配筋柱钢筋混凝土框架抗震性能研究

Zhongxian Li
{"title":"配筋柱钢筋混凝土框架抗震性能研究","authors":"Zhongxian Li","doi":"10.14359/18288","DOIUrl":null,"url":null,"abstract":"Based on the success of the author's previous study, the seismic behavior of a 1/3 scale model of two-bay and three-story reinforced concrete frame with short columns being replaced by split columns at lower two stories is experimentally investigated under cyclic loads to present the seismic behavior of reinforced concrete frames by using the technology of split column. At first, a test model of two-bay and three-story reinforced concrete frame scaled to 1/3 of actual frame is designed, in which the original columns at lower two stories of the model frame are short columns and are replaced by the split columns, and is applied to constant vertical loads and cyclic horizontal loads at the top of the frame. The hysteresis curves between the cyclic horizontal load and the lateral displacement at the top of the model frame is obtained, from which it is seen that under the excitation of cyclic load, the model frame underwent the process of cracking, yielding, and maximum loading, and was destroyed under the ultimate load finally. It is also seen that the model frame with split columns represents better ductility; and the ductility factor, defined as the ratio of ultimate displacement by yielding displacement, of the model frame reaches 6.0. The yielding process of the model frame is obtained from the strain values of the longitudinal bars of beams and columns, from which it is seen that the frame with split columns can realize that the plastic hinges are generated at the ends of beams at first and then the columns begin yielding while the frame has still the load and deformation capacity. When the cyclic load reaches the maximum load, the columns begin yielding, but the deformation of frame may increase continually. It is demonstrated that splitting the sort columns can change the failure mode from shear to flexure, thus enabling a frame to have much better ductility.","PeriodicalId":104265,"journal":{"name":"SP-238: International Symposium on Confined Concrete","volume":"15 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Seismic Behavior of Reinforced Concrete Frame with Split Columns\",\"authors\":\"Zhongxian Li\",\"doi\":\"10.14359/18288\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Based on the success of the author's previous study, the seismic behavior of a 1/3 scale model of two-bay and three-story reinforced concrete frame with short columns being replaced by split columns at lower two stories is experimentally investigated under cyclic loads to present the seismic behavior of reinforced concrete frames by using the technology of split column. At first, a test model of two-bay and three-story reinforced concrete frame scaled to 1/3 of actual frame is designed, in which the original columns at lower two stories of the model frame are short columns and are replaced by the split columns, and is applied to constant vertical loads and cyclic horizontal loads at the top of the frame. The hysteresis curves between the cyclic horizontal load and the lateral displacement at the top of the model frame is obtained, from which it is seen that under the excitation of cyclic load, the model frame underwent the process of cracking, yielding, and maximum loading, and was destroyed under the ultimate load finally. It is also seen that the model frame with split columns represents better ductility; and the ductility factor, defined as the ratio of ultimate displacement by yielding displacement, of the model frame reaches 6.0. The yielding process of the model frame is obtained from the strain values of the longitudinal bars of beams and columns, from which it is seen that the frame with split columns can realize that the plastic hinges are generated at the ends of beams at first and then the columns begin yielding while the frame has still the load and deformation capacity. When the cyclic load reaches the maximum load, the columns begin yielding, but the deformation of frame may increase continually. It is demonstrated that splitting the sort columns can change the failure mode from shear to flexure, thus enabling a frame to have much better ductility.\",\"PeriodicalId\":104265,\"journal\":{\"name\":\"SP-238: International Symposium on Confined Concrete\",\"volume\":\"15 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2006-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"SP-238: International Symposium on Confined Concrete\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.14359/18288\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"SP-238: International Symposium on Confined Concrete","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14359/18288","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

摘要

本文在前人研究成果的基础上,对下两层以劈裂柱取代短柱的两湾三层钢筋混凝土框架在循环荷载作用下的抗震性能进行了1/3比例尺模型试验研究,揭示了劈裂柱技术对钢筋混凝土框架抗震性能的影响。首先设计了按实际框架1/3的比例设计的两舱三层钢筋混凝土框架试验模型,其中模型框架下两层原柱为短柱,并用分体柱代替,并在框架顶部施加恒定垂直荷载和循环水平荷载。得到了循环水平荷载作用下模型框架顶部侧向位移与循环水平荷载作用下的滞回曲线,可以看出在循环荷载作用下,模型框架经历了开裂、屈服、最大荷载作用的过程,最终在极限荷载作用下被破坏。还可以看出,分体柱的模型框架具有更好的延性;模型框架的延性系数(极限位移与屈服位移之比)达到6.0。由梁柱纵筋的应变值得到模型框架的屈服过程,从中可以看出,分体柱框架可以在框架仍具有荷载和变形能力的情况下,实现梁端先产生塑性铰,然后柱开始屈服。当循环荷载达到最大荷载时,柱开始屈服,但框架的变形仍在继续增大。结果表明,分拆柱可以使框架的破坏模式由剪切破坏转变为受弯破坏,从而使框架具有更好的延性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Seismic Behavior of Reinforced Concrete Frame with Split Columns
Based on the success of the author's previous study, the seismic behavior of a 1/3 scale model of two-bay and three-story reinforced concrete frame with short columns being replaced by split columns at lower two stories is experimentally investigated under cyclic loads to present the seismic behavior of reinforced concrete frames by using the technology of split column. At first, a test model of two-bay and three-story reinforced concrete frame scaled to 1/3 of actual frame is designed, in which the original columns at lower two stories of the model frame are short columns and are replaced by the split columns, and is applied to constant vertical loads and cyclic horizontal loads at the top of the frame. The hysteresis curves between the cyclic horizontal load and the lateral displacement at the top of the model frame is obtained, from which it is seen that under the excitation of cyclic load, the model frame underwent the process of cracking, yielding, and maximum loading, and was destroyed under the ultimate load finally. It is also seen that the model frame with split columns represents better ductility; and the ductility factor, defined as the ratio of ultimate displacement by yielding displacement, of the model frame reaches 6.0. The yielding process of the model frame is obtained from the strain values of the longitudinal bars of beams and columns, from which it is seen that the frame with split columns can realize that the plastic hinges are generated at the ends of beams at first and then the columns begin yielding while the frame has still the load and deformation capacity. When the cyclic load reaches the maximum load, the columns begin yielding, but the deformation of frame may increase continually. It is demonstrated that splitting the sort columns can change the failure mode from shear to flexure, thus enabling a frame to have much better ductility.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Empirical Models for Confined Concrete under Uniaxial Loading Seismic Performance of Confined Concrete Bridge Columns Seismic Retrofit for R/C Rectangular Columns by Circular Steel Jackets Modeling of Stress-Strain Relationship and Deformability for Confined High-Strength Concrete Finite Element Study of Confined Concrete
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1