新型外包加强型节点抗震性能试验研究
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摘要
为了减小钢筋混凝土(RC)框架-轻钢增层混合结构的鞭梢效应,本文提出了一种用于该类结构的新型外包加强型节点,旨在加强对上部结构的约束,减小上下部结构的刚度突变。为了深入研究其抗震性能,与另一种外包锚固式节点进行了低周往复荷载作用下的对比性试验研究。结果表明:两种节点均表现为梁端塑性铰破坏,并能有效控制裂缝开展;新型外包加强型节点滞回曲线饱满,捏拢速度较慢,并能将塑性铰外移,有效保护了节点核心区,其刚度退化、等效黏滞阻尼系数、耗能能力等各项指标都较外包锚固式节点有不同程度的提升,提高了节点的承载力和刚度,具有更好的抗震性能。本文的研究可以为轻钢增层混合结构的推广应用提供科学依据和技术支持。
In order to reduce the whipping effect of the reinforced concrete( RC) frame-lightweight steel mixed structure,a new type of outsourced enhanced joint used for this kind of structure is proposed in this paper,which aims to strengthen the constraint on the upper structure,and reduce the stiffness mutation of the upper and lower structure. In order to study its seismic performance in depth,a comparative experimental study under low cycle reciprocating load was carried out with another outsourced anchored joint. The results show that the both kinds of joints are all characterized by plastic hinge failure of the beam end,and can effectively control the development of crack. The hysteretic curve of the new type of outsourced enhanced joint is full,the pinching speed is slow,and the plastic hinge can be moved outward,the core area of the joint is effectively protected,the stiffness degradation,equivalent viscous damping coefficient,energy dissipation capacity and other indicators are improved to different degrees than the outsourced anchored joint,which improves the bearing capacity and stiffness of the joint,and has better seismic performance. The research in this paper can provide scientific basis and technical support for the popularization and application of lightweight steel mixed structure.
In order to reduce the whipping effect of the reinforced concrete( RC) frame-lightweight steel mixed structure,a new type of outsourced enhanced joint used for this kind of structure is proposed in this paper,which aims to strengthen the constraint on the upper structure,and reduce the stiffness mutation of the upper and lower structure. In order to study its seismic performance in depth,a comparative experimental study under low cycle reciprocating load was carried out with another outsourced anchored joint. The results show that the both kinds of joints are all characterized by plastic hinge failure of the beam end,and can effectively control the development of crack. The hysteretic curve of the new type of outsourced enhanced joint is full,the pinching speed is slow,and the plastic hinge can be moved outward,the core area of the joint is effectively protected,the stiffness degradation,equivalent viscous damping coefficient,energy dissipation capacity and other indicators are improved to different degrees than the outsourced anchored joint,which improves the bearing capacity and stiffness of the joint,and has better seismic performance. The research in this paper can provide scientific basis and technical support for the popularization and application of lightweight steel mixed structure.
引文
[1]张涛.既有建筑顶部钢结构加层的结构设计与抗震性能分析[D].北京:清华大学,2005.ZHANG Tao. Integral design and seismic resistant property analysis of the adding steel stories on the top of the original buildings[D]. Beijing:Tsinghua University,2005.(in Chinese)
[2]麻建锁,张涛,王元清,等.钢筋混凝土框架顶部钢结构加层的抗震性能分析[J].地震工程与工程振动,2006,26(3):118-120.MA Jiansuo,ZHANG Tao,WANG Yuanqing,et al. Analysis of seismic resistance of integral structure after adding steel storeys on top of concerete frame[J]. Earthquake Engineering and Engineering Dynamics,2006,26(3):118-120.(in Chinese)
[3]杨晓明,周东明,李海峰.某高层建筑加层钢框架柱脚节点的抗震构造[J].工业建筑,2007,37(9):113-115.YANG Xiaoming,ZHOU Dongming,LI Haifeng. The seismic constructional disposal on the column base joint of steel frame adding story on the top of a tall building[J]. Industrial Construction,2007,37(9):113-115.(in Chinese)
[4]庞明,朱杰利,苏亮.轻型钢结构增层设计的浅论[J].西部探矿工程,2003:137-138.PANG Ming,ZHU Jieli,SU Liang. Brief discussion on the design of lightweight steel structure[J]. West-China Exploration Engineering,2003:137-138.(in Chinese)
[5]任媛,杨国栋.轻钢增层刚度突变相关问题的研究[J].建材技术与应用,2010(10):7-9.REN Yuan,YANG Guodong. Study on the problem related to stiffness mutation of lightweight steel[J]. Research and Application of Building Materials,2010(10):7-9.(in Chinese)
[6]张淼,张瑞云.增层隔震结构的抗震性能反应研究[J].地震工程与工程振动,2014,34(增刊1):885-890.ZHANG Miao,ZHANG Ruiyun. Research on the seismic performance of isolated additional stories structure[J]. Earthquake Engineering and Engineering Dynamics,2014,34(S1):885-890.(in Chinese)
