竹质复合材料工字形梁的抗弯性能试验

发布时间：2018-03-27 19:00

本文选题：桥梁工程　切入点：竹质复合材料　出处：《中国公路学报》2014年04期

【摘要】：为了探索竹质复合材料在桥梁建筑结构方向应用的可能性,对4根竹质复合材料工字形梁的抗弯力学特性进行了初步的四点抗弯模型试验研究,其中一根模型试验梁仅配置体外钢筋而不施加预应力,另一根模型试验梁施加体外预应力,并通过试验得到了模型试验梁的屈服承载力、极限承载能力、腹板与翼缘板的连接方式与结构抗弯刚度之间的相互关系。研究结果表明:该类竹质工字形梁的破坏模式有腹板撕裂破坏和腹板受压区局部屈曲破坏;梁的整体工作性能优良,能够提供较高的承载力和结构刚度,但是其后期结构变形较大,结构延性较好,工字形梁的承载力取决于结构变形量值;另外腹板与翼缘板之间采用螺栓连接和结构胶连接的连接方式也有待于进一步深化研究。
[Abstract]:In order to explore the possibility of the application of bamboo composite material in the direction of bridge building structure, the flexural mechanical properties of four bamboo composite I-shaped beams were studied preliminarily by four-point bending model test. One of the model test beams is equipped with external reinforcement instead of prestressing force, and the other model test beam is subjected to external prestress, and the yield bearing capacity and ultimate bearing capacity of the model test beam are obtained by experiments. The relationship between the connection mode of web and flange plate and the flexural stiffness of the structure. The results show that the failure modes of this kind of bamboo I-shaped beams are web tearing failure and local buckling failure in web compression zone, and the overall working performance of the beam is good. It can provide high bearing capacity and structural stiffness, but its late deformation is larger, the ductility of the structure is better, and the bearing capacity of I-shaped beam depends on the deformation value of the structure. In addition, the connection between web and flange plate by bolt and structural glue also needs to be further studied.
【作者单位】：东南大学交通学院;
【分类号】：U448.212;U446.1

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