Determination of Technical Condition of a Bridge Structure Based on Survey Results

2018 ◽  
Vol 931 ◽  
pp. 643-648 ◽  
Author(s):  
Marina O. Karpushko ◽  
Igor L. Bartolomei ◽  
Elena N. Karpushko
Keyword(s):  
Traffic Safety ◽  
Carrying Capacity ◽  
High Performance ◽  
High Water ◽  
Technical Condition ◽  
Safety Requirements ◽  
The Road ◽  
Ice Drift ◽  
Load Carrying ◽  
Survey Results

Nowadays, the age of most transport facilities in Russian Federation is estimated in many decades. Consequently, there is an urgent need for periodic surveys and monitoring of the state of each structure, its individual structural elements. The main purpose of these measures is to maintain the high performance indicators of the transport structure, the achievement of which is impossible without examination, analysis and evaluation of parts of the structure that are in the aquatic environment and, as a consequence, the occurrence and development of various types and degrees of defects and damages. The most important conditions for ensuring uninterrupted and safe traffic along the bridges of vehicles and pedestrians are: the normative load-carrying capacity of the structure; required clearance of the roadway and sidewalks; compliance with traffic safety requirements for bridges; observance of characteristics and maintenance of the bridge capacity for the period of ice drift and high water; timely performance of work on the care, maintenance and repair of the elements of the bridge. Technically sound structures and their reliability can be ensured if all the parameters of the road category structure and the requirements of regulatory documents are met. The work presents the survey materials of the bridge. Classification of defects by group and class of danger. The results of determining the carrying capacity on the basis of the survey are given.

Strengthening and widening of steel pony truss bridges

1977 ◽  
Vol 4 (2) ◽  
pp. 214-225
Author(s):  
Baidar Bakht ◽  
Paul F. Csagoly
Keyword(s):  
Traffic Safety ◽  
Carrying Capacity ◽  
Point Of View ◽  
Load Carrying Capacity ◽  
Truss Bridges ◽  
Load Carrying ◽  
Live Loads ◽  
Pros And Cons ◽  
Pony Truss Bridge ◽  
Truss Bridge

There are many thousands of existing pony truss bridges in North America which were constructed in the earlier part of this century and are still serving as important traffic carriers. The present economic situation demands that these bridges should usefully serve their purpose for as long as is safely possible.These bridges could be found inadequate for either or both of the following reasons. With the exception of remote areas, operational traffic safety would require two 12-ft lanes plus adequate shoulders. Many of these old bridges are therefore unsatisfactory from the geometrical point of view. Some bridges were designed for live loads that are only a fraction of present commercial vehicle weights.A computer-oriented method of rigorous analysis of lateral buckling behaviour of pony truss bridges is briefly discussed. The method is implemented through a computer program which has been validated by experimental data. It is expected that the program would predict realistic values of load-carrying capacity of such bridges and would help to avoid many an unnecessary replacement.Various methods of strengthening and widening pony truss bridges, and their pros and cons, are discussed. It is shown that the strengthening of a few components of a pony truss bridge does not always lead to an increase in the load-carrying capacity of the bridge.

scholarly journals Reproducibility Practice in High Performance Computing: Community Survey Results

2021 ◽  
Author(s):  
Beth Plale ◽  
Tanu Malik ◽  
Line Pouchard
Keyword(s):  
High Performance ◽  
Manuscript Submission ◽  
Educational Goals ◽  
Technical Program ◽  
Engineering Research ◽  
The Road ◽  
Community Effort ◽  
Survey Results ◽  
Long Term Impact

The integrity of science and engineering research is grounded in assumptions of rigor and transparency on the part of those engaging in such research. HPC community effort to strengthen rigor and transparency take the form of reproducibility efforts. In a recent survey of the SC conference community, we collected information about the SC Reproducibility Initiative activities. We present the survey results in this paper. Results show that the reproducibility initiative activities have contributed to higher levels of awareness on the part of SC conference technical program participants, and hint at contributing to greater scientific impact for the published papers of the SC conference series. Stringent point-of-manuscript-submission verification is problematic for reasons we point out, as are inherent difficulties of computational reproducibility in HPC. Future efforts should better decouple the community educational goals from goals that specifically strengthen a research work’s potential for long-term impact through reuse 5-10 years down the road.

scholarly journals Analysis of Failure Mechanics in Hybrid Fibre-Reinforced High-Performance Concrete Deep Beams with and without Openings

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 101 ◽  
Author(s):  
Piotr Smarzewski
Keyword(s):  
Carrying Capacity ◽  
High Performance ◽  
High Performance Concrete ◽  
Wire Mesh ◽  
Fibre Reinforcement ◽  
Load Carrying Capacity ◽  
Deep Beam ◽  
Deep Beams ◽  
Hybrid Fibre ◽  
Load Carrying

