[1]顾箭峰,向春燕,黄民水,等.套筒埋置位置对预制拼装桥墩结构抗震性能影响[J].长安大学学报(自然科学版),2022,42(5):73-85.[doi:10.19721/j.cnki.1671-8879.2022.05.008]
　GU Jian-feng,XIANG Chun-yan,HUANG Min-shui,et al.Influence of sleeve embedded location on seismic performance of precast assembled bridge pier structure[J].Journal of Chang’an University (Natural Science Edition),2022,42(5):73-85.[doi:10.19721/j.cnki.1671-8879.2022.05.008]
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套筒埋置位置对预制拼装桥墩结构抗震性能影响()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第42卷
期数:
2022年5期
页码:
73-85
栏目:
桥梁与隧道工程
出版日期:
2022-09-30

文章信息/Info

Title:
Influence of sleeve embedded location on seismic performance of precast assembled bridge pier structure
文章编号:
1671-8879(2022)05-0073-13
作者:
顾箭峰; 向春燕; 黄民水; 卢海林; 杨宏印
(武汉工程大学 土木工程与建筑学院,湖北 武汉 430074)
Author(s):
GU Jian-feng;  XIANG Chun-yan;  HUANG Min-shui;  LU Hai-lin;  YANG Hong-yin
(School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, Hubei, China)
关键词:
桥梁工程;  预拼桥墩;  拟静力试验;  抗震性能;  数值分析;  现浇桥墩
Keywords:
bridge engineering;  precast assembled bridge pier;  quasi-static test;  seismic performance;  numerical analysis;  cast-in-place pier
分类号:
U442.55
DOI:
10.19721/j.cnki.1671-8879.2022.05.008
文献标志码:
A
摘要:
为研究套筒埋置位置对预拼桥墩结构抗震性能的影响,对套筒埋置于墩柱中部和顶部的2个预拼桥墩试件和1个现浇桥墩试件进行拟静力试验,对比分析预拼桥墩与现浇桥墩的抗震性能差异; 基于此,利用有限元模拟接缝位于墩柱底部、中部和顶部及套筒埋置于各接缝上下的预拼桥墩结构,并从滞回曲线、骨架曲线、位移延性系数、耗能能力和刚度退化等指标定量分析各结构的抗震性能。研究结果表明:套筒埋置于墩柱中部和盖梁的预拼桥墩结构与现浇桥墩结构的破坏形态基本一致,均呈弯曲破坏特征,套筒连接可减缓预拼桥墩结构的斜裂缝产生及保护层剥落。接缝位于墩柱中部、底部和顶部的预拼桥墩结构承载力依次下降。接缝位于墩柱中部的预拼桥墩结构承载力略高于现浇桥墩,套筒埋置于盖梁的预拼桥墩结构承载力与现浇桥墩相当,套筒埋置于墩柱顶的预拼桥墩结构承载力最差。同一接缝位置的预拼桥墩,套筒埋置于接缝上的结构承载力高于套筒埋置于接缝下的结构。套筒埋置于承台和墩底的预拼桥墩结构延性较好,延性系数分别比现浇桥墩大7.7%和5.5%,套筒埋置于墩柱顶的预拼桥墩结构延性系数与现浇桥墩相当,其余试件延性性能均比现浇桥墩差。接缝位于墩柱中部、底部和顶部的预拼桥墩结构抗震性能依次减小,套筒埋置于墩柱中部并位于接缝之上的预拼桥墩结构抗震性能略优于现浇桥墩,埋置于墩柱中部并位于接缝之下的预拼桥墩结构抗震性能与现浇桥墩相当,而埋置于盖梁的预拼桥墩结构抗震性能最差。
Abstract:
To study the influence of sleeve embedded location on the seismic performance of precast bridge pier structure, quasi-static tests were carried out on two precast bridge piers with the sleeve embedded in the middle and top of the pier column, as well as a cast-in-place pier. The difference between the seismic performance of the precast bridge pier and the cast-in-place pier was compared and analyzed. Furthermore, the precast bridge pier structures with the joint at the bottom, middle and top of the pier column, and the sleeve embedded above and below each joint were simulated using the finite element method. The seismic performance of each structure was quantitatively analyzed by the hysteresis curve, skeleton curve, displacement ductility coefficient, energy dissipation capacity and stiffness degradation. The results show that the failure modes of the precast pier structures with the sleeve embedded in the middle of the pier column and the cover beam are similar to that of the cast-in-place pier structure, which shows the bending failure characteristics. The sleeves can mitigate the formation of inclined cracks and spallation of the protective layer in precast pier structures. The bearing capacity of precast pier structures with the joint located in the middle, bottom and top of the pier column decreases successively. The bearing capacity of the precast pier structure with the joint in the middle of the pier column is slightly higher than that of the cast-in-place pier. The bearing capacity of the precast pier structure with the sleeve embedded in the cover beam is similar to that of the cast-in-place pier, and the bearing capacity of the precast pier structure with the sleeve embedded in the top of the pier column is the worst. For the precast pier at the same joint position, the structural bearing capacity of the sleeve embedded on the joint is higher than that of the sleeve embedded under the joint. The ductility of the precast pier structures with sleeve embedded in the bearing platform and bottom of the pier column is the best, and the ductility coefficients are 7.7% and 5.5% higher than that of the cast-in-place pier, respectively. The ductility coefficient of the precast pier structure with sleeve embedded in the top of the pier column is equivalent to that of the cast-in-place pier, and the ductility performance of other specimens is lower than that of the cast-in-place pier. The seismic performance of the precast pier structures with the joint located in the middle, bottom and top the pier column decreases successively, and the seismic performance of precast pier structure with sleeve embedded in the middle of the pier column and above the joint is slightly better than that of the cast-in-place pier. The seismic performance of the precast pier structure embedded in the middle of the pier column and below the joint is equivalent to that of the cast-in-place pier, while the seismic performance of the precast pier structure embedded in the cover beam is the worst.5 tabs, 18 figs, 26 refs.

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金项目(52178300); 武汉市城建委科技计划项目(201804); 武汉工程大学研究生教育创新基金项目(CX2021118)
作者简介:顾箭峰(1986-),男,湖北咸宁人,副教授,工学博士,E-mail:17010101@wit.edu.cn。 通讯作者:卢海林(1965-),男,湖南常德人,教授,博士研究生导师,E-mail:hail_lu@yangtzeu.edu.cn。
更新日期/Last Update: 2022-09-30