预应力现浇混凝土管式空心楼盖承载性能试验研究
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摘要
为研究无黏结预应力现浇混凝土管式空心楼盖的受力性能,制作了一个1/4缩尺比例的无黏结预应力现浇混凝土管式空心板柱结构试验模型,通过在试验模型管式空心楼盖上施加竖向均布荷载的试验表明,该楼盖结构具有一定的承载能力,在荷载作用下各区格板发生竖向位移后,表现形状为"碗形",最大挠度发生在管式空心楼盖各区格板的跨中。有限元计算分析结果进一步说明,无黏结预应力现浇混凝土管式空心楼盖由于空心管的平行布置而呈现正交各向异性,在平行布管方向,楼板的连续性遭到破坏,楼板刚度削弱程度较大。在平行布管方向和垂直布管方向,无黏结预应力管式空心楼盖的变形仍可按连续板跨考虑。
In order to study the mechanical behaviors of post-tensioned unbonded prestressed concrete hollow flat floors,a 1 /4 scale post-tensioned unbonded prestressed reinforced concrete hollow slab-column structure model was made and test under the uniformly distributed load on the plate was done. The test results showed that the floor had a certain load carrying capacity. The deflection of concrete hollow flat floor by vertical load was a ‘bowl'shape. The point of maximan displacement was in the middle of concrete hollow flat floor. By means of finite element analysis methods,the calculation results showed that post-tensioned unbonded prestressed concrete hollow flat floor existed anisotropy with parallel circular-tubes. In parallel tube direction,the continuity of plate was destructed and the stiffness of the plate was decreased greatly. The plate deformation could still be regarded as continuous cross-plate in parallel tube directions and in vertical tube directions.
In order to study the mechanical behaviors of post-tensioned unbonded prestressed concrete hollow flat floors,a 1 /4 scale post-tensioned unbonded prestressed reinforced concrete hollow slab-column structure model was made and test under the uniformly distributed load on the plate was done. The test results showed that the floor had a certain load carrying capacity. The deflection of concrete hollow flat floor by vertical load was a ‘bowl'shape. The point of maximan displacement was in the middle of concrete hollow flat floor. By means of finite element analysis methods,the calculation results showed that post-tensioned unbonded prestressed concrete hollow flat floor existed anisotropy with parallel circular-tubes. In parallel tube direction,the continuity of plate was destructed and the stiffness of the plate was decreased greatly. The plate deformation could still be regarded as continuous cross-plate in parallel tube directions and in vertical tube directions.
引文
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[2]周朝阳,郑坤龙,李明.成排侧开圆孔受弯构件的应力简化计算[J].中南大学学报,2005,36(6):1089-1093.
[3]杨晓华,周朝阳,贺学军.预应力平行圆管混凝土空心板柱结构地震后承载力试验研究[J].工业建筑,2010,40(10):54-60.
[4]陈静茹,熊火清,彭少民.现浇钢筋混凝土空心无梁楼盖设计弯矩分析[J].武汉理工大学学报,2002,24(7):24-26.
[5]马克俭,郑涛,张华刚,等.钢丝网水泥管现浇混凝土空心板柱结构的实用分析法[J].空间结构,2002,8(3):14-21.
[6]张华刚,卢亚琴,马克俭,等.现浇空心板楼盖结构的静力性能分析[J].空间结构,2006,12(3):44-51.
[7]程文瀼,江韩,高仲学,等.圆管式无柱帽空心无梁楼盖的试验研究[J].建筑结构学报,2004,25(5):78-84.
[8]高仲学,程文瀼,黄晓晖,等.无柱帽混凝土空心无梁楼盖的设计与研究[J].工业建筑,2003,33(2):34-37.
[9]倪江波,马克俭,张华刚.现浇轻质填芯钢筋混凝土板柱结构的试验研究[J].建筑结构学报,2003,24(2):70-75.
[10]孙宝俊.预应力连续配筋的线形与等效荷载研究[J].工业建筑,1998,28(11):19-23.
[11]周威,郑文忠.预应力等效荷载计算的通用方法及其简化[J].哈尔滨工业大学学报,2005,37(1):49-51.
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