prestressed main beam

The main difficulty of stress analysis of unbonded partially prestressed concrete beam is how to determine unbonded tendons stress.

使用荷载下无粘结部分预应力混凝土梁应力分析的主要困难，是如何确定无粘结预应力筋的应力。

The prestressed steel bar is drawn when there is uniform temperature of the main beam body, so that the prestress loss can be decreased.

在梁体温度均匀时张拉预应力钢束，可减少结构的预应力损失。

With its excellent section characters, the prestressed concrete box beam plays a main role in the girder bridge.

预应力混凝土箱梁以其优良的截面性质在梁桥中占据了主要地位。