- 摘 要
-
（楊凌職業(yè)技術(shù)學(xué)院建筑工程分院， 楊凌 712100）
［摘要］為研究鋼管混凝土核心柱這一組合柱的軸壓力學(xué)性能，以組成組合柱的鋼管混凝土和管外箍筋約束混凝土兩部分的應(yīng)力-應(yīng)變關(guān)系為基礎(chǔ)，外圍箍筋約束混凝土應(yīng)用Mander本構(gòu)模型，視鋼管混凝土為一種組合材料，基于靜力平衡及變形協(xié)調(diào)，推導(dǎo)了外圍箍筋對其內(nèi)混凝土平均約束應(yīng)力，分析了組合柱軸壓荷載-變形曲線規(guī)律，討論了箍筋約束混凝土峰值應(yīng)變小于以及大于鋼管混凝土屈服應(yīng)變時該柱軸壓承載力，建議了鋼管混凝土核心柱軸壓極限承載力計算方法，經(jīng)與47個試件試驗結(jié)果對比，吻合良好。
［關(guān)鍵詞］鋼管混凝土核心柱； 荷載-變形曲線； 軸壓； 承載力
中圖分類號：TU398文獻標(biāo)識碼：A文章編號：1002-848X(2017)19-0093-04
Analysis on axial compression ultimate bearing capacity of concrete-filled steel tubular composite column
Liu Jie
(Department of Architectural Engineering， Yangling Vocational and Technical College， Yangling 712100, China)
Abstract:In order to study the axial compressive mechanical properties of concrete-filled steel tubular composite columns, based on the stress-strain relationship between the concrete-filled steel tube and external concrete confined with stirrups, Mander constitutive model was adopted for external concrete confined with stirrups, and the concrete-filled steel tube was regarded as a kind of composite material. Based on the static balance and deformation coordination, the average restraint stress of the concrete by external stirrups was deduced, and the axial compression load-deformation curve law of the composite column was analyzed. The axial compression ultimate bearing capacity of the column was discussed when the peak strain of the concrete constrained by stirrups is less than and greater than that of the concrete-filled steel tube. The calculation method of the axial compression ultimate bearing capacity of concrete-filled steel tubular composite column was proposed, and the results were in good agreement with the test results of 47 specimens.
Keywords:concrete-steel tubular composite column; load-deformation curve; axial compression; bearing capacity
*陜西省教育廳2017年專項科學(xué)研究（17JK0880）。
作者簡介：劉潔，碩士，副教授，Email：liu712100@163.com。
