钢-高强有机聚合物纤维混凝土组合连续梁力学性能试验研究

发布时间：2018-06-19 23:21

本文选题：钢-混组合连续梁 + 有机聚合物纤维混凝土　；参考：《武汉理工大学学报》2016年06期

【摘要】：针对钢-混组合连续梁桥负弯矩区易开裂难题,采用高抗裂的高强有机聚合物纤维混凝土代替普通混凝土,在跨中对称荷载作用下,试验研究钢-高强有机聚合物纤维混凝土组合连续梁的力学性能,探明高强有机聚合物纤维及其掺量对组合梁抗裂性能的影响作用。结果表明,高强有机聚合物纤维对钢-混组合梁抗裂性能和结构延性的提升影响较大,对承载能力的影响较为有限;高强有机聚合物纤维掺量增高,结构抗裂性能提升,开裂弯矩增大,裂缝发展受到抑制;通过荷载-纤维掺量关系曲线,获得了高强有机聚合物纤维的最佳掺量取值4kg/m3。研究成果为高强有机聚合物纤维混凝土在钢-混组合连续梁桥中的应用提供了技术支撑。
[Abstract]:In order to solve the problem of cracking in the negative moment region of steel-concrete composite continuous beam bridge, high strength organic polymer fiber reinforced concrete with high crack resistance is used instead of ordinary concrete, and under the action of mid-span symmetry load, the concrete is replaced by high strength organic polymer fiber reinforced concrete. The mechanical properties of steel-high strength organic polymer fiber reinforced concrete composite continuous beams were studied and the effects of high strength organic polymer fibers and their contents on the crack resistance of composite beams were investigated. The results show that high strength organic polymer fiber has a great influence on crack resistance and ductility of steel-mixed composite beam, but has a limited effect on bearing capacity, and the content of high strength organic polymer fiber is increased, and the crack resistance of structure is improved. The crack development is restrained with the increase of cracking moment, and the optimum content of high strength organic polymer fiber is obtained by the curve of load-fiber content relationship, which is 4 kg / m ~ (3). The research results provide technical support for the application of high strength organic polymer fiber reinforced concrete in steel-concrete composite continuous beam bridge.
【作者单位】：武汉理工大学道路桥梁与结构工程湖北省重点实验室;
【基金】：国家自然科学基金(51378405) 湖北省科技支撑计划(2015BAA092) 中国工程院重点咨询研究项目(2016-XZ-13)
【分类号】：U441

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