Control of time-dependent effects in steel-concrete composite frames

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• 作者：Lalit Kumar Varshney (1)
  K. A. Patel (1)
  Sandeep Chaudhary (2)
  A. K. Nagpal (1)
  
• 关键词：composite frames ; cracking ; creep ; deflection ; shored construction ; shrinkage ; un ; shored construction
• 刊名：International Journal of Steel Structures
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：13
• 期：4
• 页码：589-606
• 全文大小：1,143 KB
• 作者单位：Lalit Kumar Varshney (1)
  K. A. Patel (1)
  Sandeep Chaudhary (2)
  A. K. Nagpal (1)
  
  1. Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
  2. Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, 302017, India
  
• ISSN：2093-6311

文摘

Studies are presented for the control of time-dependent effects of creep and shrinkage in steel-concrete composite frames with pre-cast concrete slab for both shored and un-shored constructions. A developed hybrid procedure has been used for carrying out the studies. The procedure accounts for creep, shrinkage and progressive cracking in concrete slab panels. Two frames, a single storey and a five storey frame are considered. It is shown that, for both the types of constructions, shored and un-shored, the increase in bending moments and mid-span deflections can be controlled to a significant degree, without putting constraints on design parameters, by simply delaying the time of mobilization of composite action between the pre-cast concrete slab panels and the steel section. It is also found that though there is insignificant effect of type of construction on bending moments, the percentage change in mid-span deflection due to creep and shrinkage is significantly higher for shored construction.