Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ Design Guidelines for Bridge Pile Foundations Subjected to Combined Inertial and Liquefaction-Induced Lateral Spreading Loads https://rip.trb.org/View/2724825 Wed, 08 Jul 2026 14:50:18 GMT https://rip.trb.org/View/2724825 In-Stream Vegetation for Scour Control at High-Proximity Bridge Crossing Elements https://rip.trb.org/View/2706037 Sat, 23 May 2026 18:04:47 GMT https://rip.trb.org/View/2706037 Development of design guidelines for protection against erosion at bridge piers of rectangular cross section and estimating effects of pressurized flow on erosion potential https://rip.trb.org/View/2706034 Sat, 23 May 2026 17:39:45 GMT https://rip.trb.org/View/2706034 Rehabilitation of Deteriorated Timber Piles Using Ultra High Performance Concrete https://rip.trb.org/View/2646939 Mon, 05 Jan 2026 22:38:43 GMT https://rip.trb.org/View/2646939 Seismic Performance of Steel-Concrete Composite Bridge Piers https://rip.trb.org/View/2646095 Mon, 29 Dec 2025 11:22:47 GMT https://rip.trb.org/View/2646095 Development of new design guidelines for protection against erosion at bridge piers and estimating effects of pressurized flow on erosion potential https://rip.trb.org/View/2627350 Wed, 19 Nov 2025 14:27:06 GMT https://rip.trb.org/View/2627350 TRS: Management of Woody Debris in Rivers to Protect Bridges and Reduce Flood Risk https://rip.trb.org/View/2607955 Wed, 08 Oct 2025 16:56:43 GMT https://rip.trb.org/View/2607955 Concrete Removal Limits for the Rehabilitation of Bridge Piers https://rip.trb.org/View/2567105 Sun, 22 Jun 2025 10:02:19 GMT https://rip.trb.org/View/2567105 Modeling and Assessment of the Remaining Service Life for Steel Bridge Piles in Michigan https://rip.trb.org/View/2562264 100 ppm) and sulfates (>200 ppm) have been identified as indicatives of corrosive soil in Federal Highway Administration guidelines for mechanically stabilized earth walls. Chloride ions, which directly participate in the anodic reaction of corrosions, could be a major threat for bridges in Michigan due to the large amount of de-icing agent applied in snow season. (c) Moisture content. Moisture is necessary for corrosion. Therefore, highest level of corrosion is usually found in water table fluctuation zone. (d) Bacteria. Microbiologically Influenced Corrosion (MIC), an electrochemical corrosion affected by the presence of biological agents, can also severely degrade the steel surfaces. (e) Pile type and loading history. The material, dimension and loading history of the steel piles can have impact on their corrosion rate. (3) There is no widely accepted method to predict pile corrosion. Current single variable or multivariable regression models do not consider all factors listed above, and thus lack generalizability. More importantly, the corrosion environment in Michigan may require its unique regression model. With these unsolved issues, the threat of influencing factors cannot be ranked. (4) There is lack of accurate prediction of the remaining load-bearing capacity of corroded steel piles. While several methods (AISC, AISI-EWM, AISI-DSM, etc.) have been developed, the localized corrosion as well as stiffness change make their assumption invalid and cause conservative prediction of the remaining life. (5) Many retrofit or repair techniques have been implemented for strengthening the corroded steel piles, but a detailed cost-effectiveness analysis (CEA) for those techniques should be conducted to minimize future construction cost in Michigan. Based on the above discussion, it is essential to investigate the effect of various factors on corrosion rate of steel bridge piles and predict the remaining load-bearing capacity of corroded piles. Consequently, proper repair technique can be applied at appropriate time to maintain and prolong the service life of bridges in Michigan.]]> Fri, 06 Jun 2025 14:44:09 GMT https://rip.trb.org/View/2562264 Implementation of NCHRP Research Report 887 - Guidance for Underwater Installation of Filter Systems https://rip.trb.org/View/2560834 Tue, 03 Jun 2025 13:24:29 GMT https://rip.trb.org/View/2560834 Resilience Program: Preliminary Investigation of Bridge Scour Countermeasure and Mitigation Strategies in Virginia https://rip.trb.org/View/2536175 Thu, 10 Apr 2025 09:13:57 GMT https://rip.trb.org/View/2536175 Bracing for Impact: Developing Steel-Concrete Sandwich Panel Retrofits for Increased Bridge Pier Protection https://rip.trb.org/View/2499034 Wed, 29 Jan 2025 17:03:45 GMT https://rip.trb.org/View/2499034 Environmental Monitoring to Support Revised Steel Pile Corrosion Protection Specifications https://rip.trb.org/View/2452924 Fri, 15 Nov 2024 16:43:20 GMT https://rip.trb.org/View/2452924 UHPC for Durable and Post-Earthquake Functional Recovery Bridge Piers https://rip.trb.org/View/2440290 Sun, 13 Oct 2024 11:33:29 GMT https://rip.trb.org/View/2440290 SPR-4925: A Synthesis Study to Identify and Make Recommendations on The Appropriate Nondestructive Testing Tools for Bridge Beam Ends, Piers, Abutments https://rip.trb.org/View/2434096 Wed, 25 Sep 2024 09:12:34 GMT https://rip.trb.org/View/2434096