The article presents the results of experimental- and analytical investigations of the behaviour and the load-carrying capacity of deep beams with openings (DBO) and without openings (DB) made of hybrid steel-polypropylene fibre-reinforced high-performance concrete (HFRHPC) subjected to three-point bending tests. Six deep beams 100 mm × 500 mm × 1000 mm were tested with a gradually increasing load until failure. All the specimens were tested in the same simply supported conditions. The research focused on the quantity and kind of concrete reinforcement. The deep beams with steel and polypropylene (PP) fibres were characterised by variously arranged steel bar reinforcement: vertically, horizontally, orthogonally and diagonally. The DB1, DBO1 deep beams were conventionally made with steel rod reinforcement but without fibres. The steel wire mesh reinforcement was replaced by fibre reinforcement of varying volume percentages in the remaining deep beams. The influence of the hybrid fibre content in the specimens was studied by marking the development and propagation of cracks, by recording the failure modes, and by monitoring the deflections at the bottom of the deep beam, at the mid-span and at the support. Three-dimensional measurements of strain and displacement of the deep beams without openings (DB) were performed by the non-contact optical 3D deformation measuring system ARAMIS. The experimental results were compared with the studied methods of predicting the shear strength of deep beams reinforced with hybrid fibre. The conducted study demonstrates that hybrid fibres as web reinforcement have a favourable impact on deep beam crack widths and raise the load carrying capacity of deep beams with openings.

scholarly journals EXPERIMENTAL STUDY ON LOAD CARRYING CAPACITY OF COMPOSITE HYBRID STEEL BOX GIRDER WITH RC/SW SLAB USING HIGH PERFORMANCE STEEL

2006 ◽  
Vol 62 (3) ◽  
pp. 643-655
Author(s):  
Taro TONEGAWA ◽  
Tomoki URANO ◽  
Kunitomo SUGIURA ◽  
Takashi YAMAGUCHI ◽  
Eiichi WATANABE ◽  
...  
Keyword(s):  
Experimental Study ◽  
Carrying Capacity ◽  
High Performance ◽  
Load Carrying Capacity ◽  
Box Girder ◽  
Steel Box Girder ◽  
Load Carrying ◽  
High Performance Steel

scholarly journals RESEARCH OF THE OPERATIONAL DEPENDABILITY OF THE LADA KALINA VEHICLE SYSTEMS AFFECTING TRAFFIC SAFETY

Dependability ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 31-35
Author(s):  
I. V. Denisov ◽  
A. A. Smirnov
Keyword(s):  
Traffic Safety ◽  
Road Safety ◽  
Design Theory ◽  
Technical Condition ◽  
The Road ◽  
Warranty Period ◽  
Reliability Indicators ◽  
Operation Conditions ◽  
Vladimir Oblast ◽  
Primary Test

The growing number of cars in the Russian Federation means that a large number of vehicles with different performance indicators get involved in the transportation process. One of those indicators is dependability that is a key characteristic of quality. A vehicle’s operation is the primary test of its dependability, of which the indicators depend on the used design solutions and the manufacturing process. Defects occurring at various stages of vehicle manufacture significantly affect the dependability indicators. It must be noted that a vehicle is a source of increased hazard. A failure of a vehicle in operation due to a manufacturing defect or nonobservance of operation conditions may cause an accident. Therefore it is extremely important to have at one’s disposal information on the implemented systems reliability indicators that affect active safety. In this context, the research of automotive vehicles dependability in operation is a relevant scientific task, solving which will enable managing the technical condition of vehicles and ensure traffic safety.The aim of this research was to evaluate the operational dependability of the systems that directly affect the road safety of Lada Kalina with subsequent use of the obtained information in the development of automated systems for management of automotive vehicle technical condition in operation.The methods of research are based on the theoretical foundations of vehicle maintenance, the probability theory and mathematical statistics, experimental design theory. Standard methods of processing of statistical information on the operational dependability of vehicles were used. The data was obtained from official OAO AvtoVAZ dealerships in the Vladimir Oblast. As the result of research of the operational dependability of the systems that directly affect the road safety of Lada Kalina a list of defective components in the steering, braking, chassis, lighting and signalling systems was identified. Times to failure of parts, units and assemblies that limit the vehicle dependability, as well as the primary numerical characteristics of random distribution were determined. The defects identified at early stages of operation indicate design and manufacturing flaws of Lada Kalina.Conclusions: In this paper the authors present the findings regarding the defects of the Lada Kalina systems that directly affect traffic safety. This information was obtained by means of analyzing vehicle failures within the warranty period that were recorded based on the owners’ applications to the OAO AvtoVAZ dealerships an maintenance facilities in the Vladimir Oblast. Maintenance facilities, when performing diagnostic operations as part of routine maintenance, should take into consideration the list of the least dependable vehicle components given in this paper and directly affecting the traffic safety. The manufacturing factory should take note of the indicated defects and develop a plan of their elimination, as well as timely inform the consumers of the identified warranty-specific defects and recall the products.

