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预弯预应力混凝土梁自1951年在比利时开始使用以来,目前已在许多国家广泛地应用在房屋结构、码头、港口、地下建筑及桥梁结构中。我国也已开始研究并用于工程实践。1987年同济大学桥梁系已对预弯预应力混凝土梁的设计理论作了深入研究,并对一组跨径为4.0 m的试验梁进行制作和试验。为了进一步完善设计理论,摸索出一套适合我国国情的施工方法,我段与同济大学合作,在完成单梁试验的基础上,于1991年8月在大交通量的干线公路上建成了一座2×15m跨径的预弯预应力混凝土简支梁桥。经实桥加载试验表明,试验桥的设
Pre-bent prestressed concrete beams have been used in Belgium since 1951 and are now widely used in many countries for building structures, piers, harbors, underground structures and bridge structures. My country has also begun to study and apply it to engineering practice. In 1987, the bridge department of Tongji University has made an in-depth study on the design theory of pre-bent prestressed concrete beams and produced and tested a set of test beams with a span of 4.0 m. In order to further improve the design theory, to explore a set of construction methods suited to China’s national conditions, I section and Tongji University, completed the single-beam test on the basis of August 1991 in the large traffic volume trunk highway built a 2 × 15m span pre-bent prestressed concrete simply supported beam bridge. The real bridge loading test shows that the test bridge set