圆形钢管地聚合物再生混凝土短柱轴压力学性能试验研究  

Experimental Research on Axial Compression Performance of Circular Steel Tubular Stub Columns Filled with Geopolymer Recycled Concrete

作　　者：陈宇峰 林镇源 廖飞宇 林志平 张伟杰 陈志刚 CHEN Yufeng;LIN Zhenyuan;LIAO Feiyu;LIN Zhiping;ZHANG Weijie;CHEN Zhigang(Fujian Construction Engineering Group Co.,Ltd.,Fuzhou 350003,China;College of Transportationand Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,China;Fujian Expressway Group Co.,Ltd.,Fuzhou 350001,China)

机构地区：[1]福建建工集团有限责任公司,福州350003 [2]福建农林大学交通与土木工程学院,福州350108 [3]福建省高速公路集团有限公司,福州350001

出　　处：《建筑钢结构进展》2022年第8期61-69,共9页Progress in Steel Building Structures

基　　金：国家自然科学基金(51878176);福建省科技厅社会发展引导性项目(2019Y0049)。

摘　　要：以再生骨料取代率为主要参数,完成了6根圆形钢管地聚合物再生混凝土短柱和2根圆形钢管地聚合物普通混凝土短柱在轴压作用下的试验研究。基于试验结果,考察了试件的破坏模式、荷载-变形关系曲线、极限承载力、延性等,结果表明:圆形钢管地聚合物再生混凝土和普通钢管混凝土的破坏模式无明显差异。与钢管混凝土试件相比,圆形钢管地聚合物再生混凝土的荷载-变形关系曲线下降段更为平缓。随着再生骨料取代率的增大,试件极限承载力随之降低,而延性有提高的趋势。最后,采用现有规范提供的普通钢管混凝土设计公式对试验实测的极限承载力进行计算比较,结果表明现有规范的计算结果均偏于安全。Using the replacement ratio of recycled coarse aggregate as the primary parameter,an experiment is performed on 6 circular steel tubular stub columns filled with geopolymer recycled concrete and 2 reference specimens filled with conventional concrete under axial compressive stress.On the basis of the test findings,the failure modes,load-deformation relationship curves,load bearing capacity,and ductility of the specimens are analysed.The test results indicate that there is no noticeable difference in the failure mode of composite columns filled with geopolymer recycled concrete or regular concrete.However,the descending stage of the load-deformation curve of the specimen with geopolymer recycled aggregate concrete is relatively more gradual than that of the specimen with natural aggregate.As the replacement ratio rises,the ultimate bearing capacity of the specimen declines,but its ductility tends to increase.The ultimate strengths of concrete-filled steel tubes predicted by current codes are compared with the measured ultimate strengths,and the findings indicate that the code predictions are often conservative.

关 键 词：地聚合物再生混凝土 再生骨料 钢管混凝土 短柱 承载力 延性 

分 类 号：TU398.9[建筑科学—结构工程]