X形配筋及鋼骨增強混凝土異形柱邊節(jié)點受力性能*
李艷艷1，張超2，張健新1，李和慶3
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（1 河北工業(yè)大學(xué)土木工程學(xué)院，天津 300401； 2 河北農(nóng)業(yè)大學(xué)城鄉(xiāng)建設(shè)學(xué)院，保定 071001；3 中國石油天然氣管道工程有限公司，廊坊 065000）
［摘要］對X形配筋增強、T形鋼骨增強、槽形鋼骨增強的混凝土異形柱邊節(jié)點進行擬靜力試驗，研究混凝土異形柱邊節(jié)點核心區(qū)的箍筋應(yīng)變規(guī)律、混凝土應(yīng)變規(guī)律、破壞特征及滯回曲線，分析X形配筋、T形鋼骨、槽形鋼骨對混凝土異形柱邊節(jié)點受力性能的影響。結(jié)果表明：混凝土異形柱邊節(jié)點核心區(qū)不同位置處箍筋應(yīng)變相差比較大，邊節(jié)點核心區(qū)中與剪力方向平行的腹板箍筋應(yīng)變大于與剪力方向垂直的腹板箍筋應(yīng)變和翼緣處的箍筋應(yīng)變，在混凝土異形柱邊節(jié)點核心區(qū)加入X形配筋、T形鋼骨或槽形鋼骨能夠提高混凝土異形柱邊節(jié)點核心區(qū)混凝土的主拉應(yīng)變，改善異形柱邊節(jié)點的破壞形態(tài)及滯回性能。［關(guān)鍵詞］異形柱; 邊節(jié)點; 受力性能; X形配筋; 鋼骨中圖分類號：TU398+.9 文獻標識碼：A 文章編號：1002-848X(2016)04-0040-05
Mechanical behavior of exterior joints of specially shaped concrete columns reinforced by X-shaped reinforcement and steelLi Yanyan1, Zhang Chao2, Zhang Jianxin1, Li Heqing3(1 School of Civil Engineering, Hebei University of Technology, Tianjin 300401, China; 2 Institute of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China; 3 China Petroleum Pipeline Engineering Corporation, Langfang 065000, China)Abstract:The exterior joints of specially shaped concrete columns reinforced with X-shaped reinforcement, T-shaped steel and groove-shaped steel were tested under low cyclic loading. The stirrup strain variation, concrete strain variation, damage characteristic and hysteretic curve in the core area of exterior joints of specially shaped concrete columns were studied. The effect of X-shaped reinforcement, T-shaped steel and groove-shaped steel on mechanical behavior of exterior joints of specially shaped concrete columns were analyzed. The result shows that the stirrup strain in different position of the core area of exterior joints of specially shaped concrete columns reinforced varies widely. The stirrup strain in parallel to shear force in web of exterior joints is much higher than those in perpendicular to shear force in web and in the flange. The concrete tensile strain of exterior joints of specially shaped concrete columns reinforced by X-shaped reinforcement, T-shaped steel and groove-shaped steel is enhanced, the damage characteristic and hysteretic characteristic are improved.Keywords:specially shaped column; exterior joint; mechanical behavior; X-shaped reinforcement; steel
*河北省自然科學(xué)基金資助項目（E2015202035），河北省建設(shè)科學(xué)技術(shù)研究計劃（2014-123），河北省高等學(xué)?？茖W(xué)技術(shù)研究重點項目（ZD2010123）。作者簡介：李艷艷，博士，副教授，碩士生導(dǎo)師，Email：nicole_820@163.com。
