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王新玲¹，牛學(xué)嬌¹，黃小許²
(1 鄭州大學(xué)土木工程學(xué)院，鄭州450002; 2 華南理工大學(xué)建筑特種工程公司，廣州510641)

[摘要] 針對(duì)柱身已開(kāi)裂、柱底固定端己形成塑性鉸的嚴(yán)重?fù)p傷的4個(gè)鋼筋混凝土柱，提出采用沿柱高粘貼CFRP布箍和底部固定端反貼角鋼的共同加固新方法，可以達(dá)到既加固鋼筋混凝土柱身，又使柱底重新成為固定端的目的。然后，對(duì)已進(jìn)行加固的4根柱進(jìn)行模擬地震作用的水平低周反復(fù)荷載試驗(yàn)，研究不同肢長(zhǎng)和肢厚的角鋼對(duì)加固試件抗震性能的影響?；谠囼?yàn)結(jié)果，分析了各試件的裂縫發(fā)展和抗震能力；繪出了試件的滯回曲線和骨架曲線。結(jié)果表明，CFRP布和角鋼共同加固的損傷鋼筋混凝土柱，其抗震能力隨著角鋼肢長(zhǎng)的增加而增大；角鋼厚度的變化對(duì)其承載力提高無(wú)影響；共同加固后的柱具有良好的抗震性能。
[關(guān)鍵詞] 損傷鋼筋混凝土柱；CFRP布和角鋼復(fù)合加固；抗震性能；水平低周反復(fù)荷載

Experimental analysis on seismic behavior ofinjury RC column strengthened with CFRP sheets and angle steel
Wang Xinling¹, Niu Xuejiao¹, Huang Xiaoxu²
(1 College of Civil Engineering, Zhengzhou University, Zhengzhou 450002, China; 2 Special Engineering Co., South China University of Technology, Guangzhou 510641, China)

Abstract: The new method that composited strengthened by CFRP hoops along the columns and angle steels at the end of the columns was advanced for serious injury 4 R.C columns with crack and plastic hinges at the end. Then, the experiments were done under low-cyclic and repeated load for the strengthened columns. The seismic performances of the strengthened columns about different limb length and limb thick of angles steel were studied. Based on test results, the cracks development and the anti-seismic capacity of the specimens were analyzed, and the skeleton curve and hysteresis curve of the sample were drawn out. The results show that the injury RC columns are composited strengthened by CFRP hoops and angle steels with a better capacity. The longer angle steel's limb is, the higher the capacity of the composited strengthened columns is.But it didn't influence for the limb's thickness. The columns composited strengthened possess a good seismic performance.
Keywords: injury RC columns; composite strengthened by CFRP sheets and angle steel; seismic performance; low-cycle and repeated load