东南大学学报（自然科学版）2025，Vol.55Issue(5)：1416-1425,10.DOI:10.3969/j.issn.1001-0505.2025.05.023
方钢管柱装配式槽形外包柱脚抗震性能试验研究
Experimental study on seismic performance of prefabricated slotted encased square steel pipe column bases
摘要
Abstract
To study the seismic performance of prefabricated encased column base,a new type of prefabri-cated slotted interlocking encased column base is proposed,and the low-cycle reciprocating loading tests of three prefabricated and one cast-in-place encased column bases are completed.The results show that compared with the cast-in-place column base with the same structure,the prefabricated column bases can reduce the site casting by 60%;the bearing capacity and initial stiffness are reduced by 8.3%and 13.1%,respectively;the energy dissipation capacity and ductility are increased by 7.1%and 8.1%,respectively.In terms of failure mode,the column base shows bottom section damage of the encased section;cable-stayed cracks and bending cracks exhibit in the middle;and the top concrete is damaged under pressure.The assembly surface cracks of the prefabricated column base can hinder the development of cable-stayed cracks and delay the failure of the prefabricated column base.The stiffening rib at the top of the groove section can partially replace encased con-crete,and improve the ductility and energy dissipation capacity of the prefabricated column base,which are 24.7%and 58.4%higher than those of the cast-in-place column base,respectively.The top hoop plate can in-crease the strength of the prefabricated column base,which is only 0.6%lower than that of the cast-in-place column base,and can reduce the formation of the pressure cracks at the top of the encasing section.The new prefabricated column base can basically meet the bearing capacity requirements in the code,and improve the ductility and energy dissipation capacity of the column base.关键词
装配式/外包柱脚/抗震性能/低周往复加载Key words
prefabricated/encased column base/seismic performance/low-cycle reciprocating loading分类
建筑与水利引用本文复制引用
常鸿飞,朱锶杰,张政,严晓宇,李照伟,夏军武..方钢管柱装配式槽形外包柱脚抗震性能试验研究[J].东南大学学报（自然科学版）,2025,55(5):1416-1425,10.基金项目
国家自然科学基金重点资助项目(U22A20598) （U22A20598）
国家自然科学基金面上资助项目(51978657) （51978657）
中央高校基本业务费资助项目(2021ZDPY0209). （2021ZDPY0209）
