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

(沈陽(yáng)建筑大學(xué)土木工程學(xué)院, 沈陽(yáng) 110168)

摘要: 為研究專用預(yù)埋鋼絞線吊件與混凝土之間的粘結(jié)錨固強(qiáng)度,考慮不同錨固長(zhǎng)度、彎折角度、末端形式對(duì)承載力的影響. 對(duì)專用預(yù)埋鋼絞線吊件進(jìn)行了與混凝土粘結(jié)錨固強(qiáng)度的試驗(yàn)、三種拉拔承載力試驗(yàn)以及與圓鋼吊環(huán)試驗(yàn)對(duì)比試驗(yàn). 通過(guò)試驗(yàn)確定了預(yù)埋鋼絞線吊件與混凝土之間的粘結(jié)錨固強(qiáng)度. 結(jié)果表明:鋼絞線吊件的錨固長(zhǎng)度達(dá)到 40d(d 為鋼鉸線直徑)以上時(shí),粘結(jié)錨固力會(huì)大于吊件強(qiáng)度,使鋼絞線吊件發(fā)生屈服破壞,鋼絞線吊件的彎折角度在 120° ~ 150°中間對(duì)鋼絞線吊件承載力基本沒(méi)有影響,鋼絞線吊件的末端經(jīng)過(guò)處理后破壞形態(tài)由脆性變?yōu)檠有郧页休d力有所增加. 結(jié)果表明,鋼絞線吊件具有良好的力學(xué)性能,鋼絞線吊件在承載力方面優(yōu)于圓鋼吊環(huán).

關(guān)鍵詞: 鋼絞線吊件; 錨固長(zhǎng)度; 拉拔承載力試驗(yàn); 末端處理; 力學(xué)性能

中圖分類號(hào):TU375 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)05-0103-07

DOI:10. 19701 / j. jzjg. 20201079

Experimental study on mechanical properties of special embedded lifting loop of strand

MENG Xianhong, SUN Chen, XIA Cheng

(School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China)

Abstract: In order to study the bonding anchorage strength between the special embedded lifting loop of strand and theconcrete, the effect on bearing capacity was considered under various anchorage length,bending angle and the forms of theend. The experiments had been done concerning special embedded lifting loop of strand, namely, the experiment ofbonding anchorage strength with the concrete,three experiments of pull-out bearing capacity and the comparative experimentagainst round steel lifting ring. The bonding anchorage strength between the embedded lifting loop of strand and theconcrete was determined by experiments. The results show that yield sabotage would be occur to the lifting loop of strandwhen whose anchorage length was up to 40d ( d is the diameter of steel strand) or longer, simultaneously, the bondinganchoring force would be greater than the strength of the lifting loop. At the condition that the bending angle of the liftingloop of strand is between 120° ~ 150°, which basically has no significant effect on the bearing capacity of lifting loops ofstrand. The failure form of the lifting loop of strand changed from brittle to ductile and the bearing capacity increased afterwhose end forms had been treated. The results show that lifting loop of strand has excellent mechanical properties and it isbetter than round steel lifting ring of bearing capacity.

Keywords:lifting loop of strand; anchorage length; pull-out bearing capacity test; end treatment; mechanical property

∗“十三五”國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFC0701700),遼寧省自然科學(xué)基金(20180550486).

第一作者:孟憲宏,博士,教授,碩士生導(dǎo)師,主要從事鋼筋混凝土結(jié)構(gòu)研究,Email:sjzuxianhong_meng@ foxmail. com.

[引用本文] 孟憲宏,孫晨,夏程. 專用預(yù)埋鋼絞線吊件力學(xué)性能試驗(yàn)研究[J]. 建筑結(jié)構(gòu),2023,53(5):103-109.MENG Xianhong,SUN Chen,XIA Cheng. Experimental study on mechanical properties of special embedded lifting loops ofstrand[J]. Building Structure,2023,53(5):103-109.