摘要
中国博览会会展综合体项目C1区展厅部分16m楼层由于梁跨度及上部荷载较大而采用了后张有粘结预应力技术。框架梁和井字梁在预应力和自重作用下其挠度变形复杂,各部分关键区域的下挠值差别较大,在施工过程中对16m楼层的梁板预起拱必须引起重视。对超大跨度预应力混凝土梁板预起拱进行有限元分析并与规范要求的起拱值进行比较,合理确定了该层梁板的预起拱值。
Post tensioning pre-stressing technique is used in beams and slabs of 16m floor in China Expo Complex project hall C1 because of the beam span and upper load larger. Deflections of frame beams and cross beams are complexed because of pre-stressing and weight, deflection values difference in key region are relatively large, therefore the pre-bagging of beams and slabs need to be attention. In this paper, the pre- bagging of large span prestressed concrete beam and slab is analyzed, finite elemnet analysis results and the specification values are compared, and the pre-bagging values of beams and slabs are determined in reason.
出处
《建筑技术》
2014年第12期1139-1141,共3页
Architecture Technology
