压型钢板-混凝土组合桥面板极限承载力试验

doi:10.13229/j.cnki.jdxbgxb.20221556

摘要/Abstract

摘要：

本文提出了一种适用于中小跨径钢板梁桥的压型钢板-混凝土组合板桥面板结构，对2块压型钢板-混凝土组合桥面板试件进行了两跨跨中对称加载试验，考察了连续组合桥面板的跨中挠度、混凝土和钢筋应变、负弯矩区混凝土裂缝的分布范围和裂缝宽度，得到了组合桥面板的破坏形态与极限承载力。组合桥面板试件长9.25 m，宽1.5 m，压型钢板厚3 mm，混凝土板厚24 cm，两试件除PBL连接件布置位置不同（压型钢板的波峰或波谷）外，其余构造、尺寸相同。试验结果表明：组合桥面板试件的极限承载力分别为1 128.5 kN与1 095.7 kN，破坏形态均为弯曲破坏；PBL连接件布置在压型钢板波峰位置可使组合桥面板具有更大的抗弯刚度；组合桥面板的支点位置存在较大范围的负弯矩区，裂缝的分布范围约为2倍顶板宽度，在设计时应引起注意；按塑性理论计算连续组合桥面板的极限承载力与试验结果吻合较好。

关键词: 桥梁工程, 组合桥面板, 压型钢板, 极限承载力, 试验研究

Abstract:

A profiled steel sheeting-concrete composite bridge deck for medium- and small-span steel plate girder bridges was proposed. Two continuous deck specimens were fabricated and tested to study the failure mode and load capacities subjected to symmetrical load at two mid-span. The mid-span deflection， the strain of concrete and reinforcement， and the distribution of cracks and crack widths at the hogging moment region were obtained and discussed. The two slab specimens are identical except for the position of perfobond connectors： 9.25 m long and 1.5 m wide， the thickness of the profiled steel sheeting is 3 mm， and the depth of concrete is 24 cm. The test results showed that the failure mode of the specimens was flexure； the load capacities of two specimens were 1 128.5 kN and 1 095.7 kN， respectively； the composite slab with perfobond connectors arranged in the crest had greater bending stiffness； the distribution range of concrete cracks due to the hogging moment is about twice the width of up flange of the girder， which should be paid attention to in design. The load capacities of the continuous composite bridge deck calculated by the plastic theory fit well with the experimental results.

Key words: bridge engineering, composite bridge deck, profile steel sheeting, bearing capacity, experimental studies

中图分类号:

TU398

张协力,吴冲,苏庆田. 压型钢板-混凝土组合桥面板极限承载力试验[J]. 吉林大学学报(工学版), 2024, 54(10): 2870-2883.

Xie-li ZHANG,Chong WU,Qing-tian SU. Experiment on load capacity of profiled steel sheeting-concrete composite bridge decks[J]. Journal of Jilin University(Engineering and Technology Edition), 2024, 54(10): 2870-2883.

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材料	板厚（或直径） /mm	屈服强度 /MPa	极限强度 /MPa
Q345钢板	3	366.0	538.6
Q345钢板	6	477.1	548.1
HRB400钢筋	16	442.4	632.0
HRB400钢筋	20	424.4	617.1

试件	荷载等级/kN
试件	90	120	150	180	210	240	270	300	400
SCCP-1	0.08	0.17	0.20	0.25	0.28	0.30	0.34	0.36	0.44
SCCP-2	0.03	0.05	0.07	0.09	0.10	0.16	0.20	0.22	0.26