|Table of Contents|

Experimental study on bond performance of steel strands(PDF)

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

Issue:
2023年06期
Page:
91-100
Research Field:
建筑结构
Publishing date:

Info

Title:
Experimental study on bond performance of steel strands
Author(s):
LIU Bei1;  ZHANG Jiwen1; 2;  LI Xing1;  HAO Tianze1
(1. School of Civil Engineering, Southeast University, Nanjing 210096, Jiangsu, China; 2. Key Laboratory of C&PC Structures of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China)
Keywords:
steel strand;  anchoring form;  anchoring length;  bond performance
PACS:
TU378.8
DOI:
10.19815/j.jace.2022.02056
Abstract:
In order to study the bond performance of steel strands, 16 groups of steel strand-concrete pull-out specimens were designed and manufactured. A monotonic pull-out test was conducted on steel strands, and the influence of anchoring form(linear anchoring and 90° bending anchoring)and anchoring lengths(total anchoring length and vertical anchoring section length)on the bonding performance of steel strands was compared and analyzed from the aspects of failure mode, peak load, and peak slip. The results show that the failure of 16 groups of specimens is divided into two types of failure modes(pull-out failure of steel strands and fracture failure of steel strands), and the fracture failure of steel strands should be considered as the limit state in the design. The linear anchoring method of steel strands is difficult to ensure the full utilization of steel strand strength. Compared with the linear anchoring specimen, the 90° bending anchoring specimen has a larger peak load and smaller peak slip. The total anchoring length le≥ 500 mm is a prerequisite to ensure the full utilization of the strength of the steel strand. Under this condition, taking a total anchoring length le of 600 mm is the most effective way to limit the peak slip of the 90° bending steel strand. On the premise of ensuring a certain length of horizontal anchoring section, the larger the anchoring length lv of the vertical section of the steel strand, the smaller the peak slip of the specimen. When the length lv of the vertical anchoring section of the steel strand is taken as 10d(d is the nominal diameter of the steel strand), the decrease in peak slip is the most significant, and the degradation of anchoring stiffness during the nonlinear slip stage is the smallest. In practical engineering, when the steel strand adopts 90° bending anchoring method, the total anchoring length should be taken as 600 mm, and the length of the vertical anchoring section should be taken as 10d.

References:

[1] 武江传,张继文,蔡小宁,等.新型装配整体式梁柱节点低周反复荷载试验研究[J].施工技术,2017,46(4):9-12.
WU Jiangchuan,ZHANG Jiwen,CAI Xiaoning,et al.Experimental research on innovative concrete frame joint assembled with precast concrete beam under low cyclic loading[J].Construction Technology,2017,46(4):9-12.
[2]钟修华,杨基亮.先张法预应力预制整浇结构体系在多层物流仓库中的应用实践[J].安徽建筑,2020,27(9):69-70.
ZHONG Xiuhua,YANG Jiliang.Application practice of pretensioned prestressed precast integral casting structure system in multi-storey logistics warehouse[J].Anhui Architecture,2020,27(9):69-70.
[3]傅 斌.预应力施工方法在大型工业物流建筑中的应用[J].建筑施工,2019,41(8):1453-1455.
FU Bin.Application of prestressed construction method in large industrial logistics building[J].Building Construction,2019,41(8):1453-1455.
[4]武江传.新型预制预应力梁装配整体式框架抗震性能研究[D].南京:东南大学,2018.
WU Jiangchuan.Seismic behavior study on a new precast prestressed assembled structural system[D].Nanjing:Southeast University,2018.
[5]王莉莉,张继文.新型预制预应力混凝土梁装配框架节点受弯试验研究[J].工业建筑,2015,45(8):73-77,98.
WANG Lili,ZHANG Jiwen.Experimental investigation on flexural behavior of innovative concrete frame joint assembled with precast prestressed concrete beam[J].Industrial Construction,2015,45(8):73-77,98.
[6]王莉莉.新型预制PC梁装配整体式框架节点相关技术研究[D].南京:东南大学,2012.
WANG Lili.Investigation of innovative concrete frame joint assembled with precast prestressed concrete beam[D].Nanjing:Southeast University,2012.
[7]XIN G T,XU W B,WANG J,et al.Seismic performance of fabricated concrete piers with grouted sleeve joints and bearing-capacity estimation method[J].Structures,2021,33:169-186.
[8]闫维明,王文明,陈适才,等.装配式预制混凝土梁-柱-叠合板边节点抗震性能试验研究[J].土木工程学报,2010,43(12):56-61.
YAN Weiming,WANG Wenming,CHEN Shicai,et al.Experimental study of the seismic behavior of precast concrete layered slab and beam to column exterior joints[J].China Civil Engineering Journal,2010,43(12):56-61.
[9]混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出版社,2011.
Code for design of concrete structures:GB 50010—2010[S].Beijing:China Architecture & Building Press,2011.
[10]徐有邻.各类钢筋粘结锚固性能的分析比较[J].福州大学学报(自然科学版),1996,24(增1):71-77.
XU Youlin.Analysis and comparison of bonding and anchorage properties of various steel bars[J].Journal of Fuzhou University(Natural Sciences Edition),1996,24(S1):71-77.
[11]徐有邻,宇秉训,朱 龙,等.钢绞线基本性能与锚固长度的试验研究[J].建筑结构,1996,26(3):34-38,53.
XU Youlin,YU Bingxun,ZHU Long,et al.Essential properties of strand and experimental study of its anchoring lengths[J].Building Structure,1996,26(3):34-38,53.
[12]谢新莹,周 威,王宇扬.钢绞线混凝土黏结性能试验与锚固长度分析[J].哈尔滨工业大学学报,2018,50(12):81-88.
XIE Xinying,ZHOU Wei,WANG Yuyang.Experimental analysis of bond property and anchorage length for strands[J].Journal of Harbin Institute of Technology,2018,50(12):81-88.
[13]SALMONS J R,MCCRATE T E.Bond characteristics of untensioned prestressing strand[J].PCI Journal,1977,22(1):52-65.
[14]SU H S.Pullout bond characteristics of untensioned prestressing strand[J].Journal of the Korea Institute for Structural Maintenance and Inspection,2008,12(5):101-108.
[15]DANG C N,MURRAY C D,FLOYD R W,et al.Analysis of bond stress distribution for prestressing strand by Standard Test for Strand Bond[J].Engineering Structures,2014,72:152-159.
[16]MARTI-VARGAS J R,HALE W M,GARCIA-TAENGUA E,et al.Slip distribution model along the anchorage length of prestressing strands[J].Engineering Structures,2014,59:674-685.
[17]LI X,ZHANG J W,LIU B,et al.Pull-out behavior of non-prestressed steel strands in novel beam-to-column connection[J].Construction and Building Materials,2021,282:122538.
[18]白绍良,傅剑平,汤 华.框架中间层端节点梁筋直角弯折锚固端设计概念及方法的改进[J].重庆建筑工程学院学报,1994,16(3):1-12.
BAI Shaoliang,FU Jianping,TANG Hua.Improvements for the design concept and approach of the anchorage end 90-degree bent beam reinforcement in frame exterior joints[J].Journal of Chongqing Architecture University,1994,16(3):1-12.

Memo

Memo:
-
Last Update: 2023-12-01