本文着重介绍了中等跨径桥梁采用部分预应力砼技术研制设计低高度高效空心板梁的要点、方法及试验研究的主要成果。

本文讨论了目前已建道路桥梁运营、养护和管理中所面临的问题、现状，对未来的桥梁运营、养护和管理的发展及研究提出了新思路，并就有关的关键技术进行了研究和阐述。

本文根据鄱阳湖口大桥斜拉索塔构造及预应力束布置的特点，设计了索塔节段足尺模型试验方案，给出了空间分析的一些主要成果及与试验实测值的比较，得到了许多重要结论。其设计建议对湖口大桥的建设具有重要的指导作用。

With the fast development of testing techno logy and bridge design and analysis theory, it has great theoretical meaning and practical value to research and explore the method of detecting bridge structural damages, locations and established a health monitoring and evaluation manage ment system of cable-stayed bridge. It prevents occurrence of structural disaster damage and protects structure safe to use. Based on the cable-stayed bridge in the Wenhui road of Hangzhou, a health monitoring and evaluation management system (HMEMS) of cable-stayed bridge is presented and established. Spatial analysis of the cable-stayed bridge by using a large structure FEM analysis program is explored. The method of detecting bridge structural damages and the comprehensive evaluation of the bridge condition are put forward. The corresponding field-testing is made. The results show there is good agreement between the values predicted by the presented system and the field-testing values. The validity of the bridge health monitoring and evaluation management system is further verified.

以江山市城中大桥为工程背景，借助于大型通用空间分析有限元程序，对钢管混凝土拱桥的稳定性进行研究，给出了特征值稳定性分析和非线性稳定性分析，特征值稳定性分析中，研究了横向风撑、X撑以及吊杆非保向力对稳定性的影响，非线性稳定性分析中，分别进行了考虑几何非线性稳定性分析和双重非线性稳定性分析，分析结果对钢管混凝土拱桥的设计具有一定的参考价值。