing 101601, China;3 Beijing Sidajianmao Science Technology Development Co., Ltd., Beijing 100088, China)

Abstract:As the main connection mode of vertical reinforcement in fabricated concrete buildings, grout sleeve splicing for rebars has been widely used. However, there is little research on the influence of vibration environment on the grout sleeve splicing during the solidification period of grouting material. In order to study the effect of early vibration on the properties of grout sleeve splicing for rebars, an experimental study was carried out. Fifteen groups of specimens were made, and unidirectional tensile test, high stress and large deformation repeated tension-compression test were carried out on three groups of connecting specimens with 20mm diameter of rebars, 0.3mm amplitude and 2Hz frequency, the other twelve groups of specimens were tested by unidirectional tensile tests. The test results show that the specimens are broken outside the joint and the connection performance meet the requirements of the specification. The test results show that the load-deformation curves of the specimens are roughly the same at different amplitudes, and the limit deformation of the joints increases slightly with the increase of amplitude. The change of frequency has little effect on the mechanical properties of the specimens. Under the same stress condition, the  deformation of large-diameter steel connecting  specimens is larger than that of small-diameter steel connecting specimens. The vibration loading mode in the test causes the steel bar to be biased in the sleeve, but the performance of grout sleee splicing connecting specimen still meets the requirements of the specification under the adverse influence of the eccentricity.

Keywords:vibration load;grout sleeve splicing;mechanical performance;type inspection

作者簡(jiǎn)介：劉敏敏，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:liuminmin@zzjz.com；通信作者：劉洋，碩士，Email:511299365@qq.com。