Longitudinal Joint Performance of a Concrete Hollow Core Slab Bridge
Longitudinal Joint Performance of a Concrete Hollow Core Slab Bridge
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DOI：
10.1177/0361198118781653
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发表时间：
2018-12-01
影响因子：
1.7
通讯作者：
Tarantino, Angelo Marcello
中科院分区：
文献类型：
--
作者：
Barbieri, Diego Maria;Chen, Yuechi;Tarantino, Angelo Marcello
空心板桥梁的建造方法是将预制或预应力箱梁相邻放置，在板之间的小纵向空间（铰链接头）灌浆，并浇筑钢筋混凝土桥面。铰缝处出现的纵向裂缝导致桥面过早损坏。本文对一座三梁现浇空心板桥进行了理论和试验研究。根据中国规范规格制作了一个真实尺寸的标本。通过施加标准车辆荷载，研究了纵缝的性能。试验未发现任何纵向裂纹。根据实验数据建立了有限元模型。有限元参数分析揭示了有关以下输入的一些实际设计指标：桥面板厚度、混凝土强度和铰接钢筋。此外，这些分析表明，C形和X形箍筋并没有起到积极的作用，防止节点纵向裂缝。这项研究证实了设计方法的可靠性，至少在静态载荷下，而需要进一步的研究，以调查周期性载荷和不同的温度对梁的上表面和下表面的影响。
Hollow core slab bridges are constructed by placing prefabricated or prestressed box beams adjacent to each other, grouting the small longitudinal space (hinge-joint) between the slabs and casting a reinforced concrete deck. The longitudinal cracking appearing at hinge-joint locations leads to a premature deterioration of the deck. This paper presents a theoretical and experimental study of a hollow core slab bridge composed of three beams and a cast-in-place deck. A real-size specimen was built according to Chinese code specifications. The behavior of the longitudinal joints was investigated by applying the standard vehicle load. The tests do not highlight any longitudinal cracks. A finite element model was created from the experimental data. A finite element parametric analysis revealed some practical design indications regarding the following inputs: deck thickness, concrete strength, and hinge-joint steel bars. Furthermore, these analyses testify that C-shape and X-shape stirrups do not play an active role in preventing the joint longitudinal cracks. This research confirms the reliability of the design method, at least for static loads, while further studies are needed to investigate the effect of both periodical loadings and different temperatures on upper and lower surfaces of the beams.