火災作用下鋼筋混凝土托梁轉(zhuǎn)換結(jié)構(gòu)模型變形有限元分析
[Abstract]:By using ABAQUS finite element analysis software, the deformation calculation of the transfer structure model under 8 different fire conditions was carried out by applying the standard temperature rise and vertical load to a transfer structure model with a large space reinforced concrete beam at the bottom of four stories. The relationship between the displacement of bracket and adjacent side column and the standard heating time in the model is analyzed. The results show that with the increase of the standard heating time, the additional deformation is generated on the basis of normal temperature vertical load deformation under different fire conditions. The deflection of the beam at the bottom of the transfer structure model increases rapidly within 60 min of the initial temperature rise, and then slows down gradually. The shape of deflection curve along the direction of the beam span is affected by the location of the fire room. Under the condition of asymmetric fire room layout, the deflection of the beam on the side of the fire room of the model symmetry axis is larger. The deformation of the lateral columns on both sides of the transfer structure model is obviously larger than that of the other floors at the beam position of the floor under fire. When the fire room is arranged only on one side of the symmetry axis of the model, the lateral displacement of the two sides of the column changes dramatically from top to bottom, which shows that in the case of asymmetric fire room arrangement, the transition structure will produce violent interaction.
【作者單位】: 山東建筑大學土木工程學院;東南大學土木工程學院;
【基金】:國家自然科學基金項目(51278289,51478254)
【分類號】:TU375.1;TU352.5
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