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一、力的概念力,分为内力和外力。外力称荷载或反力。构件在外力的作用下,内部各部分之间产生相应的作用力,这种力就称为构件的内力。构件计算时,一定要确保构件能安全承受荷载,这就要考虑构件的强度、刚度和稳定。为了保证构件正常使用,还必须使各个构件的变形限定在正常工作许可的范围内。
First, the concept of force, divided into internal forces and external forces. External forces called load or reaction force. Under the action of external forces, the components produce corresponding forces between the internal parts. This force is called the internal force of the component. When calculating a component, it must be ensured that the component can safely bear the load, which takes into account the strength, stiffness and stability of the component. In order to ensure the normal use of the components, the deformation of each component must also be limited to the scope of the normal work permit.