摘要
结合实际工程的特点,对地处地震高烈度区的跨度分别为7.5m和8.7m的钢筋混凝土悬挑梁结构,采用了有粘结预应力技术,较好地解决了悬挑梁的结构受力问题和梁的变形、挠度控制问题。主要介绍了预应力悬挑梁的结构设计计算和配筋情况,同时对悬挑梁的控制参数、内力计算、抗裂验算、变形验算和抗震验算等提出了设计建议。
Based on the engineering,the problem of structural load carrying capacity and deformation,deflection for the large-span cantilever beam(7.5m and 8.7m) in high seismic intensity areas were solved and controlled by using bonded prestressed concrete structure.The design calculation methods and construction measures of prestressed concrete cantilever beam were introduced.Meanwhile,some recommendations were provided about the choice of control parameters,calculation of structural mechanics,checking computation of crack resistance,deformation analysis and the seismic design for the cantilever beam.
引文
[1]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[2]GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[3]JGJ 140—2004预应力混凝土结构抗震设计规程[S].北京:中国建筑工业出版社,2004.