详情

原文传递 Bridge Superstructure Research. Tasks 4-7: Design for Overloads in Prestressed Concrete Bridges. Final Report; Rept. for 23 1990.10-22 1994.3

题名：	Bridge Superstructure Research. Tasks 4-7: Design for Overloads in Prestressed Concrete Bridges. Final Report; Rept. for 23 1990.10-22 1994.3
作者：	West, H. H.; Schweich, T. P.; Mahally, P. H.
关键词：	Highway bridges; Beams(Supports); Prestressed concrete; Stress analysis; Cross sections; Cracking(Fracturing); Tensile stress
摘要：	In prestressed concrete bridge beams, regions that are initially subjected to compression are subsequently subjected to tension when overload conditions are encountered. In the design of such beams, an allowable tensile concrete stress may be specified for the precompressed tensile region of the beam for this overload condition. Since this allowable stress will affect the final design of the beam, it will subsequently have an effect on the behavior of the beam. Because AASHTO gives no clear guidelines on this matter, a questionnaire was distributed to 61 agencies to determine the state of current practice and thereby establish the range of tensile stress to be considered in this study.
总页数：	102p
报告类型：	科技报告