分析无粘结预应力混凝土梁桥的主要困难，在于构件的截面强度和构件整体变形耦合。
The main difficulty in analysis of unbonded prestressed concrete beam bridge is the coupling between the sectional strength of member and the whole structural deformation of member.
无粘结筋的变形不符合平截面变形假定，因此由外荷载引起的应力计算比较复杂。
The computation of stress resulted by external load is relatively complex because the deformation of unbonded prestressed strand cannot comply with the plane section assumption.
由于无粘结预应力混凝土构件中预应力钢筋与周围混凝土之间可以相对滑动，导致了构件受力和变形不同于有粘结预应力混凝土构件。
Because the reinforcing bar and surroundings concrete can have opposite slip in unbonded prestressed concrete, Lead to stress and deflection differing from bonded prestressed concrete structure.
通过无网格技术，改进了离散元法应变、应力的计算方案，使其能够在连续介质大变形的计算中得到更为准确的应变、应力分布。
Moreover, a new technique for calculating the strain and stress of DEM model has been proposed by using the concept of meshless method.
结果表明，高温无粘结预应力混凝土受弯构件的抗弯承载力和变形有很大的影响。
The results show that high temperature has a great influence on the bending capacity and deformation of the unbonded prestressed RC flexural members.
结果表明，高温无粘结预应力混凝土受弯构件的抗弯承载力和变形有很大的影响。
The results show that high temperature has a great influence on the bending capacity and deformation of the unbonded prestressed RC flexural members.
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