钢筋布设对GFRP-混凝土组合板弯曲性能影响的研究

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (6): 51-56.

钢筋布设对GFRP-混凝土组合板弯曲性能影响的研究

佟兆杰¹, 陈宜言¹, 黄侨², 许翔²

1.深圳市市政设计研究院有限公司,深圳518029;
2.东南大学交通学院,南京211189

收稿日期:2019-11-05 出版日期:2020-06-28 发布日期:2020-06-28
作者简介:佟兆杰(1988-),男,博士,博士后,主要从事新型桥梁组合结构方面的研究,zongshi2006@163.com。
基金资助:
中国博士后科学基金资助项目(2019M653085);中国交通建设股份有限公司资助项目(271400140114)

STUDY ON THE INFLUENCE OF REINFORCEMENT ARRANGEMENT ON THE FLEXURAL PERFORMANCE OF GFRP-CONCRETE COMPOSITE DECKS

TONG Zhao-jie¹, CHEN Yi-yan¹, HUANG Qiao², XU Xiang²

1. Shenzhen Municipal Design & Research Institute Co. , Ltd. , Shenzhen 518029, China;
2. School of Transportation, Southeast University, Nanjing 211189, China

Received:2019-11-05 Online:2020-06-28 Published:2020-06-28

摘要/Abstract

摘要： 钢筋的布设可以提高GFRP-混凝土组合桥面板的弯曲刚度,改善组合板的延性,降低组合板的造价。此外,配筋组合板具有优于钢筋混凝土板的耐久性。本文基于截面分析法对配筋组合板的弯曲性能进行研究。首先基于平截面假定推导配筋组合板的截面分析模型,并通过2片试验板进行验证。然后采用截面分析法对钢筋布设与组合板刚度及延性的关系进行分析。分析表明:钢筋面积、GFRP底板厚度都可以提高组合板的弯曲刚度;钢筋面积越大组合板延性越差,GFRP底板越厚组合板延性越差;可以通过增加钢筋面积、减少GFRP底板厚度的方法提高组合板的刚度,并使组合板具有一定延性;当钢筋面积和GFRP板尺寸不变时,可以使钢筋尽量靠近桥面板底面布置,从而获得较好的弯曲刚度及延性。

关键词: 桥梁, GFRP-混凝土, 截面分析法, 钢筋, 弯曲刚度, 延性

Abstract: The steel bars could increase the flexural stiffness of GFRP-concrete composite bridge decks, improve its ductility and reduce the cost. Moreover, the durability of composite decks with steel bars was better than that of reinforced concrete decks. The flexural performance of composite decks was investigated based on the sectional analysis method. Firstly, the analysis model of composite decks with steel bars was established based on the plane section assumption, and verified through experimental tests of two test decks. Then, the relationship between flexural stiffness, ductility and reinforcement arrangement was studied using the sectional analysis method. The analysis indicates that the area of steel bars and the thickness of GFRP bottom plates could increase the flexural stiffness of composite decks. A larger area of steel bars results in a lower ductility, and a thicker GFRP bottom plate result in a lower ductility. The method of increasing reinforcement area and reducing GFRP bottom plate thickness could improve the flexural stiffness and the ductility. When the size of GFRP plate and the reinforcement area are constant, the steel bar could be placed as close as possible to the bottom surface of bridge decks to obtain better flexural stiffness and ductility.

Key words: bridge, GFRP-concrete, sectional analysis method, steel bar, flexural stiffness, ductility

中图分类号:

TB332

佟兆杰, 陈宜言, 黄侨, 许翔. 钢筋布设对GFRP-混凝土组合板弯曲性能影响的研究[J]. 复合材料科学与工程, 2020, 0(6): 51-56.

TONG Zhao-jie, CHEN Yi-yan, HUANG Qiao, XU Xiang. STUDY ON THE INFLUENCE OF REINFORCEMENT ARRANGEMENT ON THE FLEXURAL PERFORMANCE OF GFRP-CONCRETE COMPOSITE DECKS[J]. Composites Science and Engineering, 2020, 0(6): 51-56.

参考文献

[1] 佟兆杰, 黄侨, 鲍卫刚, 等. GFRP-混凝土组合连续板的静力性能试验研究[J]. 华南理工大学学报(自然科学版), 2017, 45(11): 31-40.
[2] He J, Liu Y Q, Chen A, et al. Experimental investigation of movable hybrid GFRP and concrete bridge deck[J]. Construction and Building Materials, 2012, 26(1): 49-64.
[3] Fam A, Nelson M. New bridge deck cast onto corrugated GFRP stay-in-place structural forms with interlocking connections[J]. Journal of Composites for Construction, 2012, 16(1): 110-117.
[4] 佟兆杰, 黄侨, 高达文, 等. 不同连接程度GFRP-混凝土桥面板力学性能试验研究[J]. 湖南大学学报(自然科学版), 2019, 46(5): 21-29.
[5] Dieter D A, Dietsche J S, Bank L C, et al. Concrete bridge decks constructed with fiber-reinforced polymer stay-in-place forms and grid reinforcing[J]. Transportation Research Record, 2002, 1814(1): 219-226.
[6] 郭诗惠, 蔡春声, 张建仁, 等. 界面优化下的GFRP-混凝土组合桥面板静力性能试验研究[J]. 湖南大学学报(自然科学版), 2017, 44(3): 19-27.
[7] Cho K, Park S Y, Kim S T, et al. Behavioral characteristics of precast FRP-concrete composite deck subjected to combined axial and flexural loads[J]. Composites Part B: Engineering, 2013, 44(1): 679-685.
[8] Cheng L. Flexural fatigue analysis of a CFRP form reinforced concrete bridge deck[J]. Composite Structures, 2011, 93(11): 2895-2902.
[9] Goyal R, Mukherjee A, Goyal S. An investigation on bond between FRP stay-in-place formwork and concrete[J]. Construction and Building Materials, 2016, 113: 741-751.
[10] Tong Z J, Song X D, Huang Q. Deflection calculation method on GFRP-concrete-steel composite beam[J]. Steel and Composite Structures, 2018, 26(5): 595-606.
[11] 黄辉, 王文炜, 戴建国. 双跨连续GFRP-混凝土组合板的试验研究[J]. 东南大学学报(自然科学版), 2015, 45(1): 139-144.
[12] Zuo Y, Liu Y, He J. Experimental investigation on hybrid GFRP-concrete decks with T-shaped perforated ribs subjected to negative moment[J]. Construction and Building Materials, 2018, 158: 728-741.
[13] 中华人民共和国住房和城乡建设部. 混凝土结构设计规范: GB 50010-2010[S]. 北京: 中国建筑工业出版社, 2015.
[14] Hall J E, Mottram J T. Combined FRP reinforcement and permanent formwork for concrete members[J]. Journal of Composites for Construction, 1998, 2(2): 78-86.
[15] Nelson M, Fam A. Modeling of flexural behavior and punching shear of concrete bridge decks with FRP stay-in-place forms using the theory of plates[J]. Journal of Engineering Mechanics, 2014, 140(12): 04014095.