• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Transportation Research Record >Survey of Current Practice for Design of High-Strength Concrete Prestressed Bridge Girders
【24h】

Survey of Current Practice for Design of High-Strength Concrete Prestressed Bridge Girders

机译：高强混凝土预应力桥梁设计现状的调查

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A survey was conducted to determine the current state of practice for the design of high-strength concrete (HSC) prestressed bridge girders among the 52 state departments of transportation (DOTs) in the United States. A total of 41 responses were received during a 6-month period spanning from June through November 2002. It was found that the AASHTO Standard Specifications for Highway Bridges, 16th edition, is the most popular code for bridge design in current practice. In most cases its implementation is partial; most states plan complete implementation between 2003 and 2007. State DOTs have a large variation in the number of new bridges constructed, ranging from 4 to 400 bridges per year. The percentage of bridges constructed with HSC prestressed girders ranges from 0% to 100%. HSC is widely used in current practice, with 85% of the responding DOTs using specified concrete compressive strengths at service in the range of 6,000 to 8,000 psi. In this study the definition of HSC is concrete with specified compressive strengths for design of 6,000 psi or greater, made without the use of exotic materials or techniques. In some cases concrete mixture designs are governed by the specified concrete compressive strength at release. This parameter tends to be critical when it is greater than 6,000 psi. Almost half of the DOTs have some concerns related to the use of HSC, and seven DOTs have made in-house adjustments to the design specifications for HSC prestressed bridge girders.
机译：进行了一项调查，以确定美国52个州交通运输部（DOT）中设计高强度混凝土（HSC）预应力桥梁大梁的当前实践状态。在2002年6月至2002年11月的6个月中，共收到了41份答复。发现，AASHTO第16版公路桥梁标准规范是当前实践中最受欢迎的桥梁设计规范。在大多数情况下，它的实现是部分的；大多数州计划在2003年至2007年之间完全实施。州DOT新建桥梁的数量差异很大，每年从4座到400座不等。使用HSC预应力大梁建造的桥梁的百分比范围从0％到100％。 HSC在当前的实践中被广泛使用，在使用中指定的混凝土抗压强度中，有85％的DOT使用的混凝土抗压强度在6,000至8,000 psi的范围内。在这项研究中，HSC的定义是具有指定抗压强度的混凝土，设计抗压强度为6,000 psi或更高，无需使用特殊材料或技术即可制成。在某些情况下，混凝土混合物的设计受释放时规定的混凝土抗压强度控制。大于6,000 psi时，此参数往往很关键。几乎一半的DOT都与HSC的使用有关，并且有七个DOT对HSC预应力桥梁的设计规范进行了内部调整。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号