【摘要】：基于ABAQUS有限元軟件,選取合理的材料本構模型,建立溫度和荷載耦合作用下型鋼混凝土約束柱有限元模型,有限元模型的計算值與已有試驗結果吻合較好。利用上述模型考慮荷載比和荷載偏心率的影響,對不同軸向約束和轉動約束作用下的型鋼混凝土約束柱的耐火性能進行系統(tǒng)的參數分析。結果表明:軸向約束相當于豎向約束彈簧,在一定程度上分擔柱頂豎向荷載,有利于提高柱的耐火極限;轉動約束相當于轉動約束彈簧,在一定程度上減小彎矩沿柱長的分布值,同時也阻止柱半高處的側向變形;軸向約束作用或軸向約束和轉動約束共同作用下,荷載比相同且小于或等于0.6時,柱的耐火極限隨偏心率的增大而增大,偏心率相同時,柱的耐火極限隨荷載比的增大而減小。
[Abstract]:Based on the ABAQUS finite element software, the finite element model of SRC confined column under the coupling of temperature and load is established by selecting a reasonable material constitutive model. The calculated value of the finite element model is in good agreement with the experimental results. Taking into account the influence of load ratio and load eccentricity, the fire resistance of SRC confined columns under different axial and rotational constraints is systematically analyzed. The results show that axial constraint is equivalent to vertical constraint spring, sharing vertical load on the top of cylinder to a certain extent, which is beneficial to increase the fire resistance limit of column, and rotation constraint is equivalent to rotational constraint spring. The distribution value of bending moment along the length of column is reduced to some extent, and the lateral deformation of the column is prevented at the same time. When the load ratio is the same and is less than or equal to 0.6, the axial constraint or the combined action of axial constraint and rotation constraint, The fire resistance limit of the column increases with the increase of eccentricity. When the eccentricity is the same, the fire resistance limit of the column decreases with the increase of load ratio.
【作者單位】： 中國建筑科學研究院;建設部防災研究中心;
【基金】：中國建筑科學研究院自籌基金項目(20150111331030079,20140111330730062)
【分類號】：TU398.9;TU352.5

【相似文獻】

相關期刊論文 前10條

1 朱s，

本文編號：2217276