[7]宗钟凌,曹双寅,张皓,等.混凝土框架顶部钢结构加层连接节点抗震性能试验研究[J].建筑结构学报,2011,32(7):127-132.ZONG Zongling,CAO Shuangyin,ZHANG Hao,et al. Experimental study on seismic behavior of joints between concrete frame and added top steel stories[J]. Journal of Building Structures,2011,32(7):127-132.(in Chinese)
[8]谢冰花,陈道政.框架结构轻钢加层钢柱脚节点设计与施工[J].施工技术,2014,43(20):86-88.XIE Binghua,CHEN Daozheng. The design and construction of column base joint of appending story with light weight steels on the top of concrete frame structure[J]. Construction Technology,2014,43(20):86-88.(in Chinese)
[9] JGJ/T101-2015建筑抗震试验规程[S].北京:中国建筑工业出版社,2015.JGJ/T101-2015 Specification for seismic test of budildings[S]. Beijing:China Architecture&Building Press,2015.(in Chinese)
[10] GB50011-2010(2016年版)中国建筑科学研究院.建筑抗震设计规范[S].北京:中国建筑工业出版社,2016.GB50011-2010(2016 Edition)Code for Seismic Design of Buildings[S]. Beijing:China Architecture&Building Press,2016.(in Chinese)
[11]范力,张宁.抗震试验中多自由度结构的滞回曲线分析[J].工业建筑,2007,37(增刊1):283-286.FAN Li,ZHANG Ning. Analysis of hysteretic crurve of mdof structures in seismic test[J]. Industrial Construction,2007,37(S1):283-286.(in Chinese)
[12]熊呈辉,周天瑞,李军红,等.包辛格效应的原理及其在冷轧带肋钢筋中的应用[J].南方金属,2004(6):19-22.XIONG Chenghui,ZHOU Tianrui,LI Junhong,et al. Bauschinger effect and its application in cold rolling ribbed bars[J]. Southern Metals,2004(6):19-22.(in Chinese)
[13]郭蓉,赵少伟,尹成林.轻钢结构加层中新型节点抗震性能试验研究[J].工程抗震与加固改造,2013,35(3):97-102.GUO Rong,ZHAO Shaowei,YIN Chenglin. Experimental study on the seismic behavior of new-type joints in steel adding storey[J]. Earthquake Resistant Engineering and Retrofitting,2013,35(3):97-102.(in Chinese)
[2]麻建锁,张涛,王元清,等.钢筋混凝土框架顶部钢结构加层的抗震性能分析[J].地震工程与工程振动,2006,26(3):118-120.MA Jiansuo,ZHANG Tao,WANG Yuanqing,et al. Analysis of seismic resistance of integral structure after adding steel storeys on top of concerete frame[J]. Earthquake Engineering and Engineering Dynamics,2006,26(3):118-120.(in Chinese)
[3]杨晓明,周东明,李海峰.某高层建筑加层钢框架柱脚节点的抗震构造[J].工业建筑,2007,37(9):113-115.YANG Xiaoming,ZHOU Dongming,LI Haifeng. The seismic constructional disposal on the column base joint of steel frame adding story on the top of a tall building[J]. Industrial Construction,2007,37(9):113-115.(in Chinese)
[4]庞明,朱杰利,苏亮.轻型钢结构增层设计的浅论[J].西部探矿工程,2003:137-138.PANG Ming,ZHU Jieli,SU Liang. Brief discussion on the design of lightweight steel structure[J]. West-China Exploration Engineering,2003:137-138.(in Chinese)
[5]任媛,杨国栋.轻钢增层刚度突变相关问题的研究[J].建材技术与应用,2010(10):7-9.REN Yuan,YANG Guodong. Study on the problem related to stiffness mutation of lightweight steel[J]. Research and Application of Building Materials,2010(10):7-9.(in Chinese)
[6]张淼,张瑞云.增层隔震结构的抗震性能反应研究[J].地震工程与工程振动,2014,34(增刊1):885-890.ZHANG Miao,ZHANG Ruiyun. Research on the seismic performance of isolated additional stories structure[J]. Earthquake Engineering and Engineering Dynamics,2014,34(S1):885-890.(in Chinese)
[7]宗钟凌,曹双寅,张皓,等.混凝土框架顶部钢结构加层连接节点抗震性能试验研究[J].建筑结构学报,2011,32(7):127-132.ZONG Zongling,CAO Shuangyin,ZHANG Hao,et al. Experimental study on seismic behavior of joints between concrete frame and added top steel stories[J]. Journal of Building Structures,2011,32(7):127-132.(in Chinese)
[8]谢冰花,陈道政.框架结构轻钢加层钢柱脚节点设计与施工[J].施工技术,2014,43(20):86-88.XIE Binghua,CHEN Daozheng. The design and construction of column base joint of appending story with light weight steels on the top of concrete frame structure[J]. Construction Technology,2014,43(20):86-88.(in Chinese)
[9] JGJ/T101-2015建筑抗震试验规程[S].北京:中国建筑工业出版社,2015.JGJ/T101-2015 Specification for seismic test of budildings[S]. Beijing:China Architecture&Building Press,2015.(in Chinese)
[10] GB50011-2010(2016年版)中国建筑科学研究院.建筑抗震设计规范[S].北京:中国建筑工业出版社,2016.GB50011-2010(2016 Edition)Code for Seismic Design of Buildings[S]. Beijing:China Architecture&Building Press,2016.(in Chinese)
[11]范力,张宁.抗震试验中多自由度结构的滞回曲线分析[J].工业建筑,2007,37(增刊1):283-286.FAN Li,ZHANG Ning. Analysis of hysteretic crurve of mdof structures in seismic test[J]. Industrial Construction,2007,37(S1):283-286.(in Chinese)
[12]熊呈辉,周天瑞,李军红,等.包辛格效应的原理及其在冷轧带肋钢筋中的应用[J].南方金属,2004(6):19-22.XIONG Chenghui,ZHOU Tianrui,LI Junhong,et al. Bauschinger effect and its application in cold rolling ribbed bars[J]. Southern Metals,2004(6):19-22.(in Chinese)
[13]郭蓉,赵少伟,尹成林.轻钢结构加层中新型节点抗震性能试验研究[J].工程抗震与加固改造,2013,35(3):97-102.GUO Rong,ZHAO Shaowei,YIN Chenglin. Experimental study on the seismic behavior of new-type joints in steel adding storey[J]. Earthquake Resistant Engineering and Retrofitting,2013,35(3):97-102.(in Chinese)