Papers by Edwin Schmeckpeper
W&XF?lBvTlC?N OF MIS OOWMEW 1s UNLW DISCLAIMER This report was prepared as an account of work spo... more W&XF?lBvTlC?N OF MIS OOWMEW 1s UNLW DISCLAIMER This report was prepared as an account of work sponsored by an agency d t h e United States Covcrnment. Neither the United States Government nor any agency thereof, nor any of their employees, maku any warranty, express or implied, or assumes any legd liability or responsibility kK the accuracy, completeness, or usefulness of any information, apparatus, product or process dbclolcd, or represents that Us use would not infringe private&y owned rights. Referenccr herein to any specifk commercirl product, process, or service by trade name, trademark, manufacturer, or OtbCnVte, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the Unfted S t a h Government or any agency thered The views and opinions of authors expreraed herein do not necessarily state or reflect those of the United States Government or m y agency
In recent years, the Bridge Section of the Idaho Transportation Department (ITD) has observed inc... more In recent years, the Bridge Section of the Idaho Transportation Department (ITD) has observed increased cracking in concrete bridge decks. This increase in cracking has occurred in concrete bridge decks that have used designs that historically produced satisfactory performance. The cracking has occurred both in new decks and in decks that have been subjected to traffic for various periods of time. To determine possible reasons for the increased cracking, researchers at the University of Idaho (UI) have performed a literature review of articles, papers, and standards focused on bridge deck cracking. In addition, the deck of a bridge for highway US 95 constructed over the South Fork of the Palouse River was instrumented with strain and temperature gauges. This project was the first in the State of Idaho involving the use of HPC for the bridge deck. The weather and concrete placement procedures were also monitored and material testing was performed on the deck concrete. The deck was placed in two stages; the first stage portion of the deck was constructed using the conventional Idaho Class 40A mix, while the second stage portion was constructed using a high performance concrete mix. The results of the monitoring and testing on both stages of the bridge deck were then compared to the literature review to determine the cause of cracking in the deck. In addition, the report compares the concrete used in the two bridge decks to determine if the high performance concrete mix provided any improvement with respect to cracking. Finally, the report presents recommendations on how to reduce cracking. Results from the monitoring and testing of the Stage 1 deck indicated that cracking in the concrete was mostly due to restraint of the deck by the girders and parapet wall. Uplift from skew and high heat of hydration temperatures were the main causes of tensile stress build up in the deck, compounded by the low creep and high modulus of elasticity of the concrete used. Results from the monitoring and testing of Stage 2 indicated that cracking in the concrete was also mostly due to restraint of the deck by the girders and parapet wall.
The Idaho Transportation Department (ITD) Standard Specifications for Highway Construction requir... more The Idaho Transportation Department (ITD) Standard Specifications for Highway Construction requires that all steel surfaces of unpainted weathering steel structures are to be blast cleaned in the shop. Despite precautions taken to protect faying surfaces during the fabrication, transportation, and erection processes, some rusting or contamination of the faying surfaces, by oil, dust, road salts, or cleaning fluids may occur. The effects of the accumulation of small amounts of rust have been documented. Yura, et al. (1981) found that when subject to normal atmospheric exposures, a Class B (blast-cleaned) slip coefficient could be maintained for up to one year prior to joint assembly. However, the effects of contaminates on the faying surfaces are not known. In addition, the effects of attempts at removing the contaminates are not known. It is hypothesized that the residues remaining from attempts at removing contaminates from the faying surface might reduce the slip coefficient more than the presence of the original contaminates. The objective of this project was to provide guidance to ITD inspectors for judging the acceptability condition of steel faying surfaces. This would include guidelines to determine when the accumulation of contaminates on the faying surface has reached objectionable levels, and appropriate methods for removing contaminates from faying surfaces. These guidelines and methods could be incorporated into the ITD specifications.
Fiber-Reinforced Plastic Grid for Reinforced Concrete Construction
Journal of Composite Materials, Aug 1, 1994
ABSTRACT The objective of this paper was to evaluate the suitability of Fiber-Reinforced Plastic ... more ABSTRACT The objective of this paper was to evaluate the suitability of Fiber-Reinforced Plastic (FRP) grids for use as a structural reinforcement in slab-type concrete structures. The behavior of concrete beams reinforced with FRP grids was experimentally investigated. Two different types of FRP grids were tested; the first type used carbon fibers, the second type used a mixture of carbon and E-Glass fibers. The mechanical properties of these two FRP grids were determined. For each of the two types of reinforcement, five concrete beams were tested to failure. The flexural behavior, as characterized by the load-deflection response, was monitored throughout the tests. The results from the flexural tests on FRP reinforced concrete beams showed that the failure mode, measured deflections and ultimate loads were consistent with predictions.
EdUI: A Nascent Educational Informatics System at the University of Idaho
E-Learn: World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education, 2004
The design of an educational informatics system called EdUI, currently in development at the Univ... more The design of an educational informatics system called EdUI, currently in development at the University of Idaho, is presented. Its purposes are to improve student retention and learning, and to facilitate efficient organization and presentation of learning resources. EdUI is essentially composed of a relational database of metadata describing and linked to learning objects. The use of open source software and widely accepted standards ensures interoperability. Three viewpoints are simultaneously considered in the design: educational, technological, and sustainability.
