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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

36卷

期数:

2019年02期

页码:

21-29

栏目:

出版日期:

2019-03-26

文章信息/Info

Title:

Mechanical Performance of Reinforcement Grouted Sleeve Connection

文章编号:

1673-2049(2019)02-0021-09

作者:

吴 涛,王 珅,刘毅斌,张 彬

(长安大学 建筑工程学院,陕西 西安 710061)

Author(s):

WU Tao, WANG Shen, LIU Yi-bin, ZHANG Bin

(School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China)

关键词:

预制装配式结构;  套筒灌浆连接;  拉拔试验;  筒壁应力

Keywords:

prefabricated assembly structure;  grouted sleeve connection;  pull-out test;  sleeve wall stress

分类号:

TU377.9

DOI:

-

文献标志码:

A

摘要:

对20个套筒灌浆连接件进行单轴拉伸试验,研究了套筒种类、锚固长度和钢筋直径对套筒筒壁应变的影响。采用ANSYS Workbench有限元软件,以钢制套筒连接件为原型进行建模分析,对比了试验和有限元模拟得到的钢筋应力-筒壁应变曲线。采用相同的建模方法建立了2种规格的钢制套筒连接件模型,通过模拟试件的单轴受拉试验研究了净距改变对套筒筒壁应变的影响。结果表明:钢筋直径和锚固长度相同的钢制套筒与铸铁套筒对比,其筒壁应变在相同钢筋应力水平下较小; 当套筒材质、钢筋直径相同时,连接锚固越长的试件具有越小的筒壁应变值; 以连接钢筋直径作为变量时,连接钢筋越粗的试件其筒壁应变值越大; 模拟的曲线可以反映出试件的破坏过程,可以较好地表现出筒壁测点的应变实际发展,证明有限元方法能够有效模拟套筒灌浆连接件单向拉伸状态下的受力状态; 在相同拉力水平下,净距大的连接件筒壁部分的筒壁应变较小。

Abstract:

Twenty grouted sleeve connections were tested under uniaxial tension, and the effects of sleeve type, anchorage length and reinforcement diameter on the strain of sleeve wall were studied. Using finite element software ANSYS Workbench and taking steel sleeve connections as prototype, the stress-strain curves of steel bars obtained by experiment and finite element simulation were compared. Using the same modeling method, two models of steel sleeve connections with different specifications were established. The effect of net distance change on the strain of sleeve wall was studied by uniaxial tension test of simulated specimens. The results show that compared with cast iron sleeve, steel sleeve with the same diameter and anchorage length has smaller wall strain at the same steel stress level. When the material of sleeve and the diameter of reinforcement are the same, the longer the connection anchorage, the smaller the strain of the tube wall. When the diameter of the connecting bar is taken as a variable, the thicker the connecting bar is, the larger the strain value of the tube wall is. The simulation curves can reflect the failure process of the specimens and show the actual development of strain at the measured points of the tube wall. It is proved that the finite element method can effectively simulate the stress state of the sleeve grouted connections under uniaxial tension. At the same tension level, the tube wall strain of the barrel part with large net distance is small.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2018-08-27
基金项目:国家自然科学基金项目(51578072,51708036); 陕西省科技统筹创新工程计划项目(2015KTZDSF03-04)
作者简介:吴 涛(1976-),男,安徽霍山人,教授,博士研究生导师,工学博士,E-mail:wutao@chd.edu.cn。

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更新日期/Last Update: 2019-03-27