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(1湖南大學(xué)土木工程學(xué)院， 長(zhǎng)沙 410082； 2 奧克蘭大學(xué)土木與環(huán)境工程系， 奧克蘭 1023)

［摘要］建立了一個(gè)包含305個(gè)帶端柱或翼緣鋼筋混凝土剪力墻試驗(yàn)數(shù)據(jù)庫(kù)。根據(jù)有無(wú)腹筋、加載方式、破壞類(lèi)型將數(shù)據(jù)篩選分成7類(lèi)，將數(shù)據(jù)庫(kù)與《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》（JGJ 3—2010）中對(duì)應(yīng)的抗剪承載力公式計(jì)算結(jié)果進(jìn)行對(duì)比。結(jié)果表明，對(duì)于帶端柱或翼緣鋼筋混凝土剪力墻，抗剪承載力實(shí)測(cè)值與各抗剪承載力公式計(jì)算值比值的離散性均較大，對(duì)于永久、短暫設(shè)計(jì)狀況下剪壓公式，其鋼筋部分抗剪公式不準(zhǔn)確導(dǎo)致整個(gè)剪壓公式不準(zhǔn)確，而對(duì)于地震設(shè)計(jì)狀況下剪壓公式，混凝土部分抗剪公式不準(zhǔn)確使得整個(gè)剪壓公式計(jì)算結(jié)果的準(zhǔn)確度降低?；谠囼?yàn)數(shù)據(jù)庫(kù)，對(duì)永久、短暫設(shè)計(jì)狀況下剪壓公式的鋼筋部分抗剪公式，地震設(shè)計(jì)狀況下剪壓公式的混凝土部分抗剪公式以及剪跨比不大于2-5斜壓公式進(jìn)行修正，使計(jì)算結(jié)果符合試驗(yàn)規(guī)律。給出適應(yīng)于計(jì)算帶端柱或翼緣鋼筋混凝土剪力墻的抗剪承載力修正公式，將修正公式的計(jì)算值與實(shí)測(cè)值對(duì)比，結(jié)果表明，修正公式的準(zhǔn)確性較高。

［關(guān)鍵詞］帶端柱剪力墻； 鋼筋混凝土； 數(shù)據(jù)庫(kù)； 抗剪承載力； 剪壓破壞

中圖分類(lèi)號(hào)：TU375文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)09-0092-07

Evaluation and analysis of shear capacity of barbell-shaped or flanged reinforced concrete walls based on experimental data

Lu Yiqiu1,2, Huang Liang1

(1  College of Civil Engineering, Hunan University, Changsha 410082, China；2  Department of Civil and Environmental Engineering, The University of Auckland, Auckland 1023, New Zealand)

Abstract:An experimental database was established containing 305 barbell-shaped or flanged reinforced concrete walls. According to the web reinforcement, loading mode and failure type, the data were screened and divided into seven categories. The results of the database were compared with those of the corresponding shear capacity formula in the Technical specification for concrete structures of tall buildings (JGJ 3—2010). The results show that for barbell-shaped or flanged reinforced concrete walls, the ratios of the measured shear capacity to the calculated shear capacity by shear capacity formula are discrete. For diagonal tension failure formulas under permanent and transient design conditions, the shear capacity formula of steel bar part are inaccurate, which results in the whole diagonal tension failure formula. While for diagonal tension failure formulas under seismic design conditions, shear capacity formula of concrete part are inaccurate, which results in the decreased inaccurate calculation results of the whole diagonal tension failure formula. Based on the experimental database, three kinds of formulas were revised to make the calculation results conform to the experimental  law, including the shear capacity formula of steel bar part under permanent and transient design conditions, shear capacity formula of concrete part under seismic design conditions and diagonal compression formula of components with shear-span ratio of no more than 2-5. A revised formula for calculating the shear capacity of barbell-shaped or flanged reinforced concrete walls was given. The comparison between the calculated and measured values shows that the revised formula is accurate.

Keywords:barbell-shaped shear wall; reinforced concrete; database; shear capacity; diagonal tension failure