部分预应力混凝土梁中的非预应力钢筋在反复运行荷载作用下承受交变应力。
The non—prestressed steel bars in ppc beams endure alternate stress under the repeated service loading.
本文提出了一种利用弯矩图快速确定框架梁中预应力钢筋和非预应力钢筋的方法。
This paper makes an exhaushve study of maximum bending moment for beam to bear moving load, and putsforwrt its method and step to determine it.
并且为使非预应力钢筋具有与预应力纤维塑料筋匹配的防腐性能，采用先进的环氧涂层钢筋作为非预应力筋。
In order to enhance the corrosion resistance of steel bars, the epoxy coated ones are used as non-prestressing reinforcement.
此外，由于梁纵向有非预应力钢筋和预应力钢筋，且拉、压区用钢量不同，所以钢筋约束不同，对梁的挠度影响较大。
Moreover, due to the non prestressed steel and prestressed steel, and the different amount of using steel in pulling and pressing areas, so the restrain of steel is different.
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.
试验结果表明，与非预应力碳纤维布加固梁相比，预应力碳纤维布加固后混凝土梁中受拉钢筋应力幅显著降低，混凝土梁疲劳寿命明显延长。
Experimental results show that the stress amplitude of the tensioned bar is decreased remarkably and the fatigue life is then obviously increased as compared to normal strengthening method.
研究以碳纤维筋为无粘结预应力筋和环氧涂层钢筋为非预应力筋的部分预应力混凝土梁的受弯性能。
Based on the existing test results, the calculation method of the closing stresses and closing moments in partially prestressed concrete beams has been discussed.
研究以碳纤维筋为无粘结预应力筋和环氧涂层钢筋为非预应力筋的部分预应力混凝土梁的受弯性能。
Based on the existing test results, the calculation method of the closing stresses and closing moments in partially prestressed concrete beams has been discussed.
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