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(1 重慶交通大學(xué)土木工程學(xué)院, 重慶 400074; 2 浙大寧波理工學(xué)院土木建筑工程學(xué)院, 寧波315100; 3 新加坡南洋理工大學(xué)土木與環(huán)境工程學(xué)院, 新加坡 639798)

摘要: 工字形鋼筋混凝土剪力墻因具有較高的承載力與剛度,被廣泛運用于建筑結(jié)構(gòu)抗震設(shè)計之中。 有效剛度對于鋼筋混凝土剪力墻的抗震性能有著重要影響。 利用有限元軟件 DIANA 對擬靜力加載下工字形鋼筋混凝土剪力墻進(jìn)行研究,分析了翼緣寬度、軸壓比、剪跨比、腹板縱筋強(qiáng)度、翼緣縱筋配筋率對有效剛度的影響。 結(jié)果表明,工字形鋼筋混凝土剪力墻的有效剛度折減系數(shù)隨著翼緣寬度、腹板縱筋強(qiáng)度的增加而減小,隨著軸壓比、剪跨比的增大而增大,翼緣縱筋配筋率影響不大。 提出了適用于工字形鋼筋混凝土剪力墻有效剛度的計算公式,其計算結(jié)果貼合試驗值,說明該公式準(zhǔn)確度較高,可用于計算工字形鋼筋混凝土剪力墻的有效剛度。

關(guān)鍵詞: 工字形鋼筋混凝土剪力墻; 有效剛度; DIANA; 翼緣寬度; 軸壓比; 剪跨比; 腹板縱筋強(qiáng)度; 翼緣縱筋配筋率

中圖分類號:TU375 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)13-0112-08

DOI:10. 19701 / j. jzjg. 20201026

Study on effective stiffness of H-shaped reinforced concrete shear wall

YU Lei1, MA Jiaxing2, WANG Yinhui1,2, LI Bing3

(1 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;2 School of Civil Engineering and Architecture, Ningbo Tech University, Ningbo 315100, China;3 School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore)

Abstract: H-shaped reinforced concrete shear wall is widely used in seismic design of building structures, owning to the high bearing capacity and stiffness. The effective stiffness has an important effect on the seismic performance of reinforced concrete shear wall. The finite element software DIANA was used to study H-shaped reinforced concrete shear wall under quasi-static loading, and the effects of flange widths, axial load ratios, shear span ratios, stresses of vertical web reinforcement and vertical flange reinforcement ratios on effective stiffness were analyzed. The result show that the effective stiffness ratio of H-shaped structural walls decreases with the raise of flange width and stresses of vertical web reinforcement, and increases with the growth of axial load ratios and shear span ratios, and vertical flange reinforcement ratios has little effect. An equation was specifically developed for the effective stiffness of H-shaped structural walls, which showed a good agreement with experimental results, indicating that the formula has high accuracy and can be used to calculate the effective stiffness of H-shaped reinforced concrete shear walls.

Keywords:H-shaped reinforced concrete shear wall; effective stiffness; DIANA; flange width; axial load ratio; shear span ratio; stress of vertical web reinforcement; vertical flange reinforcement ratio