摘要
延安体育场东看台与健身广场采用后张有粘结预应力混凝土框架结构,健身广场第一跨为27.5m预应力混凝土转换梁,东看台采用27.28m预应力混凝土框架梁,使跨河跨路工程解决了市区排洪与交通问题。对梁端负弯矩较大的部位采取竖向加腋或水平加腋,有效地解决了露天结构中构件不出现裂缝的设计要求。对东看台中间支座梁端负弯矩较大部位,采用一端在梁内固定,另一端在第二跨梁底或梁侧张拉的抛物线布筋方式,避免了因连续布筋过多造成预应力偏心弯矩过大而引起的边柱或悬臂梁受力不合理的现象。给出了结构的特点和节点构造,以及预应力转换梁施工阶段验算结果及预应力筋分段分批张拉的施工顺序。
The bonded post-stressed concrete frame is used in the stand and playground of Yah＇ an Stadium. The first poststressed concrete transfer-beam of the playground is 27 .Sin, and the post-stressed concrete beam of the east stand is 27.28m. Horizontal and vertical haunch is used. The beam negative moment is big. The parabolic cable, whose one end is anchored in beam and the other end is stretched at the beam bottom or side, is used in the place of the east stand beam whose negative moment is big in middle pedestal. Some characteristics of the design and constructional detail of the frame joint are introduced. The checking calculation of the post-stressed concrete transfer-beam in the construction period and the stretching sequence of the deformed bar is also introduced.
出处
《建筑结构》
CSCD
北大核心
2007年第10期9-13,共5页
Building Structure
关键词
预应力混凝土框架
转换梁
预应力次弯矩
施工验算
张拉顺序
post-stressed concrete frame
transfer-beam
sub-moment
checking calculation
stretching sequence
