摘要
为完善既有房屋套建增层改造决策系统和技术措施,结合具体工程实践,对预应力混凝土框架结构套建增层;新增结构一层顶采用内置预应力钢桁架-混凝土组合框架梁的框架结构套建增层;预应力钢-混凝土组合框架结构套建增层的设计与施工要点,进行对比分析.结果表明:预应力钢-混凝土组合框架结构套建增层,不但可实现施工过程中底层楼盖的自承重,而且与其他方案相比,结构整体造价低,施工周期短.因此,在既有房屋套建增层改造中应优先选择预应力钢-混凝土组合框架结构.
In order to perfect decision - making system and technique measure of outer - jacketing structure for adding story around existing building, combined with actual project practice, three types of outer-jacketing structures for adding story are introduced. They are prestressed concrete outer -jacketing frame structure for adding story, outer - jacketing frame structure for adding story with encased prestressed steel - truss - concrete composite beam for first floor of new - added structure, and prestressed steel - concrete composite outer -jacketing frame for adding story. Characteristics of these outer - jacketing structures were compared and analyzed. The results show that using the method of prestressed steel - concrete composite outer - jacketing frame for adding story, the weight of the first floor can be carried by the structure itself during construction, in addition, the structural whole cost is lower and the construction period is shorter than using other schemes. So prestressed steel - concrete composite frame structure should be firstly chosen in outer- jacketing structure reconstruction for adding story around existing building.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2008年第2期192-195,263,共5页
Journal of Harbin Institute of Technology
基金
教育部新世纪优秀人才支持计划资助项目(教技司[2005]290号)
黑龙江省科技攻关资助项目(GC04A609)
哈尔滨市科技攻关计划项资助目(2004AA9CS187)
关键词
预应力
套建增层
混凝土框架
内置钢桁架
prestress
outer - jacketing structure for adding story
concrete frame
encased steel truss
