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

Abstract

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

CLC Number:

TB332

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.

References

[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.