- 摘 要
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(東南大學土木工程學院， 南京 211189)
摘要: 為了研究預應力鋼板帶加固磚砌體墻的抗剪性能，以橫向鋼板帶間距、橫向鋼板帶的預應力水平以及砂漿強度為參數(shù)，共完成了 1 片未加固磚砌體墻和 4 片預應力鋼板帶加固磚砌體墻的單調水平加載試驗。 試驗結果表明:加固試件的開裂荷載和峰值荷載均明顯得到提高；當橫向鋼板帶的預拉應力水平合適時，隨著橫向鋼板帶間距的減小，加固試件的峰值位移和峰值荷載均得到提高，但彈性側向剛度變化不大；提高砂漿強度，加固試件的變形能力降低，但彈性側向剛度和峰值荷載有所提高。 建議橫向鋼板帶的有效預拉應力控制參數(shù)不超過 0. 024。
關鍵詞: 預應力； 鋼板帶； 磚砌體墻； 抗剪性能； 單調加載試驗中圖分類號:TU398+.9 文獻標志碼:A 文章編號:1002￣848X(2022)04￣0130￣06
DOI:10. 19701 / j.jzjg.20200431
Experimental study on shear resistance behavior of brick masonry walls strengthened bypre￣stressed steel strips
JING Denghu， SHI Yun， LÜ Beiyun， CAO Shuangyin
(School of Civil Engineering， Southeast University， Nanjing 211189， China)
Abstract: In order to study the shear resistance behavior of brick masonry walls strengthened by pre￣stressed steel strips，one unreinforced brick masonry wall and four brick masonry walls strengthened by pre￣stressed steel strips were tested undermonotonic horizontal loads， considering spacing of the transversal steel strips， pre￣stress level in the transversal steel stripsand the strength grade of mortar as research parameters. Test results show that both the cracking load and peak load of thestrengthened specimens are significantly increased. When the pre￣tension stress level of the transverse steel strips isappropriate， with the decrease of the spacing of the transverse steel strips， the peak displacement and peak load of thestrengthened specimens are improved， however the elastic lateral stiffness hardly changes. By increasing the mortarstrength， the deformation capability of the strengthened specimens is reduced， but the elastic lateral stiffness and peak loadis increased. It is recommended that the control parameter of the effective pre￣tension stress in the transverse steel stripshould not exceed 0. 024.
Keywords:pre￣stress； steel strip； brick masonry wall； shear resistance behavior； monotonic loadi
∗江蘇省自然科學基金項目(BK20171361)。
第一作者:敬登虎，博士，副教授，主要從事工程結構的檢測、鑒定與加固改造研究，Email: jingdh@ seu.edu.cn。
[引用本文] 敬登虎，石運，呂北云，等. 預應力鋼板帶加固磚砌體墻抗剪性能試驗研究[ J]. 建筑結構，2022，52(4):130￣135. JING Denghu， SHI Yun， LÜ Beiyun， et al. Experimental study on shear resistance behavior of brickmasonry walls strengthened by pre￣stressed steel strips[J]. Building Structure，2022，52(4):130￣135.
