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基于钢材以及岩体材料的弹塑性本构模型理论,建立底座与底板接触耦合分析模型,进行了底座应力以及底板比压的影响因素分析。计算结果表明,底板的比压分布并不均匀,柱窝下方的接触反力最大,两侧逐渐减小,偏向外侧主肋附近的接触反力大于内侧主肋,无主肋位置处的接触反力最小,可以认为底座与底板的相对刚度比是影响比压分布的主要因素。在较软的底板上,底座比压呈梯形分布,可以按塑性底板假设进行计算;在较硬的底板上,比压在立柱作用处达到最大,与按塑性假设计算得到的分布截然不同。在进行底座设计与选型时,应区分软硬底板,选用适当的分析方法按弹性底板或塑性底板分别进行考虑。
Based on the elasto-plastic constitutive model theory of steel and rock mass materials, a contact-coupling analysis model between the base and the base was established, and the influencing factors of the base stress and the base pressure were analyzed. The calculation results show that the pressure distribution of the bottom plate is not uniform, the contact reaction force under the pits is the maximum, the two sides are gradually reduced, the contact reaction force near the outer main ribs is greater than the main ribs, The minimum force, it can be considered that the relative stiffness of the base and the floor ratio is the main factor affecting the pressure distribution. On softer substrates, the pedestal has a trapezoidal distribution of specific pressures, which can be calculated on the assumption of a plastic substrate; on a harder substrate, the maximum effect is greater than the pressure on the column, distinctly different from the distribution calculated by plastic assumption. During the base design and selection, should distinguish between hard and soft floor, use the appropriate analysis method according to the elastic floor or plastic floor were considered.