顾渭建¹，  冯  丽²，  王  静¹，  张  鏖¹，周淑玲¹
  （1 总参工程兵第四设计研究院，北京 100850； 2 北京建筑工程学院，北京 100044）

[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。
[关键词] 大跨度；悬挑梁；预应力结构；结构设计
中图分类号：TU378.2    文献标识码：A  文章编号：1002-848X(2012) Sl-0154-03

Structural design of large-span reinforced concrete cantilever beam in high intensity areas
Gu Weijian¹,  Feng Li²,  Wang Jing¹,  Zhang Ao¹,  Zhou Shuling¹
(1 The 4^th Engineering Design & Research Academy, General Staff, PLA, Beijing 100850, China; 2 Beijing University of Civil Engineering and Arclutecture, Beijing 100044, China)

Abstract: Based on the engineering,the problem of structuralload 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 mecharucs, checking computation of crack resistance, deformation analysis and the seismic design for the cantilever beam.
Keywords: large-span; cantilever beam; prestressed concrete structure; structural design