结合压缩薄膜效应对BFRP筋自密实混凝土桥面板工作性能有限元分析

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (5): 12-18.

结合压缩薄膜效应对BFRP筋自密实混凝土桥面板工作性能有限元分析

周玲珠^1,2, 郑愚^1*, Susan.E.Taylor³, 罗远彬⁴

1.东莞理工学院,东莞523808;
2.华南理工大学,广州510640;
3.英国贝尔法斯特女王大学,北爱尔兰贝尔法斯特BT7 1NN;
4.哈尔滨工业大学(深圳),深圳518055

收稿日期:2017-11-20 出版日期:2018-05-20 发布日期:2018-05-20
通讯作者: 郑愚(1978-),男,教授,博士,主要从事结构耐久性、结构数值模拟、复合材料方面的研究,zhengy@dgut.edu.cn。
作者简介:周玲珠(1992-),女,硕士研究生,主要从事FRP复合材料方面的研究。
基金资助:
国家自然科学基金(51678149);2015广东省普通高校国际暨港澳台合作创新平台及国际合作重大项目(自然科学)-特色创新项目(2015KTSCX141);广东省科技计划-公益研究与能力建设方向(2016A010103045)

NONLINEAR FINITE ELEMENT ANALYSIS OF THE STRUCTURAL BEHAVIOR OFBFRP REINFORCED SELF-COMPACTING CONCRETE BRIDGE SLAB WITH CONSIDERATION OFCOMPRESSIVE MEMBRANE ACTION

ZHOU Ling-zhu^1,2, ZHENG Yu^1*, Susan. E. TAYLOR³, LUO Yuan-bin⁴

1.Dongguan University of Technology, Dongguan 523808, China;
2.South China University of Technology,Guangzhou 510640, China;
3.Queen′s University of Belfast, Northern Ireland BT7 1NN, Britain;
4.Harbin Institute of Technology (Shenzhen), Shenzhen518055, China

Received:2017-11-20 Online:2018-05-20 Published:2018-05-20

摘要/Abstract

摘要： 采用非线性有限元方法对英国北爱尔兰Thompson桥中的BFRP筋增强自密实混凝土桥面板进行数值分析,通过对比数值模拟结果和试验结果表明所建立的有限元模型能够较准确地反映BFRP筋增强自密实混凝土桥面板在轮压负载下的工作性能。基于有限元模型的有效性,采用非线性数值模拟对该新型桥面板进行极限承载力和破坏模式进行预测及参数化分析。结果表明,BFRP筋自密实桥面板极限承载力大约为欧洲轮压负载150 kN的6倍(100 t),由于现行桥面板设计规范忽略了压缩薄膜效应的存在而导致桥面板极限承载力设计过于保守,参数化分析发现配筋率和筋材类型对桥面板极限承载力影响不大,而混凝土强度和跨高比是影响桥面板极限承载力的主要因素。

关键词: 非线性有限元法, BFRP筋增强自密实桥面板, 压缩薄膜效应, 承载性能

Abstract: In this paper, the nonlinear finite element method is adopted to investigate the behavior of self-compacting concrete bridge deck slabs reinforced with basalt fibre reinforced polymer (BFRP) rebar in a real bridge named as Thompson′s bridge in Northern Ireland. By comparing the results from the test and the finite element analysis, it is found that the proposed numerical model shows good agreement with the results from the field test. Based on the accurate validation with the test results, the loading-carrying capacity of self-compacting bridge decks reinforced with BFRP bars is predicted and a series of parametric study is conducted to evaluate the influence of some structural variables on loading carrying capacity of bridge deck slabs in Thompson′s Bridge. The numerical results indicate that the ultimate bearing capacity of the concrete deck slabs in Thompson Bridgeis about 1000 kN, which is about 6 times of European pressure load of 150 kN. However, the ultimate bearing capacity of bridge deck is highly underestimated by existing bridge deck design guidelines due to the ignorance of the existence of the compression membrane action. The results from parametric study show that the reinforcement ratio and the type of reinforcement have no significant effect on the ultimate bearing capacity of the bridge deck due to the influence of compressive membrane action. On the contrary, the concrete strength and the span to depth ratio have strong effect on the loading-carrying capacity of concrete bridge deck reinforced with BFRP bars.

Key words: nonlinear finite element method, BFRP reinforced self-compacting concrete bridge deck, compression membrane action, loading-carrying capacity

中图分类号:

TB332

周玲珠, 郑愚, Susan.E.Taylor, 罗远彬. 结合压缩薄膜效应对BFRP筋自密实混凝土桥面板工作性能有限元分析[J]. 玻璃钢/复合材料, 2018, 0(5): 12-18.

ZHOU Ling-zhu, ZHENG Yu, Susan. E. TAYLOR, LUO Yuan-bin. NONLINEAR FINITE ELEMENT ANALYSIS OF THE STRUCTURAL BEHAVIOR OFBFRP REINFORCED SELF-COMPACTING CONCRETE BRIDGE SLAB WITH CONSIDERATION OFCOMPRESSIVE MEMBRANE ACTION[J]. Fiber Reinforced Plastics/Composites, 2018, 0(5): 12-18.

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