|本期目录/Table of Contents|

[1]蔡忠奎,王震宇,苑溦.高强钢筋增强节段拼装桥墩抗震性能分析[J].南京工业大学学报(自然科学版),2020,42(03):312-318.
 CAI Zhongkui,WANG Zhenyu,YUAN Wei.Seismic performance of precast segmental bridge columns reinforced with high-strength steel bars[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(03):312-318.
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高强钢筋增强节段拼装桥墩抗震性能分析()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年03期
页码:
312-318
栏目:
出版日期:
2020-05-20

文章信息/Info

Title:
Seismic performance of precast segmental bridge columns reinforced with high-strength steel bars
文章编号:
1671-7627(2020)03-0312-07
作者:
蔡忠奎1王震宇2苑溦3
1.南京工业大学 土木工程学院,江苏 南京 211800; 2.哈尔滨工业大学 土木工程学院,黑龙江 哈尔滨 150090; 3.江苏开放大学 建筑工程学院,江苏 南京 210036
Author(s):
CAI Zhongkui1WANG Zhenyu2YUAN Wei3
1. College of Civil Engineering, Nanjing Tech University, Nanjing 211800, China; 2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 3. School of Civil Engineering and Architecture, Jiangsu Open University, Nanjing 210036, China
关键词:
预制节段拼装桥墩 高强钢筋 抗震性能 自复位能力
Keywords:
precast segmental bridge column high-strength steel bar seismic performance self-centering capability
分类号:
U443.22
文献标志码:
A
摘要:
为实现预制节段拼装桥墩(PSBC)地震动力响应与震后残余位移的同步控制,提出以高强钢筋替代传统PSBC中普通贯通钢筋的新方案。为验证该方案的有效性,对比分析配置普通热轧带肋钢筋HRB400、HRB500和精轧螺纹钢筋PSB785的PSBC模型的抗震性能。首先,提出了PSBC纤维模型建模方法,并将数值模拟结果与前人试验及本文作者试验结果进行对比,验证了建模方法的有效性。然后,针对上述3类PSBC模型开展单调加载分析、滞回分析及动力时程分析,对比各模型的位移延性、耗能能力、地震最大位移反应及震后残余位移。结果表明:将PSBC贯通钢筋由常用的HRB400改为PSB785型精轧螺纹钢筋,可在地震时最大位移基本不变的前提下显著减小震后残余位移。因此,建议PSBC贯通钢筋优先选用PSB785型精轧螺纹钢筋,藉此综合提高PSBC抗震性能和自复位能力。
Abstract:
To mitigate both the maximum seismic response and the post-earthquake residual drift of the precast segmental bridge column(PSBC), high-strength steel bars were applied instead of normal-strength bars. To validate the effectiveness of this scheme, the seismic performance of three types of PSBCs were compared. These three types of PSBCs were reinforced with the hot-rolled steel bars HRB400, HRB500 and the pre-stressing screw bars PSB785, respectively. First, the numerical modeling method of the PSBC was proposed and verified. Second, pushover analyses, cyclic analyses and history response analyses were conducted. The displacement ductility, energy dissipation capacity, maximum seismic displacement and post-earthquake residual displacement were compared. The research results indicated that the post-earthquake residual displacement of the PSBC reinforced with PSB785 was significantly smaller than that of the PSBC with HRB400, while the max drift responses of them were similar. It was thus suggested that, in the design of PSBCs aiming at improving the seismic performance and self-centering capabilities comprehensively, pre-stressing screw bars PSB785 should be adopted prior to the other two types steel bars.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-11-14
基金项目:国家自然科学基金青年基金(51908283,51908251); 江苏省高等学校自然科学研究计划(19KJB560013,19KJB560002)
作者简介:蔡忠奎(1989—),男,讲师,E-mail:zhongkuicai@njtech.edu.cn; 苑溦(联系人),讲师,E-mail:13b933008@hit.edu.cn.
引用格式:蔡忠奎,王震宇,苑溦.高强钢筋增强节段拼装桥墩抗震性能分析[J].南京工业大学学报(自然科学版),2020,42(3):312-318.
CAI Zhongkui, WANG Zhenyu, YUAN Wei. Seismic performance of precast segmental bridge columns reinforced with high-strength steel bars[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(3):312-318..
更新日期/Last Update: 2020-05-31