新型装配整体式墙体抗震性能试验研究
摘要
文中针对北京市建筑设计研究院有限公司提出的两种新型装配整体式剪力墙结构连接构造设计了两组墙片试验。试验墙片采用预制构件,并预埋连接件。装配时,墙片之间利用预埋件焊接连接,称为干式连接;上下层墙片之间采用现浇方式与楼板连接在一起,这种方法增强了墙体的整体性,可大幅度降低混凝土现场湿作业量。本文设计了两组墙片试验,第1组试验检验墙片竖缝位置干式连接方式的抗震性能;第2组试验体检验型钢边缘约束构件、型钢抗剪键和高强度灌浆料后浇带的连接性能。两组试验各建造两个试验体,第1组两个试验体相同,第2组两个试验体分别采用不同的轴压比。试验结果表明:干式连接方式可以充分传递截面上的剪力,使腹板墙和翼缘墙协调工作;采用型钢的约束边缘构件具有较好的延性,有效地延缓了墙片角部的破坏。
A novel assembled monolithic concrete wall structure is proposed in this paper,which is featured in dry connections and steel boundary elements.The wall is pre-fabricated in factories with embedded parts on each side of the wall.Steel angles and I-shaped steel are employed as the boundary elements and shear force transferring element,respectively.When being constructed,the walls are connected by welding the embedded steels,while concrete shall be cast in site to construct the slab.This technique on the one hand improves the integrity of the structure system,and on the other hand reduces the concrete-cast work significantly.Two groups of specimens are designed and tested in this study,each containing two specimens.In the first group,two specimens are tested repeatedly to examine the seismic behavior of the dry connections,while the two specimens of the second group,each sustaining different axial force,are used to improve the effectiveness of steel boundary elements and the shear connector.The results demonstrate that the dry connection is sufficient to transferring shear forces between wall pieces amd makes the web wall and flange walls work together.And the steel boundary element makes the wall pieces have considerable ductility and delays the concrete crush at the feet of wall pieces.
A novel assembled monolithic concrete wall structure is proposed in this paper,which is featured in dry connections and steel boundary elements.The wall is pre-fabricated in factories with embedded parts on each side of the wall.Steel angles and I-shaped steel are employed as the boundary elements and shear force transferring element,respectively.When being constructed,the walls are connected by welding the embedded steels,while concrete shall be cast in site to construct the slab.This technique on the one hand improves the integrity of the structure system,and on the other hand reduces the concrete-cast work significantly.Two groups of specimens are designed and tested in this study,each containing two specimens.In the first group,two specimens are tested repeatedly to examine the seismic behavior of the dry connections,while the two specimens of the second group,each sustaining different axial force,are used to improve the effectiveness of steel boundary elements and the shear connector.The results demonstrate that the dry connection is sufficient to transferring shear forces between wall pieces amd makes the web wall and flange walls work together.And the steel boundary element makes the wall pieces have considerable ductility and delays the concrete crush at the feet of wall pieces.
引文
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[8]常业军,柳炳康,宋国华.装配式钢筋混凝土构件竖向齿槽接缝强度的研究[J],建筑科学,2000,16(6):38-42.CHANG Yejun,LIU Bingkang,SONG Guohua.A study of strength of precast reinforced concrete assemblage with vertical joint composed of doweland alveolus connection[J].Building Science,2000,16(6):38-42.(in Chinese)
[9]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.Various methods of vertical reinforcement splicing[J].Journal of Building Structures,2011,32(6):51-59.(in Chinese)
[2]王墩,吕西林.预制混凝土剪力墙结构抗震性能研究进展[J].结构工程师,2010,6(26):128-135.WANG Dun,LU Xilin.Progress of study on seismic performance of precast concrete shear wall systems[J].Structural Engineers,2010,6(26):128-135.(in Chinese)
[3]蔡柳鹤,李文峰,张国伟,等.新型预制装配式剪力墙水平连接缝的抗震试验研究[C]//第十三届高层建筑抗震技术交流会.2011.CAI Liuhe,LI Wenfeng,ZHANG Guowei,et al.Tests on seismic behavior of steel-concrete composite fabricated shear wall specimens[C]//Ad-vanced Materials Research,2011,Vols.368-373:189-192.(in Chinese)
[4]Felipe J,Perez,Richard Sause,et al.Analytical and experimental lateral load behavior of unbonded posttensioned precast concrete Walls[J].Jour-nal of Structural Engineering,2007,133(11):1531-1540.
[5]Sriram Aaleti,Sri Sritharan.A simplified analysis method for characterizing unbonded post-tensioned precast wall systems[J].Engineering Struc-tures,2009,31:2966-2975.
[6]Tony Holden,Jose Restrepo,John B.Seismic performance of precast reinforced and Pre-stressed concrete walls[J].Journal of Structural Engineer-ing,2003,129(3):286-296.
[7]朱张峰,郭正兴.预制装配式剪力墙结构墙板节点抗震性能研究[J].地震工程与工程振动,2011,31(1):35-40.ZHU Zhangfeng,GUO Zhengxing.Seismic perforemance research on wall-slab joints of new precast concrete shear wall structure[J].Journal ofEarthquake Engineering and Engineering Vibration,2011,31(1):35-40.(in Chinese)
[8]常业军,柳炳康,宋国华.装配式钢筋混凝土构件竖向齿槽接缝强度的研究[J],建筑科学,2000,16(6):38-42.CHANG Yejun,LIU Bingkang,SONG Guohua.A study of strength of precast reinforced concrete assemblage with vertical joint composed of doweland alveolus connection[J].Building Science,2000,16(6):38-42.(in Chinese)
[9]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.Various methods of vertical reinforcement splicing[J].Journal of Building Structures,2011,32(6):51-59.(in Chinese)
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