【摘要】：近年來,銅材料因其自身優(yōu)良的性能而被廣泛應(yīng)用于許多領(lǐng)域之中.為研究TU1無氧銅軸心受壓構(gòu)件的整體穩(wěn)定性能,對7個(gè)TU1無氧銅圓管柱試件進(jìn)行了靜力試驗(yàn)研究.試驗(yàn)測量了試件的幾何初彎曲與荷載初偏心.基于試驗(yàn)結(jié)果,分析了該類型構(gòu)件的失穩(wěn)模態(tài),得到了其整體穩(wěn)定承載力,建立了有限元分析模型并對試驗(yàn)結(jié)果進(jìn)行了模擬計(jì)算.研究結(jié)果表明:試件的破壞模態(tài)均為整體失穩(wěn);試件的穩(wěn)定承載力大致遵循隨柱子長細(xì)比增大而減小的規(guī)律;試件的長細(xì)比越大,其卸載后不可恢復(fù)的塑性變形越小;長細(xì)比為55.9~85.6的試件易發(fā)生彈性失穩(wěn),長細(xì)比為22.2~44.8的試件易發(fā)生彈塑性失穩(wěn);有限元分析模型能夠準(zhǔn)確地考慮幾何初始缺陷的影響,計(jì)算結(jié)果與試驗(yàn)結(jié)果吻合良好.
[Abstract]:In recent years, copper materials have been widely used in many fields because of their excellent properties. In order to study the overall stability of TU1 oxygen-free copper axial compression members, static tests were carried out on 7 TU1 oxygen free copper tube column specimens. The geometric initial bending and the initial eccentricity of load were measured. Based on the experimental results, the instability modes of this type of member are analyzed, and its overall stability bearing capacity is obtained. The finite element analysis model is established and the experimental results are simulated. The results show that the failure modes of the specimens are all integral instability, the stable bearing capacity of the specimens follows the law of decreasing with the increase of the slenderness ratio of the columns, the larger the aspect ratio of the specimens, the smaller the unrecoverable plastic deformation after unloading. When the aspect ratio is 55.9 ~ 85.6, the elastic instability is easy to occur, and the elastic-plastic instability is easy to occur when the aspect ratio is 22.2 ~ 44.8. The finite element analysis model can accurately consider the effect of geometric initial defects, and the calculated results are in good agreement with the experimental results.
【作者單位】： 天津大學(xué)建筑工程學(xué)院;清華大學(xué)土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室;武漢大學(xué)土木建筑工程學(xué)院;中國科學(xué)院高能物理研究所;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51678339) 清華大學(xué)自主科研計(jì)劃課題(學(xué)科交叉專項(xiàng))資助項(xiàng)目(20131089288)
【分類號】：TU392.3
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本文編號：2359612