轻钢结构加层中新型节点抗震性能试验研究
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摘要
为了研究轻钢结构加层工程中节点的抗震性能,对传统植筋节点、碳纤维材料强化节点以及连接形式转化节点进行了拟静力试验,分析研究了节点的破坏现象、滞回曲线、骨架曲线、刚度退化、耗能能力等抗震性能。研究表明:三种轻钢结构加层节点的破坏形态均表现为梁端塑性铰破坏,最大裂缝均出现在梁端;两种新型节点的抗震性能均优于传统植筋节点,碳纤维强化节点的滞回曲线最饱满,耗能能力最强;连接形式转化节点的刚度提高程度最大,施工工艺简单。
In order to study the seismic performance of the nodes between the concrete frame and the steel adding storey,the pseudo-static tests are carried out among the three types of nodes strengthened by traditional plant steel,carbon fiber sheet and converted connection form separtately.Performance of the test specimens is evaluated in terms of failure mode,hysteretic loops,skeleton curves,stiffness degradation and energy dissipation,etc.The results of the study show that:the three types of joints' failures are due to the plastic hinges and maximum crack emerging at the end of the beam,the seismic performance of the two new types of joints strengthened by carbon fiber sheet and converted connection from is better than the traditional plant steel one,and the hysteresis curve envelope area of joint strengthened by carbon fiber sheet is the biggest,and its energy consumption capacity is the most powerful;the node strengthened by converted connection form improves the stiffness in the largest range,and its construction technique is simple and convenient.
In order to study the seismic performance of the nodes between the concrete frame and the steel adding storey,the pseudo-static tests are carried out among the three types of nodes strengthened by traditional plant steel,carbon fiber sheet and converted connection form separtately.Performance of the test specimens is evaluated in terms of failure mode,hysteretic loops,skeleton curves,stiffness degradation and energy dissipation,etc.The results of the study show that:the three types of joints' failures are due to the plastic hinges and maximum crack emerging at the end of the beam,the seismic performance of the two new types of joints strengthened by carbon fiber sheet and converted connection from is better than the traditional plant steel one,and the hysteresis curve envelope area of joint strengthened by carbon fiber sheet is the biggest,and its energy consumption capacity is the most powerful;the node strengthened by converted connection form improves the stiffness in the largest range,and its construction technique is simple and convenient.
引文
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[7]GBT50107-2010,混凝土强度检验评定标准[S]GBT50107-2010,Standard for Evaluation of Concrete Compressive Strength[S](in Chinese)
[8]GBJ228-2010,金属材料室温拉伸试验方法[S]GBJ228-2010,Metallic Materials-Tensile Testing at Ambient Temperature[S](in Chinese)
[9]JGJ101-96,建筑抗震试验方法规程[S]JGJ101-96,Specification of Testing Methods for Earthquake Resistant Building[S](in Chinese).
[2]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,2005Zhang 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)
[3]雷宏刚,秦纪平.轻钢结构增层可行性及相关问题研究[J].太原理工大学学报,2001,32(4):331～334Lei Hong-gang,Qin Ji-ping.Research on the Possibility and Relative Problems of Structure Added by Lightweight Steel Storey[J].Journal of Taiyuan University of Technology,2001,32(4):331～334(in Chinese)
[4]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):118～120Ma Jian-suo,Zhang Tao,Wang Yuan-qing,et al.Analysis of Seismic Resistance of Integral Structure after Adding Steel Storeys on Top of Concrete Frame[J].Earthquake Engineering and Engineering Vibration,2006,26(3):118～120(in Chinese)
[5]宋锋.钢结构跃层加层技术及其工程应用研究[D].北京:清华大学,2004Song Feng.The Technique of Adding Extra-floors Spanning Existing Building with Steel Structure and Its Application[D].Beijing:Tsinghua University,2004(in Chinese)
[6]王燕,李金成.轻钢增层结构的研究与应用[J].青岛建筑工程学院学报,1998,20(3):10～13Wang Yan,Li Jin-cheng.The Study and Application of the Structure of Added Light Gauge Steel Stories[J].Journal of Qingdao Institute of Architecture and Engineering,1998,20(3):10～13(in Chinese)
[7]GBT50107-2010,混凝土强度检验评定标准[S]GBT50107-2010,Standard for Evaluation of Concrete Compressive Strength[S](in Chinese)
[8]GBJ228-2010,金属材料室温拉伸试验方法[S]GBJ228-2010,Metallic Materials-Tensile Testing at Ambient Temperature[S](in Chinese)
[9]JGJ101-96,建筑抗震试验方法规程[S]JGJ101-96,Specification of Testing Methods for Earthquake Resistant Building[S](in Chinese).
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