• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Development of Economical Low-Volume Road Bridges
【24h】

Development of Economical Low-Volume Road Bridges

机译：经济型低容量公路桥梁的发展

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Low-volume bridges are currently designed according to the same specifications as urban highway bridges. Thus, many of the low-volume bridge designs are overly conservative and uneconomical. The report addresses the issue and proposes modifications of the existing specifications in the areas of fatigue, deflection, allowable stress, composite action of timber decks, bridge width, lane loading and the use of guardrails. Value engineering principles have been used to develop and select economical bridge systems. All of the systems selected were combinations of prefabricated components. Jointless bridges received very high rankings and are strongly recommended for the 60-ft and 100-ft span ranges. A precast voided slab system and a timber deck and steel stringer system received the highest ranking on the 30-ft span range. The study also proposes a method of selecting the type of bridge system to be built in a particular area and a priority scheme to select which bridges must be replaced first.

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