海控国际广场续建超高层结构设计

海控国际广场原设计为168m高的办公楼,1995年施工到15层后停建。2006年决定对其续建,结构主体高度增加至190m。原结构竖向构件混凝土强度设计值为C58,经现场检测仅为C45左右,且钢筋锈蚀严重。根据结构的现状和特点,确定续建结构沿用原筒中筒结构体系,而将上部混凝土框筒梁改为钢梁以减轻结构自重。采用SATWE软件和ETABS软件对结构进行了分析,主要计算结果均满足规范要求。进行了弹性时程补充计算,研究了高阶振型对结构的影响。进行了静力弹塑性分析,研究了结构的抗震性能。钢筋混凝土构件主要采用了加大截面法和聚合物砂浆-钢丝绳网片方法加固。为提供底部入口大空间,原设计中采用空腹桁架转换的方式,续建中将其改为斜撑转换形式,使转换构件在大震作用下保持弹性。

Structural design of continuing-constructed high-rise building of Haikong International Plaza

Originally,Haikong International Plaza was designed to be a 168m-high office building,but the construction was broken in 1995,and continued in 2006 with the height increased to 190m.The tested strength of concrete of vertical members is 45MPa,far below the design strength of 58MPa,and the steel bars were corroded badly.According to inspection results,the original structural system tube-in-tube system is maintained,but the reinforced concrete frame-tube beams were replaced by steel beams.Structural analysis ...