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（1 湖南工程學(xué)院建筑工程學(xué)院， 湘潭 411104； 2 同濟(jì)大學(xué)土木工程學(xué)院，  上海 200092）

［摘要］對(duì)配有縱向鋼筋和箍筋的矩形混凝土柱，采用預(yù)應(yīng)力角鋼板進(jìn)行加固，使加固后的混凝土柱在不遭受加固破損的情況下，其承載力得到提高。在統(tǒng)一強(qiáng)度理論的基礎(chǔ)上，對(duì)預(yù)應(yīng)力角鋼板加固混凝土短柱在軸心受壓時(shí)的受力性能進(jìn)行了分析，考慮了角鋼板和箍筋對(duì)混凝土的約束作用，推導(dǎo)出了預(yù)應(yīng)力角鋼板加固混凝土短柱的軸壓承載力計(jì)算公式。分析計(jì)算了原柱的極限承載力、加固柱在施加周向預(yù)應(yīng)力使原柱內(nèi)的箍筋不受力時(shí)和施加周向預(yù)應(yīng)力使角鋼板達(dá)屈服強(qiáng)度時(shí)的承載力。結(jié)果表明，統(tǒng)一強(qiáng)度理論對(duì)于預(yù)應(yīng)力角鋼板加固的配筋混凝土軸壓短柱的理論計(jì)算有非常好的適用性。研究可為預(yù)應(yīng)力角鋼板加固混凝土短柱的軸壓承載力的分析計(jì)算提供理論依據(jù)。

［關(guān)鍵詞］預(yù)應(yīng)力； 統(tǒng)一強(qiáng)度理論； 角鋼板； 混凝土短柱； 軸壓承載力

中圖分類號(hào)：TU378-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)14-0084-06

Analysis on axial compressive bearing capacity of rectangular concrete  short column strengthened with pre-stressed angle steel plate

Ren Zhenhua1,2, Zeng Xiantao1, Qu Wenjun2, Liang Qiao1

(1 School of Civil Engineering,  Hunan Institute of Engineering, Xiangtan 411104, China; 2 College of Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract:The rectangular  concrete column with longitudinal reinforcements and stirrups was strengthened by pre-stressed angle steel plate in order to increase the column′s bearing capacity under the condition of no strengthening damage. Based on unified strength theory, the axial compression performances of  concrete short column strengthened with pre-stressed angle steel plate were analyzed. Considering the constraint function of angle steel plate and the stirrup for the concrete, the formula of axial compressive bearing capacity of concrete short column strengthened with pre-stressed angle steel plate was derived. The ultimate bearing capacity of the original column, the bearing capacity of the strengthened column when the ring tendons were applied in the original column to make the hoop in the original column unloaded, and the bearing capacity of the column with the angle plate reaching yielding bearing capacity by applying the circular pre-stress. The results show that the unified strength theory is very suitable for the theoretical calculation of concrete short column strengthened with pre\|stressed angle steel plate under axial compression. This study provides a theoretical basis for the analysis and calculation of the axial compressive bearing capacity of concrete short column strengthened with pre-stressed angle steel plate.

Keywords:pre-stress; unified strength theory; angle steel plate; concrete short column; axial compressive bearing capacity

*國(guó)家自然科學(xué)基金項(xiàng)目（51478346），湖南省自然科學(xué)基金（2017JJ4016），湖南省教育廳重點(diǎn)項(xiàng)目（16A050），湖南省自然科學(xué)基金項(xiàng)目（2018JJ4042)。

通訊作者：曾憲桃，博士，教授，Email:xtzeng63@163.com。