高强聚氨酯复合材料加固混凝土梁抗弯性能研究

徐传昶; 马乃轩; 朱经纬; 王越; 吴宇峰

doi:10.3724/j.gyjzG23062506

高强聚氨酯复合材料加固混凝土梁抗弯性能研究

doi: 10.3724/j.gyjzG23062506

徐传昶^1,3,
马乃轩^1,3,
朱经纬^2, ,,
王越^1,3,
吴宇峰²

1. 山东高速工程检测有限公司, 济南 250002;
2. 山东建筑大学交通工程学院, 济南 250101;
3. 桥梁结构大数据与性能诊治提升交通运输行业重点实验室, 济南 250002

基金项目:

国家自然科学基金项目（51908337）；山东省交通科技项目（2019B41）。

详细信息

作者简介:
徐传昶，硕士，高级工程师，主要从事新材料新结构桥梁的研究， 604398650@qq.com。

通讯作者:
朱经纬，博士，副教授，主要从事新材料新结构桥梁的研究， zhujingweicadx@126.com。

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出版历程
- 收稿日期: 2023-06-25
- 网络出版日期: 2024-05-29

Research on Flexural Performance of Reinforced Concrete Beams Strengthened with High-Strength Polyurethane Composites

XU Chuanchang^1,3,
MA Naixuan^1,3,
ZHU Jingwei^{2
, ,},
WANG Yue^1,3,
WU Yufeng²

1. Shandong Expressway Engineering Testing Co., Ltd., Jinan 250002, China;
2. Transportation Engineering School, Shandong Jianzhu University, Jinan 250101, China;
3. Key Laboratory of Big Data and Performance Diagnosis and Treatment of Transportation Industry, Jinan 250002, China

摘要

摘要: 为研究高强聚氨酯复合材料（HSPUC）加固混凝土梁抗弯性能，开展了2根采用不同梁底加固范围的HSPUC加固混凝土梁和1根对比混凝土梁的静力破坏试验，分析了试验梁破坏形态、承载能力、裂缝特征、变形及应变发展规律和界面滑移性能。采用ABAQUS有限元软件建立了HSPUC加固混凝土梁抗弯性能精细化数值模型，分析了加固层抗折强度和加固层厚度对抗弯性能影响。研究结果表明：采用梁底非通长HSPUC加固试验梁和采用梁底通长HSPUC加固试验梁分别发生了加固端保护层剥离破坏和塑性弯曲破坏，极限承载力较未加固试验梁分别提高了30.4%、79.4%； HSPUC加固法充分发挥了HSPUC材料的高强力学性能，延缓了裂缝的发展，有效抑制了混凝土梁因裂缝扩展而引起的刚度下降，对混凝土梁抗弯刚度和极限承载力的提高作用显著；各加固梁试验过程中HSPUC层与混凝土梁间具有可靠的黏结强度和良好的协同工作性能；数值模型计算荷载–跨中挠度曲线与试验曲线吻合良好，可用于HSPUC加固混凝土梁受弯全过程计算分析。
- 高强聚氨酯复合材料 /
- 混凝土梁加固 /
- 抗弯性能 /
- 剥离破坏 /
- 数值模拟
Abstract: In order to study the flexural performance of reinforced concrete beams strengthened with high-strength polyurethane composites (HSPUC), the static failure tests of two reinforced concrete beams strengthened by HSPUC reinforcement layer with different strengthening areas at the bottom of the beams and one comparative reinforced concrete beam were carried out, and the failure modes, bearing capacity, crack characteristics, deformation and strain development laws, and interface slip of the test beams were investigated. A refined numerical model was constructed through the finite element program ABAQUS to simulate the flexural performance of reinforced concrete beams strengthened with HSPUC, and the effects of flexural strength and thickness of reinforcement layer on the flexural performance were analyzed. The results showed that the test beams strengthened by HSPUC in non-full length range and full length range of the bottom of the beam experienced debonding failure of the protective layer at the beam end and plastic flexural failure, respectively. Their ultimate bearing capacity increased by 30.4% and 79.4% compared to the unreinforced test beam, respectively. The HSPUC reinforcement method made full use of the high-strength mechanical properties of HSPUC, which could delay the occurrence and development of cracks and therefore effectively inhibit the stiffness decrease caused by crack propagation, significantly improving the flexural stiffness and ultimate bearing capacity of reinforced concrete beams. The reliable bonding strength and good cooperative working performance between the HSPUS layer and the reinforced concrete beam were observed. The mid-span load-deflection curves calculated by the numerical model were in good agreement with the experimental curves, so the numerical model can be used to calculate and analyze the entire flexural process of reinforced concrete beams strengthened with HSPUC.
- high-strength polyurethane composites /
- concrete beam reinforcement /
- flexural performance /
- debonding failure /
- numerical simulation

