40m×2双跨预应力混凝土框架梁的设计与施工研究
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(同济大学建筑设计研究院，上海 200092)［摘要］以实际工程为背景，论述了某两跨连续、跨度40m的预应力混凝土框架梁的设计施工过程。设计中采用先铰接后刚接的设计和施工方法，并考虑了大跨预应力混凝土梁可能出现的预应力摩擦损失、振动荷载等方面的影响。通过现场试验验证了设计的可靠性。在施工中通过合理工序及工法使设计中的计算模型与实际结构得以吻合。［关键词］大跨度预应力;摩擦损失;振动荷载;先铰接后刚接Study on Design and Construction of a 40m×2 Prestress Concrete Frame BeamsChao Si,Lin Guanghua，Zhang Zhun(Architectural Design and Research Institute of Tongji University,Shanghai 200092,China)Abstract:Based on a practical building project,the design and construction process of a two span prestress concrete frame beam(40m for each span) are introduced. The design and construction method of rigid connection after hinged connection is adopted, and the possible influences such as prestress friction loss,vibration load on the large-span prestress concrete beams are considered. Some site tests are done to further determine the reliability of the design. Meanwhile,reasonable construction process and methed are applied,so that the actual structure can be consistent with the calculation model.Keywords:large-span prestress structures; friction loss; vibration load; rigid connection after hinged connection作者简介：巢斯，总工程师，教授级高工。参考文献［1］林同炎,伯恩斯.预应力混凝土结构设计［M］.北京：中国铁道出版社，1983.［2］李国平.预应力混凝土结构设计原理［M］.北京：人民交通出版社，2000.［3］薛伟辰.现代预应力结构设计［M］.北京：中国建筑工业出版社，2003.［4］混凝土结构设计规范(GB50010—2002)［S］.［5］预应力混凝土结构抗震设计规程(JGJ140—2004)［S］.［6］建筑工程预应力施工规程(CECS180:2005)［S］.［7］刘永前，张彦兵，王新敏.后张梁管道摩阻损失测试技术与数据处理［J］.中国安全科学学报，2005.
