中文核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2001, Vol. 20 ›› Issue (3): 16-22.

• • 上一篇    下一篇

PPC受弯构件裂缝计算与控制

刘山洪1,魏建东1,冯晓2   

  1. 1.西南交通大学桥梁及结构工程研究所 四川成都610031;2.重庆交通学院道路工程系 重庆400074
  • 出版日期:2001-09-20 发布日期:2016-07-12

Crack control and calculation of the PPC flexural members

LIU Shan hong 1, WEI Jian dong 1, FENG Xiao 2   

  1. 1.Research Institute of Bridge and Structure, Southwest Jiaotong University,Sichuan Chengdu 610031,China;2.Highway Department Chongqing Jiaotong University,Chongqing 400074,China
  • Online:2001-09-20 Published:2016-07-12

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摘要： 部分预应力砼 (PPC)梁裂缝开展直接导致结构的刚度发生变化 .在使用荷载作用下,通过配置非预应力筋来实现控制裂缝的开展宽度,从而达到控制结构的正常使用性能 .采用变形理论探讨了裂缝发生的机理,推导出相应的计算公式,与已有的试验结果进行对比,开裂荷载水平和裂缝间距的计算值与实测值吻合较好,并指出计算裂缝宽度需要做进一步的试验研究和理论探索工作

关键词: 部分预应力, 钢筋砼, 裂缝, 变形, 梁

Abstract: The developing cracks lead to the stiffness change of Partially Prestressed Concrete(PPC)beams.The width of cracks are controlled by the method of layout suitable non pre bar so that the serviceability of structures are controlled.The mechanism of cracks occurring is discussed according to the deformation theory and the corresponding formulae are gained.The calculation results are compared with the testing results. The cracking load levels and the cracking spaces of the calculation is fit to that of testing.More testing research and theory work are needed to do at the aspects of calculating the crack width.

Key words: partially prestressed concrete, reinforced concrete, cracks, deformation, beam

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