装配整体式剪力墙模型结构振动台试验研究
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摘要
为了研究装配整体式剪力墙结构的抗震性能,设计并制作了1个12层1/5装配整体式剪力墙模型结构,选用3条地震波,通过振动台试验,研究了装配整体式剪力墙模型结构的动力特性、加速度放大系数、楼层剪力和位移及最大层间位移角等动力响应,并记录了裂缝形态。试验分析表明:模型结构的自振频率在完成第一阶段水准地震波输入后下降约20%;随峰值加速度增大,模型结构自振频率减小,加速度放大系数逐渐降低,楼层剪力逐渐增大;在塑性阶段,预制墙板顶部或底部与现浇楼板连接部位出现多条水平裂缝,且沿模型高度分布较为均匀,模型结构的非线性变形明显,层间位移角显著增大,自振频率显著降低;采用层间位移角对其进行抗震性能评价,在8度抗震设防时该结构具有良好的抗震性能,但应加强预制墙板与楼板的连接,增强其整体性,避免楼层通缝的出现。
In order to study the seismic behavior of monolithic precast concrete shear wall structure,a 12-story 1/5 scale monolithic precast concrete shear wall model structure was designed and constructed. The dynamic characteristics,acceleration magnification factor,floor shear and displacement,and the maximum inter-story drift were examined through a shaking table test considering three seismic waves. The cracking phenomenon was also studied in detail. The experimental study shows that after the first loading stage the natural frequency is reduced to 80% of the original frequency. With increase in PGA,the natural frequency and the acceleration magnification factor are reduced,and the floor shear is increased. In the inelastic performance stage,evenly distributed horizontal cracks are observed of the junctions between the prefabricated wall and the floor. In addition,the model structure shows evidently nonlinear behavior,where the inter-story drift ratios increase and the natural frequency decreases significantly. By examining the peak inter-story drift ratios response,it is concluded that the monolithic precast concrete shear wall structure could be used against seismic intensity 8. However,the connection performance of the prefabricated wall and the floor should be strengthened to avoid through cracks.
In order to study the seismic behavior of monolithic precast concrete shear wall structure,a 12-story 1/5 scale monolithic precast concrete shear wall model structure was designed and constructed. The dynamic characteristics,acceleration magnification factor,floor shear and displacement,and the maximum inter-story drift were examined through a shaking table test considering three seismic waves. The cracking phenomenon was also studied in detail. The experimental study shows that after the first loading stage the natural frequency is reduced to 80% of the original frequency. With increase in PGA,the natural frequency and the acceleration magnification factor are reduced,and the floor shear is increased. In the inelastic performance stage,evenly distributed horizontal cracks are observed of the junctions between the prefabricated wall and the floor. In addition,the model structure shows evidently nonlinear behavior,where the inter-story drift ratios increase and the natural frequency decreases significantly. By examining the peak inter-story drift ratios response,it is concluded that the monolithic precast concrete shear wall structure could be used against seismic intensity 8. However,the connection performance of the prefabricated wall and the floor should be strengthened to avoid through cracks.
引文
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[2]郑永峰,郭正兴.变形灌浆套筒连接性能试验研究及有限元分析[J].建筑结构学报,2016,37(3):94-102.(ZHENG Yongfeng,GUO Zhengxing.Experimental study and finite element analysis on behavior of deformed gout-filled pipe splice[J].Journal of Building Structures,2016,37(3):94-102.(in Chinese))
[3]李宁波,钱稼茹,刘时伟,等.部分竖向分布钢筋套筒挤压连接的预制剪力墙抗震性能试验研究[J].土木工程学报,2016,49(7):36-48.(LI Ningbo,QIAN Jiaru,LIU Shiwei,et al.Experimental study on seismic behavior of pre-cast shear walls with partial vertical distributed steel bars pressed sleeve splicing[J].China Civil Engineering Journal,2016,49(7):36-48.(in Chinese))
[4]钱稼茹,彭媛媛,张景明,等.竖向钢筋套筒浆锚连接的预制剪力墙抗震性能试验[J].建筑结构,2011,41(2):1-6.(QIAN Jiaru,PENG Yuanyuan,ZHANG Jingming,et al.Tests on seismic behavior of pre-cast shear walls with vertical reinforcements spliced by grout sleeves[J].Building Structure,2011,41(2):1-6.(in Chinese))
[5]钱稼茹,杨新科,秦珩,等.竖向钢筋采用不同连接方法的预制钢筋混凝土剪力墙抗震性能试验[J].建筑结构学报,2011,32(6):51-59.(QIAN Jiaru,YANG Xinke,QIN Heng,et al.Tests on seismic behavior of pre-cast shear walls with various methods of vertical reinforcement splicing[J].Journal of Building Structures,2011,32(6):51-59.(in Chinese))
[6]SOUDKI K A,WEST J S,RIZKALLA S H,et al.Horizontal connections for precast concrete shear wall panels under cyclic shear loading[J].PCI Journal,1996,41(3):64-80.