Instruction Manual for Load Rating the I.B. Perrine Bridge
Abstract: This instruction manual describes how to perform three tasks:(1) running a basic load r... more Abstract: This instruction manual describes how to perform three tasks:(1) running a basic load rating analysis for a predefined load;(2) entering a new moving load pattern; and (3) modifying LRFR parameters used to estimate rating factors for varying bridge conditions ...
Ten Effects of Over-Tightening High-Strength Bolts Used in Bolted Connections in Bridges
This report describes the research program conducted on high-strength bolts and connectors that h... more This report describes the research program conducted on high-strength bolts and connectors that have been over-tightened. Direct-tension indicators (DTI) may be specified for use on high-strength bolts to verify that the bolts have been sufficiently tensioned. This research was initiated at the request of the Idaho Transportation Department in order to resolve questions concerning the use of bolts installed with DTI which had been tightened to zero gap readings.
Data Collection Using a Portable Computer and Digitizing Tablet
This paper describes a data collection system developed by the New Hampshire Technology Transfer ... more This paper describes a data collection system developed by the New Hampshire Technology Transfer Center. The key features of this data collection method are its ease of use, single step data entry, and speed of operation. This paper demonstrates the application of this data collection system in several different situations. These applications include the collection of traffic volume information and the collection of road surface distress characteristics.
Road Surface Management System for Small to Midsized Communities
This paper describes a Road Surface Management Systems (RSMS) developed by the New Hampshire Tech... more This paper describes a Road Surface Management Systems (RSMS) developed by the New Hampshire Technology Transfer Center. Subjects covered include RSMS components, road inventories, repair techniques, condition surveys, training requirements, and others.
Splice/Development Length Requirements for FRP Grids Used in the Structural Reinforcement of Concrete
The research presented in this paper program was directed towards determining development length ... more The research presented in this paper program was directed towards determining development length and splice requirements for FRP grids used in the reinforcement of concrete structures. Test results indicate that the ACI 318 provisions for welded wire mesh envelope the development length requirements for FRP grids. This work is one of the steps required to determine the suitability of the FRP material for various structural applications, such as bridge decks or pavements.
2020 ASEE Virtual Annual Conference Content Access Proceedings, Sep 8, 2020
Schmeckpeper taught at a land-grant college, the University of Idaho, and worked as an engineer i... more Schmeckpeper taught at a land-grant college, the University of Idaho, and worked as an engineer in design offices and at construction sites.
Load Rating the I.B. Perrine Bridge, Phase 1
Abstract: The IB Perrine Bridge spans across the Snake River on US 93 north of Twin Falls, Idaho.... more Abstract: The IB Perrine Bridge spans across the Snake River on US 93 north of Twin Falls, Idaho. The bridge carries a significant volume of truck traffic and the Idaho Transportation Department receives regular requests for permits to run overweight and other over-permit ...
Direct tension indicators (DTIs) are one alternative method that is commonly used to verify that ... more Direct tension indicators (DTIs) are one alternative method that is commonly used to verify that high-strength bolts have been properly tensioned during installation. This research attempts to resolve questions concerning the use of bolts which may have been overtensioned, as evidenced by DTIs which were completely flattened to zero DTI gaps. A variety of bolt and DTI combinations were tested to determine how far the nuts could rotate before the bolt fractured. Sets of bolts and nuts with DTIs were then tensioned to the point of incipient failure and tested in single and double shear. These tests indicated there was no significant decrease in the single and double shear strengths of these over-tensioned bolts. In addition, a series of tests compared the performance of DTIs manufactured per ASTM F959-90 to those manufactured per ASTM F959-96. These tests indicated that the F959-96 DTIs exhibit less variability and indicate higher preloads at the specified DTI gaps compared to those manufactured to F959-90.
The Effects of Over-Tightening High-Strength Bolts Used in Bolted Connections in Bridges Final Report
Testing of Concrete Curtain Wall Panels Reinforced with FRP Grids
Structures Congress XII, 1994
... Testing of Concrete Curtain Wall Panels Reinforced with FRP Grids. by Edwin R. Schmeckpeper ,... more ... Testing of Concrete Curtain Wall Panels Reinforced with FRP Grids. by Edwin R. Schmeckpeper ,Richard Nielsen , and Charles H. Goodspeed pp. 1250-1255 Purchase Information Permissions for Reuse Document type: Conference Proceeding Paper. ...
Transportation Research Board 90th Annual MeetingTransportation Research Board, Jan 30, 2010
Single-Span Prestressed Girder Bridge: LRFD Design and Comparison
Journal of Bridge Engineering, 2002
This report summarizes the comparative design of a single-span AASHTO Type III girder bridge unde... more This report summarizes the comparative design of a single-span AASHTO Type III girder bridge under the AASHTO Standard Specification for Highway Bridges, 16th Edition, and the AASHTO LRFD Bridge Design Specification. The writers address the differences in design philosophy, calculation procedures, and the resulting design. Foundation design and related geotechnical considerations are not considered. The LRFD design was similar in most respects to the Standard Specification design. The significant differences were: (1) increased shear reinforcement; (2) increased reinforcement in the deck overhang; and (3) increased reinforcement in the wing wall. The comparisons would likely change if the bridge were designed purely according to LRFD Specifications rather than as a comparative design. Design procedures under the LRFD Specification tend to be more calculation-intensive. However, the added complexity of the LRFD Specification is counterbalanced by the consistency of the design philosophy and its ability to ...
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Papers by Edwin Schmeckpeper