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Abstract

In order to study the reliability of reinforced ultra-high performance concrete (UHPC), a calculation model of the flexural capacity of the reinforced UHPC section was proposed, and the applicability of the model was verified by the existing test results. Through the calculation example of strengthening RC simply supported beams by increasing the section of UHPC, the JC check point method was finally employed to obtain the reliability before and after reinforcement, combined with the error transfer formula and the uncertainty of various factors. An in-depth analysis of the improvement effect of UHPC reinforcement on structural reliability and the improvement of reliability after reinforcement compared with ordinary concrete was conducted. The influence of reinforcement thickness and reinforcement was also considered. The results show that UHPC reinforcement can greatly improve the reliability of the structure. Compared with ordinary concrete reinforcement, the reliability performance is also significantly improved. In a certain range, the thickness of the reinforced layer has a positive correlation with the reliability index, and adding appropriate reinforcement to the UHPC layer can effectively improve the reliability index.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.013

First Page

72

Last Page

77

Submission Date

March 2025

Reference

[1] 谌润水，胡钊芳，帅长斌.. 公路旧桥加固技术与实例[M]. 北京: 人民交通出版社, 2002. CHEN Runshui. Strengthening technology and examples of old highway bridges[M]. Beijing: China Communications Press, 2002. [2] 张雷顺, 韩菊红, 郭进军, 等. 新老混凝土粘结补强在某钢筋混凝土桥面板加固整修中的应用[J]. 土木工程学报, 2003, 36(4): 82-85. ZHANG Leishun, HAN Juhong, GUO Jinjun, et al. Application of bond between new and old concrete to strengthen rc bridge-deck[J]. China Civil Engineering Journal, 2003, 36(4): 82-85. [3] DE LARRARD F, SEDRAN T. Optimization of ultra-high-performance concrete by the use of a packing model[J]. Cement and Concrete Research, 1994, 24(6): 997-1009. [4] RICHARD,P，CHEYREZY,M.H. Reactive powder concretes with high ductility and 200 - 800 mpa compressive strength[C]//\"SP-144: Concrete Technology: Past, Present, and Future\". American Concrete Institute, 1994. [5] 张云升, 张文华, 刘建忠. 超高性能水泥基复合材料[M]. 北京: 科学出版社, 2014. ZHANG Yunsheng, ZHANG Wenhua, LIU Jianzhong. Ultra-high performance cementitious composites[M]. Beijing: Science Press, 2014. [6] BRÜHWILER E, DENARIÉ E. Rehabilitation and strengthening of concrete structures using ultra-high performance fibre reinforced concrete[J]. Structural Engineering International, 2013, 23(4): 450-457. [7] TAYEH B A, ABU BAKAR B H, MEGAT JOHARI M A, et al. Mechanical and permeability properties of the interface between normal concrete substrate and ultra high performance fiber concrete overlay[J]. Construction and Building Materials, 2012, 36: 538-548. [8] 史才军, 肖江帆, 曹张, 等. 材料组成对UHPC性能的影响[J]. 硅酸盐通报, 2013, 32(6): 1005-1011. SHI Caijun, XIAO Jiangfan, CAO Zhang, et al. Effects of UHPC constituents on its properties[J]. Bulletin of the Chinese Ceramic Society, 2013, 32(6): 1005-1011. [9] 于涛涛.钢筋活性粉末混凝土受弯构件正截面承载力的研究[D].北京：北京交通大学，2012. Yu Taotao. Research on the Flexural Bearing Capacity of the Cross-Section of Reinforced Reactive Powder Concrete Members [D]. Beijing: Beijing Jiaotong University, 2012. [10] 曹霞, 常婧, 王艳俊. 高强钢筋RPC梁受弯构件正截面承载力试验研究[J]. 河南理工大学学报(自然科学版), 2015, 34(1): 109-115,123. CAO Xia, CHANG Jing, WANG Yanjun. Experimental study on flexural capacity of normal section of high strength reinforced reactive powder concrete beam[J]. Journal of Henan Polytechnic University (Natural Science), 2015, 34(1): 109-115,123. [万方] [11] 张彭成,康青,沈志强,等.钢纤维与碳纤维混合增强活性粉末混凝土力学性能实验研究[C]//中国仪器仪表学会仪表材料分会,重庆仪表材料研究所,中南大学,《功能材料》期刊社.第七届中国功能材料及其应用学术会议论文集（第5分册）.国家仪表功能材料工程技术研究中心,2010. ZHANG Pengcheng,KANG Qing,SHEN Zhiqiang,et al. Experimental Study on Mechanical Properties of Activated Powder Concrete Reinforced by Steel Fibre and Carbon Fibre Hybrid[C]//Instrumentation Materials Branch of China Instrument Society, Chongqing Institute of Instrumentation Materials, Central South University, Journal of Functional Materials. Proceedings of the Seventh Chinese Academic Conference on Functional Materials and Their Applications (Volume 5). National Instrumentation Functional Materials Engineering Technology Research Centre, 2010. [12] 中交公路规划设计院有限公司. 公路钢筋混凝土及预应力混凝土桥涵设计规范: JTG 3362—2018[S]. 北京: 人民交通出版社, 2018. CCCC HIGHWAY CONSULTANTS CO., LTD .Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts: JTG 3362—2018[S]. Beijing: China Communications Press, 2018. [13] TANARSLAN H M. Flexural strengthening of RC beams with prefabricated ultra high performance fibre reinforced concrete laminates[J]. Engineering Structures, 2017, 151: 337-348. [14] YIN H, TEO W, SHIRAI K. Experimental investigation on the behaviour of reinforced concrete slabs strengthened with ultra-high performance concrete[J]. Construction and Building Materials, 2017, 155: 463-474. [15] LAMPROPOULOS A P, PASCHALIS S A, TSIOULOU O T, et al. Strengthening of reinforced concrete beams using ultra high performance fibre reinforced concrete (UHPFRC)[J]. Engineering Structures, 2016, 106: 370-384. [16] PREM P R, MURTHY A R. Acoustic emission and flexural behaviour of RC beams strengthened with UHPC overlay[J]. Construction and Building Materials, 2016, 123: 481-492. [17] 贡金鑫, 魏巍巍. 工程结构可靠性设计原理[M]. 北京: 机械工业出版社, 2007. GONG Jinxin, WEI Weiwei. Reliability design principle of engineering structure[M]. Beijing: China Machine Press, 2007.

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