原文传递
Role of Polyethylene Duct Cracking in Failure of Port Tensioning Cables in Florida Segmented Bridges.
| 题名： | Role of Polyethylene Duct Cracking in Failure of Port Tensioning Cables in Florida Segmented Bridges. |
| 关键词： | *Bridge-decks; *Post-tensioning.;Polyethylene-; Ducts-; Cables-; Cracking-Fracturing; Box-beams; Concrete-structures; Tendons-; Reinforced-concrete; Failure-; Corrosion-prevention; Construction-materials; Tensile-properties; Grout-; Chloride-; Bridge-design; Florida-. |
| 摘要： | During the past 20-plus years, designs based on the post-tension segmental box concept have evolved to become a predominant form of bridge construction; however, during the past five years, instances of tendon deterioration and failure have been disclosed on several Florida bridges. The underlying mechanism has been diagnosed as strand corrosion at grout voids in which bleed water accumulated. Cracking of high-density polyethylene (HDPE) ducts within which the grouted strands reside has also been disclosed. The purpose of the present research was to (1) assess the causes and mechanisms of this HDPE duct cracking, (2) develop performance based assessment tests, and (3) propose a standard for HDPE ducts employed in Florida bridges. |
| 报告类型： | 科技报告 |
相关文献
- Development of a Standard Accelerated Corrosion Test for Acceptance of Post-Tensioning Grouts in Florida.
- Post-Tensioning the Inverted-T Bridge System for Improved Durability and Increased Span-To-Depth Ratio.
- Post-Tensioning Tendon Installation and Grouting Manual. Final rept.
- COLLAPSE LOAD TEST OF 1:3 SHELL BRIDGE MODEL.
- Health Monitoring to Detect Failure of Prestressing (PS) Cables in Segmental Box-Girder Bridges.
- PROJECT PACIFIC SEA SPIDER Technology Used in Developing a Deep-Ocean Ultrastable Platform
检索历史
应用推荐
