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朱振北 ，夏海余 ，彭春陽

 

（中國建筑第六工程局有限公司 ，天津 300171)

摘   要 ：為提升磚砌墻體抗震性能，保證墻體的安全，提出高延性混凝土條帶法加固磚砌墻體抗震性能數值模擬方法。采用 AAC 砌塊 、鋼筋和混凝土制備試件，選擇粉煤灰 、水泥 、砂以及 PVA 纖維等材料制備高延性混凝土，采用橫向 、縱向以及交叉條帶加固磚砌墻體試件。利用有限元軟件模擬加固和未加固試件的抗震性能。結果表明：加固后試件具有良好的抗震性能，試件承受載荷范圍在 305. 3 ~- 302. 7 kN 之間；條帶加固能夠顯著延緩磚砌墻體的剛度退化，開裂載荷和峰值載荷最高值分別達到 419. 2 和 511 . 06 kN 。

關鍵詞：高延性 ；混凝土 ；條帶法加固 ；磚砌墻體 ；抗震性能 ；數值模擬

中圖分類號：TU362           

文獻標志碼：A            

文章編號： 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

作者簡介： 朱振北  (1990—) ,   男，本科，工程師 ，研究方向：建筑工程。

收稿日期：2023 - 02 - 08