大悬挑后张有粘结空间预应力混凝土结构体系的研究  

Study on Large Cantilevered Concrete Structure System with Bonded Post-tension Space Pre-stress

作　　者：朱保兵 

机构地区：[1]上海城开(集团)有限公司,200030 [2]上海寰宇城市投资发展有限公司,200030

出　　处：《特种结构》2016年第3期107-113,共7页Special Structures

基　　金：上海市青年科技启明星计划项目(11QB1403200)

摘　　要：针对大悬挑后张有粘结空间预应力混凝土结构体系展开研究。通过在某音乐厅底部和顶部的大悬挑梁及大悬挑端部的梁上立柱中施加后张有粘结预应力,构建了空间预应力体系,辅以音乐厅两侧的混凝土伸臂桁架,实现了22m的大悬挑,其自振特性分析表明大悬挑区域刚度较高。然后通过施工顺序分析,明确了大悬挑区域全部施工完毕后拆模的方法可以使构件受力更加合理、设计更加经济,且中震下设定的结构关键构件抗震性能目标均能得到满足。最后,通过整体模型振动台试验验证了结构的安全性。Large cantilevered concrete structure system with bondedpost-tension space pre-stress was studied in this paper.By applying post-tension bonded pre-stress in the bottom and the top large cantilever beams and the pillars on the end of the beams of a music hall,space pre-stressed system was built.With concrete outrigger truss on either side of the music hall,the large 22 meters cantilever was realized.Free vibration characteristics analysis showed that large cantilever region had high rigidity.Then by construction sequence analysis,method of construction completed before removal of the template was found,which could make structural force more reasonable and design more economic.It was shown that the key structural components seismic performance objectives under moderate earthquake could be met.The safety of the structure was verified by the whole model shaking table test.

关 键 词：大悬挑混凝土结构 空间预应力 施工顺序分析 关键构件 振动台试验 

分 类 号：TU378[建筑科学—结构工程]