圆钢管再生混凝土构件抗侧向冲击性能试验  

Tests on Circular Recycled Aggregate Concrete-filled Steel Tubular Members Under Lateral Impact Loads

作　　者：杨有福[1] 张智成[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《中国公路学报》2014年第11期31-38,共8页China Journal of Highway and Transport

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)

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。In order to provide reference for design and construction of concrete-filled steel tubular（CFST）arch bridges,aimed at recycled aggregate concrete-filled steel tube（RACFST）which could be adopted in CFST arch bridges,with the influences of recycled coarse aggregate replacement ratio,height of the drop-weight and axial compressive force considered,test on circular RACFST members under lateral impact loads was carried out,and the fixed boundary condition at both ends was adopted.The influences of recycled coarse aggregate replacement ratio,dimensionless initial kinetic energy and axial compression ratio on the lateral impact resistant behavior of circular RACFST members were investigated,and the performances of RACFST members were compared with that of CFST counterparts.The results show that circular RACFST members have good performances under lateral impact loads.The final shape of the specimen appears ＂V＂shape and the residual displacement at the mid-span increases significantly with the increase of dimensionless initial kinetic energy.

关 键 词：桥梁工程 钢管再生混凝土 试验研究 冲击荷载 时程曲线 残余位移 抗冲击承载力 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]