超长预应力楼板抗裂效果的现场监测  

Monitoring of the Anti-split Effect on Prestressed of Super-length Building Floor Slab

作　　者：邵海平 陈长流[2] 来春景[2] 张小龙 张立东 张军 

机构地区：[1]中国移动通信集团甘肃有限公司,甘肃兰州730000 [2]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《甘肃科学学报》2008年第1期126-130,共5页Journal of Gansu Sciences

基　　金：甘肃省自然科学基金(ZS032-B25-021)

摘　　要：通过对一典型超长混凝土建筑结构的框架梁和次梁中的预应力钢筋和混凝土的应变随环境温度变化情况的一年多的监测,给出了预应力钢筋的预应力损失情况和混凝土的应变随环境温度变化而变化的规律,从而确定混凝土结构在温度作用下的变形规律,并验证了设计上采用的裂缝控制措施的有效性.其监测结果对超长混凝土建筑结构的设计有一定的参考作用.By means of monitoring on the strain of the prestressed tendon and the concrete in the frame beam and the secondary beam of a typical super-length concrete structure under the action of the ambient temperature variation, the prestressed losses of the unbonded tendons and the variation law of the concrete strain with the ambient temperature variation were given. Thus the deformation law of the structure was defined. The effectiveness of the crack control measures in design was verified. This monitoring result could be a reference for the designs of super-length reinforced concrete structure.

关 键 词：超长预应力楼板 无粘结预应力 抗裂 环境温度 温度裂缝 

分 类 号：TU378[建筑科学—结构工程]