修复震损装配式剪力墙抗震性能试验研究
王 坦1,2,马先前1,李立巍2,刘 俊1,郝银龙2,周志杰1,曹艺博2,窦立军1

(1.长春工程学院 土木工程学院,吉林 长春 130012; 2.吉林省土木工程抗震减灾重点实验室,吉林 长春 130012)

震损修复; 装配式剪力墙; 增大截面法; 抗震性能

Experimental study on seismic performance of prefabricated shear wall for repairing earthquake damage
WANG Tan1,2, MA Xianqian1, LI Liwei2, LIU Jun1, HAO Yinlong2, ZHOU Zhijie1, CAO Yibo2, DOU Lijun1

(1.School of Civil Engineering, Changchun Institute of Engineering, Changchun 130012, China; (2.Jilin Provincial Key Laboratory of Civil Engineering Earthquake Resistance and Disaster Reduction, Changchun 130012, China)

earthquake damage repair; prefabricated shear wall; enlarged section method; seismic performance

DOI: 10.15986/j.1006-7930.2023.02.010

备注

对震损建筑进行加固修复能快速恢复震后的正常生活秩序,降低灾后重建的资金投入.随着装配式建筑的广泛应用,有必要针对装配式建筑震损修复后的抗震性能开展研究.本文采用两种不同方法对震损的装配式剪力墙进行修复,分别是高强灌浆料置换破损混凝土法和植筋并用钢筋网片包裹增大截面法.采用拟静力试验和有限元分析,对比修复的震损装配式剪力墙与原剪力墙在破坏模式、承载能力、延性、耗能能力、刚度退化等方面的变化,以综合评价两种方法修复剪力墙的抗震性能.研究表明,两种修复方法都能够使装配式剪力墙的承载能力得到恢复,延性和耗能能力得到提高; 使用植筋并用钢筋网片包裹增大截面法修复的试件破坏特征是钢筋网片拉断,其约束作用充分发挥,震损修复效果更好.采用的两种修复方法,施工简便、成本低,为此类结构的震损修复提供有益参考.
Strengthening and repairing the earthquake-damaged buildings can quickly restore the normal life order after the earthquake and reduce the capital investment in post-disaster reconstruction.With the wide application of prefabricated buildings, it is necessary to study the seismic performance of prefabricated buildings after earthquake damage repair.In this paper, two different methods are used to repair the earthquake-damaged prefabricated shear wall, which are the method of replacing damaged concrete with high-strength grouting material and the method of planting steel bar and enlarged cross-section wrapped with steel mesh.The pseudo-static test and finite element analysis are used to compare the changes of failure mode, bearing capacity, ductility, energy dissipation capacity and stiffness degradation between the repaired earthquake-damaged prefabricated shear wall and the original shear wall, so as to comprehensively evaluate the seismic performance of the shear wall repaired by the two methods.The study shows that the two repair methods can restore the bearing capacity of the prefabricated shear wall, improve the ductility and energy dissipation capacity.The failure characteristic of the specimen repaired by the steel bar planting and enlarged cross-section method is that the steel mesh is broken, its restraint effect is brought into full play, and the effect of earthquake damage repair is better.The two repair methods adopted have the advantages of simple construction and low cost, which provide useful reference for the earthquake damage repair of this kind of structures.