本文關(guān)鍵詞： 鋼筋混凝土柱 纖維增強(qiáng)混凝土 擬靜力試驗 損傷容限 變形能力　出處：《建筑結(jié)構(gòu)學(xué)報》2014年02期 　論文類型：期刊論文

【摘要】：為了提高鋼筋混凝土柱的抗震性能,考慮在其潛在的塑性鉸區(qū)采用纖維增強(qiáng)混凝土(FRC)代替普通混凝土。設(shè)計6個剪跨比為3、柱內(nèi)箍筋配置較少的鋼筋混凝土柱試件,其中5個試件的潛在塑性鉸區(qū)采用了FRC,另外1個試件的潛在塑性鉸區(qū)未采用FRC,并對其進(jìn)行擬靜力試驗。通過改變FRC區(qū)高度和強(qiáng)度以及柱軸壓比,觀測試件在低周反復(fù)水平荷載作用下的裂縫開展和破壞過程,研究其滯回特性、變形能力及耗能能力。結(jié)果表明,與普通鋼筋混凝土柱相比,塑性鉸區(qū)采用FRC且柱內(nèi)箍筋配置較少的柱,其破壞形態(tài)為縱向受力鋼筋屈服后的剪切破壞,具有較好的變形能力和損傷容限;在材料強(qiáng)度、柱軸壓比不變時,FRC區(qū)高度增加1倍,位移延性系數(shù)、極限位移角分別提高45%和21%,耗能能力提高81%;局部使用FRC可以減少約束箍筋和抗剪箍筋用量。
[Abstract]:In order to improve the seismic behavior of reinforced concrete columns, fiber reinforced concrete (FRC) is used to replace ordinary concrete in its potential plastic hinges. Six specimens of reinforced concrete columns with a shear span ratio of 3 and less stirrups in columns are designed. The potential plastic hinge region of five specimens is FRC, while the other one is not, and the pseudostatic test is carried out. By changing the height and strength of the FRC zone and the axial compression ratio of the column, The crack development and failure process of the specimens under low cyclic cyclic horizontal load are studied. The hysteretic characteristics, deformation capacity and energy dissipation capacity of the specimens are studied. The results show that, compared with ordinary reinforced concrete columns, In the plastic hinge region, the column with less stirrups in the column has good deformation capacity and damage tolerance due to shear failure after the longitudinal stress of the steel bar yields, and the height of the column increases twice when the axial compression ratio of the column is constant, and the deformation capacity and damage tolerance of the column are better when the axial compression ratio of the column is constant. The displacement ductility coefficient and ultimate displacement angle are increased by 45% and 21, respectively, and the energy dissipation capacity is increased by 81.The local use of FRC can reduce the amount of confined stirrups and shear stirrups.
【作者單位】： 西安建筑科技大學(xué)土木工程學(xué)院;中國石油工程建設(shè)公司華東設(shè)計分公司;
【基金】：國家自然科學(xué)基金項目(51278402,51078305) 長江學(xué)者和創(chuàng)新團(tuán)隊發(fā)展計劃資助項目(PCsIRT) 西安建筑科技大學(xué)“混凝土結(jié)構(gòu)體系抗震與災(zāi)變控制”創(chuàng)新團(tuán)隊基金項目
【分類號】：TU377;TU352.11

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 高淑玲;徐世p，

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