期刊检索

  • 2024年第56卷
  • 2023年第55卷
  • 2022年第54卷
  • 2021年第53卷
  • 2020年第52卷
  • 2019年第51卷
  • 2018年第50卷
  • 2017年第49卷
  • 2016年第48卷
  • 2015年第47卷
  • 2014年第46卷
  • 2013年第45卷
  • 2012年第44卷
  • 2011年第43卷
  • 2010年第42卷
  • 第1期
  • 第2期

主管单位 中华人民共和国
工业和信息化部
主办单位 哈尔滨工业大学 主编 李隆球 国际刊号ISSN 0367-6234 国内刊号CN 23-1235/T

期刊网站二维码
微信公众号二维码
引用本文:周威,芦思炜.大内跨小边跨框架结构预应力筋优化布置方法[J].哈尔滨工业大学学报,2017,49(6):10.DOI:10.11918/j.issn.0367-6234.201605127
ZHOU Wei,LU Siwei.Optimizing profile arrangement of prestressing tendons in frames with interior large-span neighboring two exterior small-spans[J].Journal of Harbin Institute of Technology,2017,49(6):10.DOI:10.11918/j.issn.0367-6234.201605127
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
过刊浏览    高级检索
本文已被:浏览 6157次   下载 1907 本文二维码信息
码上扫一扫!
分享到: 微信 更多
大内跨小边跨框架结构预应力筋优化布置方法
周威1,2,芦思炜1,2
(1.哈尔滨工业大学 土木工程学院,哈尔滨 150090;2.结构工程灾变与控制教育部重点实验室(哈尔滨工业大学), 哈尔滨 150090)
摘要:
预应力筋的优化布置是大内跨小边跨的多跨预应力混凝土框架结构合理设计计算的关键.为满足控制截面承载力最大的需要,以往常将大跨所需预应力筋布置为连续曲线,并按水平直线延伸通过其相邻的两小跨,按这种布置方式仅使大跨内产生竖向向上的预应力等效荷载,可较好平衡大跨的竖向外荷载;而若将大跨及相邻的两小跨统一考虑,预应力筋按连续曲线布置,张拉产生的预应力等效荷载不但可有效平衡大跨的竖向外荷载而且也可平衡小跨的竖向外荷载,可以使荷载平衡得到优化实现.以一典型工程为例,分析了在相同条件下两种预应力筋布置过程中张拉引起的综合弯矩、主弯矩和次弯矩的分布和量值上差异,比较了两类布筋形式对正截面承载力计算结果的影响,验证了对大内跨小边跨框架结构统一考虑后整体上按三段连续正反抛物线预应力筋布置的合理性.
关键词:  预应力混凝土  预应力筋  优化布置  荷载平衡  大内跨小边跨
DOI:10.11918/j.issn.0367-6234.201605127
分类号:TU378
文献标识码:A
基金项目:黑龙江省应用技术研究与开发计划项目(2013G0763); 中央高校基本科研业务费专项资金资助(HIT.KISTP.201428)
Optimizing profile arrangement of prestressing tendons in frames with interior large-span neighboring two exterior small-spans
ZHOU Wei1,2,LU Siwei1,2
(1.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 2.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China)
Abstract:
Optimizing arrangement of prestressing tendons is a crucial aspect for calculation and design of frames with interior large-span neighboring two exterior small-spans. To maximize the capacity of critical section, prestressing tendons required in interior large-span are often arranged as continuous curve and extended as horizontal straight line to the side columns in two neighboring small-spans. This arrangement generates only upward prestress equivalent load in interior large-span, which could balance the vertical load in interior large-span effectively. While both of interior large-span and two neighboring exterior small-spans were concerned together as a single flexural member, and prestressing tendons were arranged as continuous curves, thus the equivalent load due to tensioning tendons would effectively balance the vertical loads both in interior large-span and two exterior small-spans. This arrangement can optimally realize the concept of load balancing. For a typical project, the differences in distribution and amplitudes of combination moment, major moment and second moment between two types of prestressing tendon profiles under the same conditions were analyzed. The influences on flexural capacity of normal section of two profiles were compared, and the rationality of continuous multi-curvature parabola profile in frames with interior large-span and neighboring exterior small-spans was validated.
Key words:  prestressed concrete  prestressing tendon  optimizing profile  equivalent load  large and small span

友情链接LINKS