型钢高强高性能混凝土框架拟动力试验研究
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摘要
采用基于位移控制的多点地震记录输入的拟动力试验方法,进行了一榀1/4比例的两跨3层型钢高强高性能混凝土框架拟动力试验。研究了地震作用下该结构的动力反应、层间位移和楼层耗能的分布方式、结构破坏机理及裂缝形态,测试了结构在不同阶段的频率与阻尼比。试验结果显示型钢高强高性能混凝土框架具有良好的耗能能力和变形能力,框架实现了较为理想的梁铰屈服机制,楼层变形呈倒三角形分布,结构阻尼比略低于普通型钢混凝土框架结构的阻尼比。最后,基于考虑损伤退化的型钢高强高性能混凝土框架滞回模型对试验模型进行了弹塑性时程分析,并分析了计算与试验结果产生差异的原因。
A 1/4 scaled model of two-bay and three-storey steel reinforced high strength and high performance concrete frame was tested based on displacement controlled pseudo-dynamic test technique,which the earthquake record were input on multi-points at the same time.Based on the experiment result,the structural dynamic response,distribution of storey displacement and the energy dissipation,as well as the failure mechanism and crack patterns under the earthquake were studied.The variation of the structural frequency and damping ratio under different stages were tested.The results show that the steel reinforced high strength and high performance concrete frame has excellent energy dissipation capacity and deformation capacity.The plastic hinges are initially formed in beam ends and the storey displacement linearly distributes along the height of the structure.The damping ratio is lower than that of the normal strength concrete.The analysis model for the elastic-plastic earthquake response of the structure is put forward,and the calculated results agree well with the test results.
A 1/4 scaled model of two-bay and three-storey steel reinforced high strength and high performance concrete frame was tested based on displacement controlled pseudo-dynamic test technique,which the earthquake record were input on multi-points at the same time.Based on the experiment result,the structural dynamic response,distribution of storey displacement and the energy dissipation,as well as the failure mechanism and crack patterns under the earthquake were studied.The variation of the structural frequency and damping ratio under different stages were tested.The results show that the steel reinforced high strength and high performance concrete frame has excellent energy dissipation capacity and deformation capacity.The plastic hinges are initially formed in beam ends and the storey displacement linearly distributes along the height of the structure.The damping ratio is lower than that of the normal strength concrete.The analysis model for the elastic-plastic earthquake response of the structure is put forward,and the calculated results agree well with the test results.
引文
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[18]徐培福,薛彦涛,肖从真,等.高层型钢混凝土框筒混合结构抗震性能试验研究[J].建筑结构,2005,35(5):3-8.
[2]RICLES J M,PABOOJIAN S D.Seismic performance of steel-encased composite columns[J].Journal of Structural Engineering,1994,120(8):2474-2494.
[3]陆洲导,余江滔,徐朝晖.钢骨混凝土抗火性能非线性分析[J].同济大学学报:自然科学版,2006,34(11):1145-1150.
[4]叶列平,方鄂华.钢骨混凝土构件的受力性能研究综述[J].土木工程学报,2000,33(5):1-7.
[5]李俊华,王新堂,薛建阳,等.低周反复荷载下型钢高强混凝土柱受力性能试验研究[J].土木工程学报,2007,40(7):112-118.
[6]蒋东红,王连广,刘之洋.高强钢骨混凝土框架柱的抗震性能[J].东北大学学报,2002,23(1):67-70.
[7]徐世烺,江睿,贾金青,等.钢骨超高强混凝土短柱抗震性能试验研究[J].大连理工大学学报,2007,47(5):699-706.
[8]李俊华,薛建阳,王新堂,等.型钢高强混凝土柱轴压比限值的试验研究[J].世界地震工程,2007,23(2):143-160.
[9]郑山锁,曾磊,吕营,等.型钢高强高性能混凝土框架节点抗震性能试验研究[J].建筑结构学报,2008,29(3):128-136.
[10]郑山锁,李磊,邓国专.型钢高强高性能混凝土梁粘结滑移行为研究[J].工程力学,2009,26(1):104-112.
[11]李俊华,李玉顺,王建民,等.型钢混凝土柱粘结滑移本构关系与粘结滑移恢复力模型[J].土木工程学报,2010,43(3):46-52.
[12]李磊,郑山锁,李谦.基于IDA的型钢混凝土框架的地震易损性分析[J].广西大学学报:自然科学版,2011,36(4):24-30.
[13]郑山锁,邓国专,李磊.型钢高强高性能混凝土框架结构抗震性能的试验研究[J].工程力学,2009,26(5):88-93,101.
[14]李磊,郑山锁,王斌,等.型钢高强混凝土框架的循环退化效应[J].工程力学,2010,27(8):125-132.
[15]郑山锁,曾磊,车顺利,等.用于型钢混凝土组合结构强度等级为C90的混凝土:中国,200710199123.2[P].2008-06-11.
[16]邱法维,钱稼茹,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000.
[17]薛建阳,赵鸿铁.型钢钢筋混凝土框架振动台试验及弹塑性动力分析[J].土木工程学报,2000,33(2):30-34.
[18]徐培福,薛彦涛,肖从真,等.高层型钢混凝土框筒混合结构抗震性能试验研究[J].建筑结构,2005,35(5):3-8.
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