论文部分内容阅读
塑性计算主要优点是能充分发挥材料的潜力,节省材料用量。本文提出交叉梁系的两种塑性分析方法:荷载分配法及机动法。前者是利用交叉梁系的荷载分配法研究交叉梁系的弹性、弹塑性直到塑性破坏的全过程,从而求得交叉梁系的极限荷载及塑性破坏时各梁的内力。通过用荷载分配法对工程上常用的几种网架的塑性分析,归纳出这几种常用网架的破坏机构的规律。运用这些规律,利用机动法可极其方便地求得交梁系的极限荷载。再利用节点平衡可求得塑性破坏时交叉梁系各梁的内力。
The main advantage of plastic calculations is to fully realize the potential of materials and save material consumption. This paper presents two plastic analysis methods for cross-beam systems: load distribution method and maneuvering method. The former is to study the whole process of elasticity, elastoplasticity and plastic failure of the cross-beam system by using the load distribution method of the cross-beam system, so as to obtain the ultimate load of the cross-beam system and the internal force of each beam during the plastic failure. By using the load distribution method to analyze the plasticity of several kinds of grids commonly used in engineering, the rules of the destruction mechanism of these common grids are summarized. Using these laws, using the maneuvering method can be extremely easy to obtain the ultimate load of the intersecting beam system. By reusing the node balance, the internal forces of the beams of the cross-beam system can be obtained when plastic failure occurs.