帶約束拉桿方形鋼管混凝土短柱恢復力模型研究*
王英濤1, 蔡健2, 龍躍凌3, 陳慶軍2
- 摘 要
-
（1 華南理工大學土木與交通學院， 廣州 510641； 2 華南理工大學亞熱帶建筑科學國家重點實驗室， 廣州 510641；3廣東工業(yè)大學土木與交通工程學院， 廣州 510006）
［摘要］為研究帶約束拉桿方形鋼管混凝土短柱的恢復力特性，進行了2個不帶約束拉桿和8個帶約束拉桿方形鋼管混凝土短柱試件在低周反復荷載作用下的試驗研究?；贠penSees纖維截面建立帶約束拉桿方形鋼管混凝土短柱的纖維模型，并對其滯回性能進行計算，數(shù)值分析結果與試驗結果吻合較好，在模型得到驗證的基礎上，進一步考慮了軸壓比、鋼管壁厚、混凝土抗壓強度、鋼管屈服強度、約束拉桿間距、長細比等因素對骨架曲線的影響，基于分析結果，回歸分析得出帶約束拉桿方形鋼管混凝土短柱的恢復力模型。結果表明：在研究參數(shù)范圍內提出的恢復力模型與試驗結果吻合較好。［關鍵詞］方形鋼管混凝土短柱; 約束拉桿; 恢復力模型; 纖維模型; OpenSees軟件中圖分類號：TU317.1，TU398.9 文獻標識碼：A 文章編號：1002-848X(2015)20-0034-06
Research on the restoring force model of square concrete-filled tubular stub columns with binding barsWang Yingtao1, Cai Jian2, Long Yueling3, Chen Qingjun2(1 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China; 2 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China; 3 School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China)Abstract: In order to study the restoring force characteristics of square concrete-filled tubular (CFT) stub columns with binding bars, two square CFT stub columns without binding bars and eight square CFT stub columns with binding bars were carried out subjected to low constant compression and cyclic lateral load. The fiber model of the square CFT stub columns with binding bars was built based on the fiber section in OpenSees software, and the hysteretic behavior was calculated. The simulated hysteretic curves show good agreement with the experimental ones. Then, the influences of axial compression ratio, thickness of steel tube, concrete compressive strength, yield strength of steel tube, spacing of binding bars and slenderness ratio on the resilience model of skeleton curves were discussed. The restoring force model of square concrete-filled tubular stub columns with binding bars was given based on the regression analysis. The results of hysteretic cures from the suggested model show good agreement with the experimental results.Keywords: square concrete-filled tubular stub column; binding bar; restoring force model; fiber model; OpenSees software
*國家自然科學基金項目（51008085）,亞熱帶建筑科學國家重點實驗室研究項目（2011ZC25，2013ZC14，2013ZC19）,廣州市珠江科技新星專項（2012J2200100）,中央高?；究蒲袠I(yè)務費專項資金資助（2014ZZ0026）,中國博士后基金資助項目（2012M511810，2014T70807）。作者簡介：王英濤，博士研究生，Email:scutwyt@163.com。
