研究表明：非预应力高性能混凝土梁具有良好的抗震性能，中等预应力度的高性能混凝土梁也具有较好的抗震性能。
Studies showed that non prestressed high performance concrete (HPC) beams had good seismic performance, and prestressed HPC beams also had better seismic performance.
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.
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.
本文以杭州湾跨海大桥北航道非通航孔桥为工程背景，对大跨度预应力混凝土箱梁锚固区混凝土的应力应变分布特征进行了分析研究。
A study of the stress and strain distribution of anchorage zone in a long span PC box girder was undertaken in the background of Hangzhou Bay Bridge project.
同时本文针对非预应力FRP筋混凝土存在较大裂缝和挠度的特性进行了预应力FRP筋混凝土梁的抗弯性能的试验研究和理论分析。
There is another experimental study and theoretical analysis on flexural behavior of concrete beams prestressed with FRP reinforcement in this dissertation's.
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.
在拉杆拱体系中，梁底预应力筋和非预应力筋成为主要的受拉部分，拉杆上方成为低应力区。
In this system, the steel wires and steel bars are the main parts that bear the tensile force, the stress in the district above the dragging bar is low.
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.
试验结果表明，随着受拉区非预应力筋配筋率和预应力筋配筋率的增大，梁的延性逐渐减小；
The experimental results show that the ductility of the beams decreases gradually with the increasing of non prestressed and prestressed reinforcement index in the strained zone;
试验结果表明，随着受拉区非预应力筋配筋率和预应力筋配筋率的增大，梁的延性逐渐减小；
The experimental results show that the ductility of the beams decreases gradually with the increasing of non prestressed and prestressed reinforcement index in the strained zone;
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