增大截面法加固震损预制装配式剪力墙的抗震性能试验
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摘要
目的采用增大截面法加固已震损预制装配式剪力墙,并对其进行抗震性能研究,为现有工程中类似构件加固提供设计依据.方法采用力与位移混合加载制度对震损预制装配式剪力墙进行低周反复荷载试验.结果经过合理和可靠的加固,试件的破坏形态为压弯破坏;加固后的预制剪力墙承载力有所提高,并且具有良好的延性变形和耗能性能.研究表明,加固后的装配式剪力墙抗震性能与受损前基本一致.结论对于预制装配式剪力墙来说,采用增大截面法是有效的抗震加固方法.
Seismic behavior of earthquake-damaged pre-cast shear wall specimen with full scale strengthened by enlarging cross-section method was studied in this paper,so as to provide references for the engineering field. Earthquake-damaged pre-cast shear wall were tested under cyclic loading. In this loading system,force and displacement control were used. The experimental results showthat after reasonable and reliable reinforcement,the failure modes of the wall was compression and bending failure; the pre-cast shear wall had a improvement effect on increasing the ultimate bearing capacity after strengthened,while maintaining good ductile deformation and energy dissipation ability. The study indicated that the seismic performance of rehabilitated pre-cast shear wall before seismic damage under a certain damage level. Enlarging cross-section is very effective seismic strengthening method for pre-cast shear wall.
Seismic behavior of earthquake-damaged pre-cast shear wall specimen with full scale strengthened by enlarging cross-section method was studied in this paper,so as to provide references for the engineering field. Earthquake-damaged pre-cast shear wall were tested under cyclic loading. In this loading system,force and displacement control were used. The experimental results showthat after reasonable and reliable reinforcement,the failure modes of the wall was compression and bending failure; the pre-cast shear wall had a improvement effect on increasing the ultimate bearing capacity after strengthened,while maintaining good ductile deformation and energy dissipation ability. The study indicated that the seismic performance of rehabilitated pre-cast shear wall before seismic damage under a certain damage level. Enlarging cross-section is very effective seismic strengthening method for pre-cast shear wall.
引文
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[2]刘聪,张宏,朱宏宇,等.装配式绿色建筑设计[J].城市建筑,2017(13):33-35.(LIU Cong,ZHANGHong,ZHU Hongyu,et al. Prefabricated green building design[J].Urban construction,2017,(13):33-35.)
[3] SMITH B J,KURAMA Y C,MCGINNIS MJ.Design and measured behavior of a hybrid precast concrete wall specimen for seismic regions[J]. Journal of structural engineering,2011,137(10):1052-1062.
[4] PEREZ F J,PESSIKI S,SAUSE R. Experimental lateral load response of unbounded post-tensioned precast concrete walls[J]. ACI structural journal,2013,110(6):1045-1055.
[5]纪颖波.我国住宅新型建筑工业化生产方式研究[J].住宅产业,2011(6):7.(JI Yingbo. Residential newbuilding industrialization production mode research in China[J]. Residential industry,2011(6):7.)
[6] ZHANGWenying, MAHDAVIAN M, YU Cheng. Different slit configuration in corrugated sheathing of cold-formed steel shear wall[J]. Journal of constructional steel research,2018,150:430-441.
[7] SHADRAVAN S,RAMSEYER C C. Investigation of wood shear walls subjected to lateral load[J]. Structures,2018,16:82-96.
[8]邓宗才,曾洪超.层内混杂FRP加固混凝土剪力墙抗震性能试验[J].北京工业大学学报,2012,38(10):1504-1508.(DENGZongcai,ZENGHongchao. Experiment on seismic performance of reinforced concrete shear walls strengthened with hybrid FRP[J]. Journal of Beijing university of technology,2012,38(10):1504-1508.)
[9] ZHOU Jing,FANGXiaodan,YAO Zhengqin.Mechanical behavior of a steel tube-confined high-strength concrete shear wall under combined tensile and shear loading[J]. Engineering structures,2018,171:673-685.
[10]梅许江,苏明,周石韵,等.角钢加固剪力墙墙肢底部试验研究[J].西华大学学报(自然科学版),2012,31(5):86-90.(MEI Xujiang,SU Ming,ZHOU Shiyun,et al.Experimentation research on application of angle steel in reinforcement of limb base of a shear wall[J]. Journal of xihua university(natural science),2012,31(5):86-90.)
[11]王希端.聚合物砂浆预应力钢丝绳抗弯加固RC旧桥研究[D].哈尔滨:东北林业大学2017.(WANGXiduan. Study on reinforced RC old bridge of polymer mortar prestressed steel wire rope[D]. Harbin:Northeast Forestry University,2017.)
[12]潘鹏,邓开来,李吉超,等.低配筋剪力墙单边抗震加固试验研究[J].工程抗震与加固改造,2013,41(4):471-476.(PAN Peng,DENGKailai,LI Jichao,et al. Experimental study on single side strengthening of low-reinforced shear wall[J]. Earthquake resistant engineering and retrofitting,2013,41(4):471-476.)
[13]封卉梅.不同类型片材加固剪力墙性能比较研究[D].郑州:郑州大学,2011.(FENGHuimei. Comparative research on behavior of reinforced concrete shear wall strengthened with different types of sheet[D].Zhengzhou:Zhengzhou University,2011.)
[14]郭宇.开洞剪力墙力学性能及加固技术研究[D].大庆:东北石油大学,2012.(GUO Yu. Study on mechanical properties and reinforcement technology of shear wall with opening[D]. Daqing:Northeast Petroleum University,2012.)
[15] WOODS J E,LAU D T,LI W. Measuring strain fields in FRP strengthened RC shear walls using a distributed fiber optic sensor[J].Engineering structures,2017,152:359-369.
[16] MOSALLAMA S,NASR A. Structural performance of RC shear walls with post-construction openings strengthened with FRP composite laminates[J]. Composites part B:engineering,2017,488-504.
[17] XIE Zhiqiang,YAN Weiming,YU Cheng. Experimental investigation of cold-formed steel shear walls with self-piercing riveted connections[J]. Thin-walled structures,2018,131:1-15.
[18]王强,路炯,侯康康,等.用于剪力墙滞回性能分析的材料本构模型研究[J].沈阳建筑大学学报(自然科学版),2018,34(3):402-409.(WANGqiang,LU Jiong,HOU Kangkang,et al. Research on material constitutive model for analysis of hysteretic performance of shear wall[J]. Journal of Shenyang jianzhu university(natural science),2018,34(3):402-409.)
[19]中冶京诚技术有限公司.钢结构设计规范:GB50017—2017[S].北京:中国建筑工业出版社,2017.(China Metallurgical Jing Cheng Technology Co. Ltd. Code for design of steel structures:GB50017—2017[S]. Beijing:China Architecture&Building Press,2017.)
[20]中国建筑科学研究院.建筑抗震设计规范:GB50011—2010[S].北京:中国建筑工业出版社,2010.(China Academy of Building Research. Code for seismic design of buildings:GB50011—2010[S]. Beijing:China Architecture&Building Press,2010.)