Catalog Search Results
42) Investigation of seismic performance and design of typical curved and skewed bridges in Colorado
Author
Pub. Date
2018.
Description
This report summarizes the analytical studies on the seismic performance of typical Colorado concrete bridges, particularly those with curved and skewed configurations. A set of bridge models with different geometric configurations derived from. a prototype bridge selected in Denver area were studied. Some discussions about the connection modeling are carried out in terms of the interior bent support. For the displacement-based and force-based designs,...
Author
Pub. Date
1998.
Description
The Pontis Bridge Inspection Coding Guide was developed by the Staff Bridge Branch of the Colorado Department of Transportation. This revision includes cross references to the General Comments and Definitions necessary to provide for uniform inspection reports from various bridge inspectors and is intended to supplement the AASHTO Guide for Commonly Recognized (CoRe) Structural Elements with clarifying information and additional elements unique to...
Author
Pub. Date
2010.
Description
This study examined the performance of concrete mixtures designed to increase cracking resistance for Colorado bridge decks. The current CDOT Class H and HT concrete mixtures and nine other mixtures were investigated to aid in the development of a more crack resistant concrete specification.
Pub. Date
2013-
Description
In September, 2013, a slow-moving cold front stalled over Colorado, clashing with warm humid air from the south, resulting in a severe rain event that lasted a week and caused catastrophic flooding and damage along Colorados Front Range. Flood impacts were widespread, particularly across northern Colorado, where rockslides, landslides, mudslides and washouts caused major damage and, in some cases, total destruction of residences, roadways and local...
Author
Pub. Date
[2006]
Description
The results of this study confirm the performance of the baseline CDOT bridge deck mixes/systems, indicate some new products that show promise for implementation, and suggest that combinations of products might be the best approach to protection for Colorado bridge decks exposed to deicing chemicals.
Author
Pub. Date
2003.
Description
This study evaluates the strength and long-term performance of CFRP prestressed panels in a bridge deck, compares the behavior of bridge decks designed with the empirical and conventional methods of AASHTO, and a new limit-state design, and examines the influence of lap splices between precast panels on deck cracking.
Author
Pub. Date
2017.
Description
The ongoing deterioration of highway bridges in Colorado dictates that an effective method for allocating limited management resources be developed. In order to predict bridge deterioration in advance, mechanistic models that analyze the physical processes causing deterioration are capable of supplementing purely statistical models and addressing limitations associated with bridge inspection data and statistical methods. A review of existing analytical...
Author
Pub. Date
2020.
Description
This report presents a case study on the evaluation of bridge decks using various non-destructive test methods. The primary interest lies in quantifying delaminated areas in deck concrete covered with asphalt overlays. Analytical and computational models are formulated to decompose the intensity of GPR scales into two categories: i) initiation and progression of corrosion and ii) delamination of deck concrete, which show good agreement...
Author
Pub. Date
2007.
Description
Self-consolidating concrete (SCC) is a stable and highly flowable concrete that consolidates without the help of external vibration and can flow through heavy reinforcement and around corners in complex formwork under its own weight. The exceptional performance of this remarkable material has attracted the attention of construction firms and DOTs in the United States interested in using SCC on new bridge construction and bridge repair projects.
Author
Pub. Date
2018.
Description
This report presents the development of ultra-high performance concrete (UHPC) using locally available materials that reduce construction costs compared with commercial products. With the aim of achieving a specified compressive strength of 20 ksi, a UHPC mixture is formulated. The implications of various constituent types are examined with an emphasis on silica compounds (silica fume, silica powder, silica sand, finer silica sand, pyrogenic silica,...
Author
Pub. Date
2014.
Description
The study found that FAST systems have demonstrated the potential to reduce the number of crashes and reduce the cost of winter maintenance activities, if sited at appropriate locations (e.g., high-traffic-volume ice-prone ramps). However, improved installation techniques and involvement of maintenance crews during FAST installation are necessary to further increase the cost-effectiveness of a FAST system deployment. Extra effort will be made in sharing...
