摘要
常州市体育中心体育场采用了超长混凝土框架结构体系,由于混凝土收缩及温度下降会在结构中产生拉应力,使结构可能出现有害裂缝。通过对楼板施加无粘结后张预应力来控制结构有害裂缝开展,介绍了如何计算混凝土的收缩应力、温度应力,以及张拉过程中采用的计算模型及设计方法。
The super-length concrete frame structure is adopted for the Stadium of Municipal Sport Center in Changzhou. Because of the shrinkage in the concrete and the fall of temperature, the stress in the concrete structure may appear and it can make the crack in the concrete come forth. The design method of unbonded post-tensioned prestressed in the slabs and beams in the stand which can control the development of crack is introduced. And the stress of shrinkage and temperature in the concrete structure are calculated. The calculating model of the tension prosess of the prestressed structure is introduced.
出处
《建筑结构》
CSCD
北大核心
2009年第9期67-69,90,共4页
Building Structure
关键词
超长混凝土结构
框架结构
无粘结后张预应力
收缩应力
温度应力
super-length structure
frame structure
unbonded post-tensioned prestressed
stress of concrete shrinkage
stress of concrete temperature
