[1]朱绩超,熊亮军.不同加载路径下RC墩柱抗震性能试验研究[J].东南大学学报(自然科学版),2020,50(6):1006-1013.[doi:10.3969/j.issn.1001-0505.2020.06.003]
 Zhu Jichao,Xiong Liangjun.Experimental study on seismic behaviors of RC pier columns under different loading paths[J].Journal of Southeast University (Natural Science Edition),2020,50(6):1006-1013.[doi:10.3969/j.issn.1001-0505.2020.06.003]
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不同加载路径下RC墩柱抗震性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
50
期数:
2020年第6期
页码:
1006-1013
栏目:
交通运输工程
出版日期:
2020-11-20

文章信息/Info

Title:
Experimental study on seismic behaviors of RC pier columns under different loading paths
作者:
朱绩超熊亮军
大连交通大学土木工程学院, 大连 116028
Author(s):
Zhu Jichao Xiong Liangjun
School of Civil Engineering, Dalian Jiaotong University, Dalian 116028, China
关键词:
抗震性能 加载路径 拟静力试验 钢筋混凝土墩柱 损伤指数
Keywords:
seismic behaviors loading paths pseudo-static tests reinforced concrete pier columns damage index
分类号:
U442.55
DOI:
10.3969/j.issn.1001-0505.2020.06.003
摘要:
通过7个剪跨比为3的钢筋混凝土(RC)墩柱试件拟静力试验,研究了不同加载路径对RC墩柱抗震性能影响.结果表明:试件破坏形态均为压弯破坏,主要破坏特征为纵筋受压屈曲、受拉断裂或混凝土压溃,滞回曲线较饱满;循环次数、位移幅值及位移增量对RC墩柱抗震性能均有影响,由位移延性、耗能及损伤指标分析可知,相同位移幅值下循环次数增加会削弱试件的抗震性能,使其累积损伤程度加重,变形能力降低,10次循环较3次循环试件位移延性降低约22%,试件屈服后较大位移幅值下循环次数增加引起的循环退化效应尤为明显;当循环次数相同时,随位移增量增大,试件破坏所经历的累积损伤减小,承载力退化幅度降低,位移延性提高.
Abstract:
Pseudo-static tests of seven reinforced concrete(RC)pier columns with the shear span ratio of 3 were conducted to study the influence of different loading paths on the seismic behaviors of RC pier columns. The results demonstrate that the specimens are failed in the compression-bending mode, which was evident by the presence of buckled, ruptured longitudinal reinforcement or crushed concrete, as well as plump later force-displacement hysteresis loops. The effects of the loading cycle number, the displacement amplitude and the displacement increment on the seismic behaviors of the RC pier columns are evident. According to the analysis of the displacement ductility, the energy dissipation capacity and the damage index, the increase of the loading cycle number at the same displacement amplitude impairs the seismic performance, accelerates the damage accumulation of the specimen, and reduces the deformation capacity of the specimen. The displacement ductility of the specimen drops by about 22% when the number of the loading cycles increases from 3 to 10. The cycle degradation effect caused by the increase of the loading cycle number is more significant at the large displacement amplitude after the yielding load. With the same loading cycle number, the increase of the displacement amplitude can reduce the failure cumulative damage of the specimens and the degradation of the bearing capacity, and increase the displacement ductility.

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[2]朱绩超,贡金鑫,熊亮军,等.不同循环次数下RC桥墩抗震性能试验研究[J].东南大学学报(自然科学版),2019,49(4):652.[doi:10.3969/j.issn.1001-0505.2019.04.007]
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备注/Memo

备注/Memo:
收稿日期: 2020-05-19.
作者简介: 朱绩超(1981—),男,博士,高级实验师,35867935@qq.com.
基金项目: 教育部产学合作协同育人资助项目(201901262022)、辽宁省自然科学基金指导计划资助项目(2019-ZD-0095)、2018年度辽宁省土木工程实验教学示范中心资助项目.
引用本文: 朱绩超,熊亮军.不同加载路径下RC墩柱抗震性能试验研究[J].东南大学学报(自然科学版),2020,50(6):1006-1013. DOI:10.3969/j.issn.1001-0505.2020.06.003.
更新日期/Last Update: 2020-11-20