圆钢管再生混凝土构件抗侧向冲击性能试验

发布时间：2018-11-26 10:17

【摘要】：为了给钢管混凝土拱桥的设计与施工提供参考,针对钢管混凝土拱桥中可以采用的钢管再生混凝土,考虑再生混凝土粗骨料取代率、落锤高度和轴压荷载等因素的影响,进行了侧向冲击荷载作用下两端嵌固圆钢管再生混凝土构件的试验研究。考察了再生混凝土粗骨料取代率、量纲一的初始动能和轴压比对圆钢管再生混凝土构件抗侧向冲击性能的影响,并比较其与圆钢管普通混凝土构件的差异。研究结果表明:侧向冲击荷载作用下圆钢管再生混凝土构件具有较好的力学性能;试件的最终形状呈"V"字形,且跨中残余位移随量纲一的初始动能的增加而显著增大。
[Abstract]:In order to provide reference for the design and construction of concrete-filled steel tube (CFST) arch bridge, considering the influence of the ratio of coarse aggregate replacement of recycled concrete, the height of drop weight and axial compression load, etc. The experimental study of recycled concrete members with circular steel tube embedded at both ends under lateral impact load was carried out. The effects of the ratio of coarse aggregate substitution of recycled concrete, the initial kinetic energy of dimension one and the axial compression ratio on lateral impact resistance of recycled concrete filled steel tubular members were investigated, and the differences between them and those of ordinary concrete filled circular steel tube members were compared. The results show that the recycled concrete-filled circular steel tube members have better mechanical properties under lateral impact loading, and the final shape of the specimen is "V" shape, and the residual displacement in the span increases significantly with the increase of initial kinetic energy of dimension one.
【作者单位】：大连理工大学海岸和近海工程国家重点实验室;
【基金】：国家自然科学基金项目(51121005) 辽宁省自然科学基金项目(2013020125) 中央高校基本科研业务费专项资金项目(DUT12ZD215)
【分类号】：U446;U448.33

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