榫卯-灌浆套筒混合连接装配式方墩轴压性能研究
Experimental study on axial compressive performance of assembled square pier with tenon and mortar sleeve hybrid connection
林上顺 1何乐 1夏樟华 2秦志清 3张乐彤 2陈治雄4
作者信息
- 1. 福建理工大学福建省土木工程新技术与信息化重点试验室,福州 350118
- 2. 福州大学土木工程学院,福州 350108
- 3. 福建省交通规划设计院有限公司,福州 350004
- 4. 福建省榕圣市政工程股份有限公司,福州350002
- 折叠
摘要
已有研究表明,榫卯-灌浆套筒混合连接装配式方墩(简称混合连接拼装桥墩)的抗震性能接近于整体现浇桥墩.为进一步探讨混合连接拼装桥墩的轴压性能,以钢管的长度、直径以及壁厚等为变化参数,进行1个整体现浇桥墩(编号ZT)和4个混合连接拼装桥墩(编号GTA-0～GTD-0)的轴压承载力试验,结果表明,GTA-0～GTD-0试件的承载力比ZT试件提高了10.1％～14.4％,其延性系数均大于ZT试件;GTA-0～GTD-0试件的轴压承载力随钢管直径和长度的增大而增大,而钢管壁厚对于试件承载力的影响较小;拼装桥墩的破坏位置随着钢管长度的增加而上移,逐渐接近于整体现浇桥墩,但二者的破坏模式基本相同.
Abstract
Existing studies have shown that the seismic performance of the mortise and grouting sleeve mixed connection assembled square pier (referred to as the mixed connection assembled pier) is close to that of the integral cast-in-place pier. In order to further explore the axial compression performance of the mixed-connected bridge piers,a series of axial compressive tests were conducted on one integral cast-in-place bridge pier (No. ZT) and four mixed connection and assembled bridge piers (No. GTA-0～GTD-0) with varying parameters such as the length,diameter and wall thickness of the steel pipes. The results show that the bearing capacity of GTA-0～GTD-0 specimens increased by 10.1％ to 14.4％ compared to the ZT specimens,and their ductility coefficients were all greater than that of ZT specimens. The axial compression bearing capacity of GTA-0～GTD-0 specimens increased with the diameter and length of the steel pipe,while the wall thickness of the steel pipe had a relatively minor impact on the bearing capacity. The damage position of the assembled bridge pier moves upward with the increase of the steel pipe length,gradually approaching the integral cast-in-place bridge pier,but the failure modes of the two are basically the same.
关键词
装配式/混合接头/轴压试验/桥墩/承载力Key words
assembled/mixed joint/axial compression test/bridge pier/bearing capacity引用本文复制引用
基金项目
福建省自然科学基金资助项目(2019J01779)
福建省自然科学基金资助项目(2019H6020)
福建省自然科学基金资助项目(2020J1477)
福州市科技成果转移转化资助项目(2020-GX-18)
出版年
2024
国家科技期刊平台
NSTL
万方数据