带RC支撑格构化体系柱的抗震性能试验研究
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摘要
为探索实现钢筋混凝土框架中的"强柱弱梁"的抗震设计原则,该文设计两个支撑形式分别为人字形、交叉形的格构化体系柱和一个无支撑的格构化体系柱试件,并对其进行低周期反复荷载试验。得出格构化体系柱的开裂荷载、极限承载力和破坏形态,分析带RC支撑的格构化体系柱的滞回曲线、骨架曲线、变形能力、延性等抗震性能,并和无支撑的格构化体系柱进行对比分析。分析结果表明:带RC支撑的格构化体系柱的极限承载力、抗侧刚度等抗震性能较无支撑格构化体系柱有明显的提高。在带RC支撑的格构化体系柱中,支撑和梁往往先于柱子出现塑性铰,使结构容易实现"强柱弱梁"的抗震设计目标,而不带RC支撑的格构化体系柱却很难实现。
In order to explore the "strong column weak beam" seismic design principles of reinforced concrete frames,two lattice system columns with V-braces and X-braces and a test specimen without brace were designed for cyclic tests.Based on the test results,the cracking load,ultimate bearing capacity and failure modes were obtained.Hysteretic curves,skeleton curves,deformation and Ductility coefficient ability of seismic performance of the latticed system columns with RC braces were analyzed and compared with the specimens without braces.Experimental results indicate that good seismic performance can be obtained for the Latticed System Columns with RC braces,and its resistant lateral stiffness increases obviously.For lattice system columns with RC braces,the plastic hinges of braces and beams unusually appeare in advance,which makes the structure easy to realize the target of seismic design of "strong column weak beam",however,the lattice system columns without the RC braces do not show such trend.
In order to explore the "strong column weak beam" seismic design principles of reinforced concrete frames,two lattice system columns with V-braces and X-braces and a test specimen without brace were designed for cyclic tests.Based on the test results,the cracking load,ultimate bearing capacity and failure modes were obtained.Hysteretic curves,skeleton curves,deformation and Ductility coefficient ability of seismic performance of the latticed system columns with RC braces were analyzed and compared with the specimens without braces.Experimental results indicate that good seismic performance can be obtained for the Latticed System Columns with RC braces,and its resistant lateral stiffness increases obviously.For lattice system columns with RC braces,the plastic hinges of braces and beams unusually appeare in advance,which makes the structure easy to realize the target of seismic design of "strong column weak beam",however,the lattice system columns without the RC braces do not show such trend.
引文
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[3]Maheri M R,Kousari R,Razazan M.Pushover tests onsteel X-braced and knee-braced RC frames[J].Engineering Structures,2003,25(13):1697-1705
[4]Khaloo A R,Mohseni M M.Nonlinear seismic behavior ofRC frames with RC braces[J].Asian Journal of CivilEngineering,2008,9(6):577-592
[5]孟亮.Y型偏心支撑框架循环荷载下滞回性能研究及设计建议[D].西安:西安建筑科技大学,2005(MengLiang.The analysis and design criteria of Y styleeccentrically braced steel frames under cyclic load[D].Xi’an:Xi’an University of Architecture and Technology,2005(in Chinese))
[6]邢国然.纯框架和支撑框架弹塑性稳定分析[D].杭州:浙江大学,2007(Xing Guoran.Elastic-plastic bucklinganalysis of pure frames and braced frames[D].Hangzhou:Zhejiang University,2007(in Chinese))
[7]陈新孝,牛荻涛,石建光,等.偏心支撑钢筋混凝土框架的试验研究与极限分析[J].工业建筑,2003,33(3):35-38(Chen Xinxiao,Niu Ditao,Shi Jianguang,et al.Experimental study and limit analysis on reinforced concreteframes with eccentric braces[J].Industrial Constuction,2003,33(3):35-38(in Chinese))
[8]杨禹丞.RC框架内填Y型钢支撑结构的试验研究[D].苏州:苏州科技学院,2009(Yang Yucheng,Experimental study on reinforced concrete frames with Y-eccentrically brace[D].Suzhou:Suzhou University ofScience and Technology,2009(in Chinese))
[9]Nishiura N,Kasamatsu T,Miyashita T,et al.Experimentalstudy of recycled aggregate concrete half-precast beams withlap joins[J].Transactions of the Japan Concrete Institute,2001,23:295-302
[10]JGJ101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997(JGJ101—1996Specification oftesting methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997(inChinese))
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