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本文以空间刚架为力学模型,对“悬浮式内拉线抱杆”的应力和稳定性进行了全面分析。对于“抱杆”轴向受压、单向和双向偏心受压情况均作了详尽的计算分析。提出“抱杆”截面上的次要内力和应力对“抱杆”局部稳定影响的新论点,并且详尽地计算了“抱杆”的局部稳定性。作者用有限元方法计算“悬浮式内拉线抱杆”时,提出一种新的力学模型,对于全面正确评价“抱杆”有新意,可以作为评价和鉴定“悬浮式内拉线抱杆”的依据。
In this paper, the spatial rigid frame as a mechanical model, the stress and stability of the “suspended inner pull wire” of a comprehensive analysis. For the “pole” axial compression, one-way and bi-directional eccentric compression are made detailed calculation and analysis. The paper puts forward a new argument about the influence of secondary internal forces and stresses on “pole” section on the local stability of “pole”, and calculates the local stability of “pole” thoroughly. When using the finite element method to calculate the “suspended inner cable”, a new mechanical model is proposed, which can be used as a basis for evaluating and appraising the “suspended inner cable” .