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趙亞軍1 ,2 ,  劉    洋1  ,  吳    昊1 ,  方賓彬1

 

(1 . 河北工程大學(xué) 土木工程學(xué)院 ，河北 邯鄲 056038 ;

2. 河北工程大學(xué) 力學(xué)實(shí)驗(yàn)教學(xué)示范中心 ，河北 邯鄲 056038)

摘   要 ：為提高磚砌體建筑的抗彎與抗傾覆性能， 同時(shí)保留原有風(fēng)貌，提出鋼絲繩嵌縫纏繞加固磚砌體的技術(shù)。通過使用壓力試驗(yàn)機(jī)對砌體結(jié)構(gòu)進(jìn)行沿通縫截面抗彎試驗(yàn)，采用數(shù)字圖像相關(guān)方法  (DIC)  獲取砌體結(jié)構(gòu)表面應(yīng)變場，分析試件的破壞模式和荷載－位移曲線，研究鋼絲繩嵌縫加固磚砌體結(jié)構(gòu)受荷時(shí)的受力特征與協(xié)同工作機(jī)理，并在試驗(yàn)的基礎(chǔ)上建立了抗彎試件的數(shù)值模型。結(jié)果表明： 鋼絲繩嵌縫加固可建立有效的砌體層間聯(lián)系，在水平和豎向上約束磚砌體，保持砌體的整體性；加固后砌體結(jié)構(gòu)抗彎性能顯著提高，嵌入 2 、3 mm  鋼絲繩使承載力分別提高 26% 和 46% ,  峰值荷載對應(yīng)的撓度分別提高了51% 和 77% ,  脆性破壞特性得到改善。 該方法可用于城市更新中需要保留外觀的砌體加固改造工程。

關(guān)鍵詞：受彎砌體 ；鋼絲繩嵌縫加固 ；應(yīng)變場 ；數(shù)值模擬

中圖分類號：TU362           

文獻(xiàn)標(biāo)志碼：A           

文章編號： 1005- 8249   (2024)  06- 0096- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.018

 

ZHAO Yajun^{1 , 2} ,  LIU Yang¹  ,  WU Hao¹ ,  FANG Binbin¹

( 1 . School of Civil Engineering ,   Hebei University of Engineering ,   Handan 056038 ,   China;  2. Experimental

Teaching Demonstration Center of Mechanics ,   Hebei University of Engineering ,   Handan 056038 ,   China)

Abstract: In order to improve the bending resistance and overturning resistance of historical brick masonry buildings while retaining the original style, the technology of wire rope caulking and reinforcement of brick masonry is proposed. By using a pressure testing machine to conduct bending tests along the joint section of masonry structures, the surface strain field of the masonry structure was obtained using digital image correlation method (DIC), and the failure mode and load displacement curve of the specimens were analyzed. The stress characteristics and collaborative working mechanism of steel wire rope joint reinforcement brick masonry structures under load were studied, and a numerical model of the bending specimens was established based on the experiments. The results show that the steel wire rope joint reinforcement can establish effective interlayer connections in masonry, constrain brick masonry horizontally and vertically, and maintain the integrity of the masonry. After reinforcement, the bending resistance of the masonry structure was significantly improved, and the bearing capacity was increased by 26% and 46% by embedding 2mm and 3mm wire rope, and the deflection corresponding to the peak load was increased by 51% and 77%, respectively, and the brittle failure characteristics were improved. This method can be used for masonry reinforcement and renovation projects that require preservation of appearance in urban renewal.

Keywords :  bent masonry;  wire rope caulking reinforcement;  strain field;  numerical modeling

*基金項(xiàng)目： 國家自然科學(xué)基金  (52278171 ) 。

作者簡介：趙亞軍  (1979—) ,  男 ，博士 ，副教授 ，研究方向：建筑結(jié)構(gòu)加固。 

通信作者：劉   洋  (1998—) ,   男 ，碩士研究生 ，研究方向： 結(jié)構(gòu)工程。

收稿日期：2023- 07- 24