[7]SERRETTE R L,RIZKALLA S H,ATTIOGBE E K,et al.Multiple shear key connections for precast shear wall panels[J].PCI Journal,1989,34(2):104-120.
[8]陈再现,姜洪斌,张家齐,等.预制钢筋混凝土剪力墙结构拟动力子结构试验研究[J].建筑结构学报,2011,32(6):41-50.(CHEN Zaixian,JIANG Hongbin,ZHANG Jiaqi,et al.Pseudo-dynamic substructure test on precast reinforced concrete shear wall structure[J].Journal of Building Structures,2011,32(6):41-50.(in Chinese))
[9]尹之潜,朱玉莲,杨淑文,等.高层装配式大板结构模拟地震试验[J].土木工程学报,1996,29(3):57-64.(YIN Zhiqian,ZHU Yulian,YANG Shuwen,et al.Earthquake simulation tests of tall buildings with precast large panel[J].China Civil Engineering Journal,1996,29(3):57-64.(in Chinese))
[10]王维,李爱群,贾洪,等.预制混凝土剪力墙隔震结构振动台试验研究[J].建筑结构学报,2015,36(6):35-43.(WANG Wei,LI Aiqun,JIA Hong,et al.Shaking table test of precast concrete shear wall isolation structure[J].Journal of Building Structures,2015,36(6):35-43.(in Chinese))
[11]钱稼茹,韩文龙,赵作周,等.钢筋套筒灌浆连接装配式剪力墙结构三层足尺模型子结构拟动力试验[J].建筑结构学报,2017,38(3):26-38.(QIAN Jiaru,HAN Wenlong,ZHAO Zuozhou,et al.Pseudodynamic substructure test on a 3-story full-scale model of prefabricated concrete shear wall structure with rebars splicing by grout sleeves[J].Journal of Building Structures,2017,38(3):26-38.(in Chinese))
[12]张伟林,沈小璞,吴志新,等.叠合板式剪力墙T型、L型墙体抗震性能试验研究[J].工程力学,2012,29(6):196-201.(ZHANG Weilin,SHEN Xiaopu,WU Zhixin,et al.Experimental study of seismic performance on T and L types superimposed-slab-shearwalls structure[J].Engineering Mechanics,2012,29(6):196-201.(in Chinese))
[13]Einea A,Salmon D C,Fogarasi G J,et al.State-of the-art of precast concrete sandwich panels[J].PCI Journal,1991,36(6):78-98.
[14]周颖,吕西林.建筑结构振动台模型试验方法与技术[M].北京:科学出版社,2012:7-15.(ZHOU Ying,LU Xilin.The experimental method and technology of shaking table test about building structure[M].Beijing:Science Press,2012:7-15.(in Chinese))
[15]湖南大学,太原工业大学,福州大学.建筑结构试验[M].2版.北京:中国建筑工业出版社,1991.
[16]装配式混凝土结构技术规程:JGJ 1—2014[S].北京:中国建筑工业出版社,2014.(Technical specification for precast concrete structures:JGJ 1—2014[S].Beijing:China Architecture&Building Press,2014.(in Chinese))
[17]装配式混凝土结构住宅建筑设计示例(剪力墙结构):15J939-1[S].北京:中国计划出版社,2015.(Example of architectural design for prefabricated concrete structures:15J939-1[S].Beijing:China Planning Press,2015.(in Chinese))
[18]建筑抗震试验规程:JGJ/T 101—2015[S].北京:中国建筑工业出版社,2015.(Specification for seismic test of buildings:JGJ/T 101—2015[S].Beijing:China Architecture&Building Press,2015.(in Chinese))
[19]CHAKRABARTI S C,NAYAK G C,PAUL D K.Shear characteristics of cast-in-place vertical joints in story-high precast wall assembly[J].ACI Structural Journal,1988,85(1):30-45.
[20]清华大学抗震抗暴工程研究室.结构模型的振动台试验研究[M]//科学研究报告集.第5集.北京:清华大学出版社,1989.
[21]王长青,肖建庄.再生混凝土框架结构抗震性能[M].北京:科学出版社,2016.