And numerical example is adopted to explain the influence of external prestress to the vibration frequency and modality for simple beam.
通过数值算例验证了体外预应力对简支梁桥振动频率和振动模态的影响。
The engineering situation of Nanyang river bridge is introduced and the idea of adopting external prestress vertical tension method to reinforce t beam and design principle are proposed.
介绍了南洋河大桥的工程概况，并根据桥的使用状况提出了采用体外预应力竖向张拉法来加固旧T梁的设计构想和应遵循的设计原则。
The engineering situation of Nanyang river bridge is introduced and the idea of adopting external prestress vertical tension method to reinforce t beam and design principle are proposed.
介绍了南洋河大桥的工程概况，并根据桥的使用状况提出了采用体外预应力竖向张拉法来加固旧T梁的设计构想和应遵循的设计原则。
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