本欧洲标准中所考虑应用的预应力是高强度钢材(钢丝，钢绞线或钢柱)制造的钢筋束。
P The prestress considered in this Eurocode is applied by tendons made of high-strength steel (wires, strands or bars).
针对工程实践中常用的预应力钢束布置形式，推导了预应力钢筋回缩影响长度的数值解法和预应力等效荷载的一般计算式。
Based on the general case of tendons used in practice, the formulas for calculating the extent owing to the anti-friction effects and the prestressing equivalent loads are derived.
现有有限元数值分析方法在单元划分时，要求预应力钢筋单元与混凝土单元节点必须重合，这对曲线布束的箱梁很难满足这一要求。
Generated a finite element mesh in existence numerical method, node superposition of concrete and reinforcement element is difficult to curved tendon box girder.
在建模过程中，采用三维实体和杆单元相结合的形式，用三维实体单元模拟钢筋混凝土，用杆单元模拟预应力钢束和斜拉索。
It USES 3-d solid element to reinforced concrete and link element to pre-stressed and cable in the course of building model.
分析了导致底板崩裂的主要原因，主要包括跨中合龙束张拉时产生的径向力作用、非预应力钢筋构造因素及施工影响等；
The main causes of bottom flat crack are analyzed, mainly including radial force generated by closure strands stretching in middle span , non-structural elements and construction effects , etc.
分析了导致底板崩裂的主要原因，主要包括跨中合龙束张拉时产生的径向力作用、非预应力钢筋构造因素及施工影响等；
The main causes of bottom flat crack are analyzed, mainly including radial force generated by closure strands stretching in middle span , non-structural elements and construction effects , etc.
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