超高性能混凝土预应力锚固齿块承压性能研究

doi:10.11896/cldb.22010146

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Abstract In order to improve the pressure-bearing performance and durability of the prestressed anchor block, the prestressed anchor blocks of continuous rigid frame bridge were taken as research object and the compression performance test of the ultra-high performance concrete (UHPC) anchor blocks were carried out. The crack resistance, ultimate bearing capacity, failure characteristics and five typical local effects of the anchored tooth block under partial pressure and full pressure load were researched and the calculation formula of bearing capacity was proposed. The results show that UHPC can effectively improve the crack resistance and pressure-bearing capacity of the anchor tooth block. Compared with NC prestressed anchored tooth blocks, the crack resistance and ultimate bearing capacity of UHPC prestressed anchor blocks under local compressive load are increased by 2.51 times and 3.27 times, respectively. The improvement effect is remarkable. When designing the UHPC prestressed anchor tooth block, it is recommended that its size be designed to be 0.75 times the NC prestressed anchor tooth block under the condition of ensuring its mechanical properties and taking into account the economy. The local pressure-bearing failure mode of UHPC prestressed anchor block is obviously different from that of NC prestressed anchor block. Its integrity is better and only small cracks appear in the bottom plate and anchor block. The load-displacement curve has an obvious yield platform. At the same time, all prestressed anchor blocks show significant ‘under-anchor splitting effect’ and ‘post-anchor pulling effect’. Finally, based on the test results and finite element analysis, the calculation formula for the local bearing capacity of UHPC prestressed anchor blocks is revised. The accuracy of the calculation result is 95%, which can provide a theoretical reference for the practical application of engineering in the future.

Key words： UHPC prestressed anchor block local pressure-bearing capacity local effects

Published: 25 September 2023 Online: 2023-09-18

CLC number:

U448.213

Fund:National Natural Science Foundation of China (U20A20314, 51908093), the China Postdoctoral Science Foundation (2021M693919), the Chongqing Natural Science Foundation (cstc2020jcyj-msxmX0088) and Research and Innovation Project for Graduate Students of Chongqing Jiaotong University (2021S0017).

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	Articles by authors
	YANG Jun
	REN Wei
	LENG Jingchen
	ZHANG Zhongya
	ZOU Yang
	ZHOU Jianting
	HU Tianxiang

Cite this article:

YANG Jun,REN Wei,LENG Jingchen, et al. Research on Local Pressure Performance of Ultra-high Performance Concrete Prestressed Anchor Block[J]. Materials Reports, 2023, 37(18): 22010146-9.

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http://www.mater-rep.com/EN/10.11896/cldb.22010146 OR http://www.mater-rep.com/EN/Y2023/V37/I18/22010146

