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绪论钢结构的予应力概念,显然取诸钢筋混凝土建筑的经验,即个别的受拉构件、或整个结构用高强度的钢缆进行予压,钢缆在张拉状态下固结于基体结构上。结果在基体结构的构件中产生了与外部荷载所产生之应力方向相反的初应力,而在钢缆张拉后作用的荷载,就由基体结构和钢缆共同承受。结构的予应力,可以大大地降低金属的总消耗量。其所获致的经济效果取决于两种因素:第一,采用钢缆,能够用高机械性能指标的钢料局部地代替普通软钢,这就可以
Introduction The concept of the prestressing of steel structures is obviously based on the experience of reinforced concrete buildings, that is, the individual tension members or the entire structure are prestressed with high-strength steel cables, and the steel cables are consolidated on the base structure under tension. . As a result, initial stresses are generated in the components of the base structure in opposition to the stresses generated by the external loads, and the loads acting after the tensioning of the cable are shared by the base structure and the steel cable. The structural prestress can greatly reduce the total metal consumption. The economic effect achieved depends on two factors. First, steel cables can be used to locally replace ordinary mild steel with high mechanical properties.