scholarly journals Choice of vehicles for transportation of agricultural production

2018 ◽  
pp. 116-124
Author(s):  
V.O. Timochko ◽  
R.I. Padiuka
Keyword(s):  
Carrying Capacity ◽  
Agricultural Production ◽  
Entire Range ◽  
Block Diagram ◽  
Rolling Stock ◽  
Load Carrying Capacity ◽  
The Road ◽  
Load Carrying ◽  
Loading And Unloading ◽  
Range Of Variation

Agricultural cargoes, by their physical and mechanical pro-perties, loading and unloading methods; conditions of transportation and sto-rage, the possibility of using the load carrying capacity of the rolling stock, their preservation during transportation, the degree of danger during loading, unloading and transportation cover the entire range of variation. This entails the need to attract practically all types of transportation means for their transportation. The structure of the order for transportation is substantiated, the types of agricultural cargoes analyzed and a matrix of the choice of the type of the vehicle according to the characteristics of the cargo is constructed, which enables us to substantiate the expediency of using the vehicles. A block diagram of the algorithm for choosing the types of vehicles for the transportation of agricultural cargoes has been developed to take into account the main constraints, namely the characteristics of the cargo, the restrictions imposed by the road conditions of the route and the peculiarities of loading, the urgency of transportation and the size of the consignment. To execute a pre-ordered order, a vehicle is selected that satisfies the constraints and ensures a minimum freight cost.

scholarly journals Span length-dependent load-carrying capacity of normal concrete - HPFRC beams

2021 ◽  
Vol 15 (2) ◽  
pp. 26-37
Author(s):  
Duy-Liem Nguyen ◽  
Tri-Thuong Ngo ◽  
Ngoc-Thanh Tran
Keyword(s):  
Carrying Capacity ◽  
High Performance ◽  
Shear Failure ◽  
Fiber Reinforced Concrete ◽  
Bending Test ◽  
Load Carrying Capacity ◽  
Span Length ◽  
Load Carrying ◽  
Beam Shear ◽  
Normal Strength

The dependence of load-carrying capacity on span length of beams, which contained a combination of normal strength concrete (NC) - High-performance fiber-reinforced concrete (HPFRC), was investigated in this study. The used HPFRC contained 1.0 vol.% long hooked blended with 0.5% short smooth fibers. Two types of span length were designed as 300 mm and 450 mm while dimensions of beam sections were identical with depth × width of 150 × 150 mm2. Each span included five types of partial structural materials as follows: Short 1 and Long 1 had no reinforcement with full of section using HPFRC, Short 2 and Long 2 had reinforcements with a full of section using HPFRC, Short 3 and Long 3 had reinforcements with a half of section using HPFRC at beam bottom, Short 4 and Long 4 had reinforcements with a third of section using HPFRC at beam bottom, Short 5 and Long 5 had reinforcements with a half of section using HPFRC at beam top. All beams were tested under three-point bending test. The shorter beam generally exhibited the greater load-carrying capacity than the long beam using same section type. The shear failure mode was dominant in case of the span/depth ratio less than 3. The HPFRC located at bottom of beam created the more effectiveness for enhancement of load-carrying capacity and stiffness of the beam, in comparison with the HPFRC placed at top of beam. The most effective zone of beam for HPFRC strengthening was at extreme tension fiber. Keywords: high-performance; composite beam; shear failure; bending resistance; load-carrying capacity.

scholarly journals Reproducibility Practice in High Performance Computing: Community Survey Results

2021 ◽  
Author(s):  
Beth Plale ◽  
Tanu Malik ◽  
Line Pouchard
Keyword(s):  
High Performance ◽  
Manuscript Submission ◽  
Educational Goals ◽  
Technical Program ◽  
Engineering Research ◽  
The Road ◽  
Community Effort ◽  
Survey Results ◽  
Long Term Impact

The integrity of science and engineering research is grounded in assumptions of rigor and transparency on the part of those engaging in such research. HPC community effort to strengthen rigor and transparency take the form of reproducibility efforts. In a recent survey of the SC conference community, we collected information about the SC Reproducibility Initiative activities. We present the survey results in this paper. Results show that the reproducibility initiative activities have contributed to higher levels of awareness on the part of SC conference technical program participants, and hint at contributing to greater scientific impact for the published papers of the SC conference series. Stringent point-of-manuscript-submission verification is problematic for reasons we point out, as are inherent difficulties of computational reproducibility in HPC. Future efforts should better decouple the community educational goals from goals that specifically strengthen a research work’s potential for long-term impact through reuse 5-10 years down the road.

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