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参考文献(22)

[1]	周永洪. MPC复合材料快速加固铁路桥梁的基础研究[J].公路, 2017, 62(6):271-275.
[2]	SADOWSKI L, HOLA J, ZAK S, et al. Microstructural and mechanical assessment of the causes of failure of floors made of polyurethane-cement composites[J]. Composite Structures, 2020, 238:1-9.
[3]	HUSSAIN H K, LIU G W, YONG Y W. Experimental study to investigate mechanical properties of new material polyurethanecement composite (PUC)[J]. Construction and Building Materials, 2014, 50:200-208.
[4]	ZHANG K X, SUN Q S. Experimental study of reinforced concrete T-beams strengthened with a composite of prestressed steel wire ropes embedded in polyurethane cement (PSWR-PUC)[J]. International Journal of Civil Engineering, 2018, 16(9):1109-1123.
[5]	郭建才,张彦群,陈炳均,等.基于MPC复合材料进行钢筋混凝土实心板梁桥加固[J].公路, 2017, 62(3):126-130.
[6]	曾令宏,尚守平,万剑平,等.复合砂浆钢筋网加固桥梁构件试验研究[J].工业建筑, 2009, 39(2):118-122.
[7]	HUSSAIN H K, ZHANG L Z, LIU G W. An experimental study on strengthening reinforced concrete T-beams using new material poly-urethane-cement (PUC)[J]. Construction and Building Materials, 2013, 40:104-117.
[8]	王剑琳,刘贵位,叶李水.利用MPC复合材料进行空心板梁桥加固的应用技术研究[J].公路, 2013, 58(8):39-43.
[9]	杨永清,严猛,李晓斌,等.聚合物改性混凝土加固空心板桥荷载横向分布理论及试验研究[J].桥梁建设, 2014, 44(6):63-68.
[10]	ZHANG K X, SUN Q S. The use of wire mesh-polyurethane cement (WM-PUC) composite to strengthen RC T-beams under flexure[J]. Journal of Building Engineering, 2018, 15:122-136.
[11]	GAO H S, SUN Q S. Study on fatigue test and life prediction of polyurethane cement composite (PUC) under high or low temperature conditions[J/OL]. Advances in Materials Science and Engineering, 2020[2023-01-01]. https://doi.org/10.1155/2020/2398064.
[12]	谢富春,胡治元,余东升,等.聚醚型聚氨酯弹性体的合成[J].化学推进剂与高分子材料, 2007, 5(1):46-49.
[13]	张可心,孙全胜.高韧性高强聚氨酯复合材料力学性能研究[J].新型建筑材料, 2018, 45(1):126-128.
[14]	高峰. MPC复合材料加固空心板梁桥的试验研究[D].哈尔滨:哈尔滨工业大学, 2016:10-15.
[15]	张盛然.聚氨酯水泥钢丝绳复合加固桥梁试验及有限元数值分析[D].哈尔滨:东北林业大学, 2018:26-31.
[16]	刘欢. MPC复合材料抗弯加固RC梁的试验与理论研究[D].哈尔滨:哈尔滨工业大学, 2016:7-8.
[17]	刘锦成,徐传昶,姜侃,等.超高韧性聚氨酯复合材料性能影响因素[J].工程塑料应用, 2021, 49(4):104-108.
[18]	中华人民共和国住房和城乡建设部.混凝土物理力学性能试验方法标准:GB/T 50081-2019[S].北京:中国建筑工业出版社, 2019.
[19]	卜良桃.高性能复合砂浆钢筋网(HPF)加固混凝土结构新技术[M].北京:中国建筑工业出版社, 2007:112-133.
[20]	LUBLINER J, OLIVER J, OLLER S, et al. A plastic-damage model for concrete[J]. International Journal of Solids and Structures, 1989, 25(3):299-326.
[21]	LEE J, FENVES G L. Plastic-damage model for cyclic loading of concrete structures[J]. Journal of Engineering Mechanics, 1998, 124(8):892-900.
[22]	过镇海,张秀琴,张达成.混凝土应力-应变全曲线的试验研究[J].建筑结构学报, 1982(1):1-12.