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朱振北 ，夏海余 ，彭春阳

 

（中国建筑第六工程局有限公司 ，天津 300171)

摘   要 ：为提升砖砌墙体抗震性能，保证墙体的安全，提出高延性混凝土条带法加固砖砌墙体抗震性能数值模拟方法。采用 AAC 砌块 、钢筋和混凝土制备试件，选择粉煤灰 、水泥 、砂以及 PVA 纤维等材料制备高延性混凝土，采用横向 、纵向以及交叉条带加固砖砌墙体试件。利用有限元软件模拟加固和未加固试件的抗震性能。结果表明：加固后试件具有良好的抗震性能，试件承受载荷范围在 305. 3 ~- 302. 7 kN 之间；条带加固能够显著延缓砖砌墙体的刚度退化，开裂载荷和峰值载荷最高值分别达到 419. 2 和 511 . 06 kN 。

关键词：高延性 ；混凝土 ；条带法加固 ；砖砌墙体 ；抗震性能 ；数值模拟

中图分类号：TU362           

文献标志码：A            

文章编号： 1005- 8249   (2024)  06- 0120- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.001

 

ZHU Zhenbei ,  XIA Haiyu ,  PENG Chunyang

(China Construction Sixth Engineering Bureau Corp. ，Ltd ,  Tianjin 300171 ,   China)

Abstract: To improve the seismic performance of brick walls and ensure their safety, a numerical simulation method for strengthening the seismic performance of brick walls using high ductility concrete strip method is proposed. Using AAC blocks as the main material, the wall specimens are constructed using steel bars and concrete; Select materials such as fly ash, cement, sand, and PVA fibers to prepare high ductility concrete, and reinforce brick wall specimens with horizontal, vertical, and intersecting strips. Simulate the seismic performance of reinforced and unreinforced specimens using finite element software. The results showed that the load-bearing range of the reinforced specimens increased from 220.4 kN to -222.6 kN to 305.3 to -302.7 kN, indicating good resistance to collapse; After the displacement load increased to 10 mm, the stiffness value of the reinforced specimen no longer continued to decrease, but remained at 55.5 kN · mm, indicating that strip reinforcement can significantly delay the stiffness degradation of brick walls; The cracking load and peak load of the specimen before reinforcement were both within 300 kN, and the highest values after reinforcement reached 419.2 and 511.06 kN, respectively.

Keywords :  high ductility;  concrete;  strip reinforcement;  brick wall;  seismic performance;  numerical  simulation

作者简介： 朱振北  (1990—) ,   男，本科，工程师 ，研究方向：建筑工程。

收稿日期：2023 - 02 - 08