Evaluation of time-dependent strain loss in CFRP eccentrically reinforced Shrinkage Compensating Concrete (SHCC) flexural members

被引：2

作者：

Cao, Qi ^{[1
,2
]}

Zhou, Jianpu ^{[1
]}

Wang, Xiaofeng ^{[1
]}

Wang, Jizhong ^{[1
]}

Ma, Zhongguo John ^{[3
]}

机构：

[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China

[2] Ocean Engn Joint Res Ctr DUT UWA, Dalian 116024, Peoples R China

[3] Univ Tennessee Knoxville, Dept Civil & Environm Engn, 313 John D Tickle Bldg, Knoxville, TN 37996 USA

来源：

KSCE JOURNAL OF CIVIL ENGINEERING | 2018年 / 22卷 / 01期

基金：

中国国家自然科学基金;

关键词：

strain; prestress; CFRP; shrinkage; creep; eccentric; STRENGTH CONCRETE; PRESTRESS LOSS; BEAMS;

D O I：

10.1007/s12205-017-0557-2

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Eccentrically CFRP enclosed Shrinkage Compensating Concrete (SHCC) flexural members show benefits of easy prestressing, better durability and self-made camber compared with traditional prestressed concrete. This paper presents the experimental and analytical work to evaluate the expansion strain losses in the proposed flexural members. A proposed analytical model to calculate the time-dependent strain losses is established including variables of shrinkage and creep of SHCC concrete based on GL2000 model. The relationship between maximum expansion strain and axial stiffness of FRP (EA) is also constructed. The same procedure was also conducted for Portland Cement Concrete (PCC) for the CFRP-PCC beam specimens. It is indicated that the proposed analytical model produces an accurate prediction in strain losses over time.

引用

页码：196 / 203

页数：8

共 14 条

[1] Estimating prestress loss in pretensioned, high-strength concrete members
Al-Omaishi, Nabil
Tadros, Maher K.
Seguirant, Stephen J.
[J]. PCI JOURNAL, 2009, 54 (04): : 132 - 159
[2] [Anonymous], 2011, Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary
[3] Prestress loss in externally FRP reinforced self prestressing concrete beams
Cao, Qi
Tao, Jinju
Ma, Zhongguo John
[J]. CONSTRUCTION AND BUILDING MATERIALS, 2015, 101 : 667 - 674
[4] Cao Q, 2011, ACI STRUCT J, V108, P592
[5] Prestress losses evaluation in prestressed concrete prismatic specimens
Caro, L. A.
Marti-Vargas, J. R.
Serna, P.
[J]. ENGINEERING STRUCTURES, 2013, 48 : 704 - 715
[6] CEB-FIP, 1990, B INF COM CEB FIP, p213/214
[7] Short and long-term bond performance of prestressed FRP sheet anchorages
Diab, Hesham
Wu, Zhishen
Iwashita, Kentaro
[J]. ENGINEERING STRUCTURES, 2009, 31 (05) : 1241 - 1249
[8] Anchorage System to Prestress FRP Laminates for Flexural Strengthening of Steel-Concrete Composite Girders
El-Hacha, Raafat
Aly, Mohamed Y. E.
[J]. JOURNAL OF COMPOSITES FOR CONSTRUCTION, 2013, 17 (03) : 324 - 335
[9] Gardner NJ, 2001, ACI MATER J, V98, P159
[10] Saadatmanesh H, 1999, ACI MATER J, V96, P143

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