1 Li C X, Feng Z, Guo L C, et al. Highway Transportation Technology. 2020, 37(5), 53(in Chinese).
李传习, 冯峥, 郭立成, 等. 公路交通科技, 2020, 37(5), 53.
2 Kwon Y, Kim J K, Yang J M.Journal of Structural Engineering, 2018, 144(3), 04017219.
3 Feng Z, Li C X, Pan R S, et al. Chinese Journal of Highways, 2021, 34(8), 78(in Chinese).
冯峥, 李传习, 潘仁胜, 等. 中国公路学报, 2021, 34(8), 78.
4 Shao X D, Li F Y, Qiu M H, et al. China Journal of Highway and Transport, 2020, 33(4), 51(in Chinese).
邵旭东, 李芳园, 邱明红, 等. 中国公路学报, 2020, 33(4), 51.
5 Shao X D, Zhang L, Zhang S T, et al.Journal of Hunan University (Na-tural Science Edition), 2016, 43(3), 1(in Chinese).
邵旭东, 张良, 张松涛, 等. 湖南大学学报(自然科学版), 2016, 43(3), 1.
6 Shao X D, Qiu M H, Yan B F, et al.Materials Reports,2017, 31(23), 33(in Chinese).
邵旭东, 邱明红, 晏班夫, 等. 材料导报,2017, 31(23), 33.
7 Nie J, Li C X, Qian G P, et al.Materials Reports, 2021, 35(4),4042(in Chinese).
聂洁, 李传习, 钱国平, 等. 材料导报, 2021, 35(4),4042.
8 Shi J H, Shi C J, Ou Y X, et al.Materials Reports, 2021, 35(3), 3067(in Chinese).
史金华, 史才军, 欧阳雪, 等. 材料导报, 2021, 35(3), 3067.
9 Lu Zhe, Feng Zhengang, Yao Dongdong, et al.Materials Reports, 2020, 34(Z1), 203(in Chinese).
卢喆, 冯振刚, 姚冬冬, 等. 材料导报, 2020, 34(Z1), 203.
10 Zhang L. Research on external prestressed anchorage method of UHPC continuous box girder bridge. Master's Thesis, Hunan University, 2015(in Chinese).
张良. UHPC连续箱梁桥的体外预应力锚固方法研究. 硕士学位论文, 湖南大学, 2015.
11 Van-Meirvenne K, De-Corte W, Boel, V, et al.Engineering Structures, 2018, 172, 764.
12 Zhao J L. Research on force flow model and anti-cracking design method of prestressed anchorage zone of concrete bridge. Master's Thesis, Shanghai Jiao Tong University, China, 2010(in Chinese).
赵建立. 混凝土桥梁预应力锚固区的力流模型及抗裂设计方法研究. 硕士学位论文, 上海交通大学,2010.
13 Hou D W, Zhao J L, Shen J S L, et al.Construction and Building Mate-rials, 2017, 136, 482.
14 Jokūbaitis A, Marcˇiukaitis G, Valivonis J.Procedia Engineering, 2017, 172, 457.
15 Steensels R, Vandewalle L, Vandoren B, et al.Engineering Structures, 2017, 143, 384.
16 Li C X, Feng Z, Pan R, et al. Journal of Bridge Engineering, 2020, 25(6), 04020028.
17 Feng Z, Li C X, Pan R S,et al. Engineering Mechanics. 2020, 37(5), 94(in Chinese).
冯峥, 李传习, 潘仁胜, 等. 工程力学, 2020, 37(5), 94.
18 Technical specifications for the design of ultra-high performance concrete structures. China Concrete and Cement Products Association (draft for comments), Beijing, 2018(in Chinese).
超高性能混凝土结构设计技术规程. 中国混凝土与水泥制品协会(征求意见稿), 北京, 2018.
19 Technical specifications for ultra-high performance concrete (UHPC) bridges for highways. Beijing: China Engineering Construction Standardization Association Highway Branch (draft for comments), 2019(in Chinese).
公路超高性能混凝土(UHPC)桥梁技术规程. 北京:中国工程建设标准化协会公路分会(征求意见稿), 2019.
20 Kim J R, Kwak H G, Kim B S, et al.Advances in Structural Engineering, 2019, 22(2), 323.
21 Hu H B. Experimental study on local compressive bearing capacity of post-tensioned prestressed reactive powder concrete. Master's Thesis, Harbin Institute of Technology, China, 2012(in Chinese).
胡海波. 后张预应力活性粉末混凝土局压承载力试验研究. 硕士学位论文, 哈尔滨工业大学, 2012.
22 AASHTO LRFD bridge design specification (8th edition). Washington, DC: American Association of State Highway and Transportation Officials, 2017.
23 GB 50010-2010, Code for Design of Concrete Structures. Beijing: Ministry of Housing and Urban-Rural Development of the People's Republic of China(in Chinese).
GB 50010-2010, 混凝土结构设计规范. 北京: 中华人民共和国住房和城乡建设部.
24 Yang J, Fang Z. Concrete, 2008(7), 11(in Chinese).
杨剑, 方志. 混凝土, 2008(7), 11.
25 Zhang Z, Shao X D, Li W G, et al. China Journal of Highway and Transport, 2015, 28(8), 50(in Chinese).
张哲, 邵旭东, 李文光, 等. 中国公路学报, 2015, 28(8), 50.
26 Afgc S. Ultra-high performance fibre-reinforced concrete, Pairs, 2013.
27 Engineers J S O C. Recommendations for Design and Construction of High Performance Fiber Reinforced Cement Compositeswith Multiple Fine Cracks (HPFRCC). Japan, 2008.
28 Zheng W Z, Zhang J Z. Journal of Building Structures, 2004, 25(4), 60(in Chinese).
郑文忠, 张吉柱.建筑结构学报, 2004, 25(4), 60.