impact value for concrete brigde
  • Pendulum impacts into concrete bridge barriers …

    This paper presents the results of a pendulum impact test that was carried out on full-scale types PL-2 and PL-3 concrete bridge barriers reinforced with glass fibre reinforced polymer (GFRP) bars. A new corrosion-free connection between the barrier wall and the slab using GFRP bent bars was investigated. For comparison purposes, the impact test was also performed on identical concrete ...

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  • Aggregate Crushing Value - Civil Engineering

    AGGREGATE CRUSHING VALUE This test helps to determine the aggregate crushing value of coarse aggregates as per IS: 2386 (Part IV) – 1963. The apparatus used is Cylindrical measure and plunger, Compression testing machine, IS Sieves of sizes – 12.5mm, 10mm and 2.36mm . Procedure to determine Aggregate Crushing Value i) The aggregates passing through 12.5mm and retained on …

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  • 12 Types of Loads Considered for Design of …

    To consider impact loads on bridges, an impact factor is used. Impact factor is a multiplying factor which depends upon many factors such as weight of vehicle, span of bridge, velocity of vehicle etc. The impact factors for different IRC loadings are given below. For IRC Class AA Loading and 70R Loading. Span: Vehicle type: Impact factor: Less than 9 meters: Tracked vehicle: 25% up to 5m and ...

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  • CHLORIDE THRESHOLD VALUES FOR SERVICE LIFE DESIGN

    values for ordinary concrete with silica fume and/or fly ash can be calculated from a formula based on data from the literature. When new types of concrete shall be evaluated the presented laboratory test method can be used. 1. INTRODUCTION The determination of chloride threshold values, i.e. the chloride concentration at which mild steel reinforcement will start corroding in concrete is the ...

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  • BRIDGE TECHNICAL DIRECTION BTD2008/12

    concrete structures in acid sulfate soils table of contents 1 introduction 1 2 acid sulfate soils (ass) 1 2.1 general 1 2.2 locations in nsw 2 2.3 indicator – "ph" 2 2.4 hazards to structures 3 2.5 deterioration of concrete structures 4 3 exposure classifications 5 3.1 general 5 3.2 as 5100.5 bridge design 5 3.3 as 3600 concrete structures 6 3.4 as 3735 concrete structures for retaining ...

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  • J11 Scoping the environmental impacts of bridges and culverts

    construction of bridges may impact upon the local environment and river dynamics particularly where instream span supports are required. The construction of culverts may be required to contain the flow of a watercourse and to channel it below or around man-made structures. The type of culvert used will depend upon the engineering requirements of the site. Culvert designs may range from steel ...

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  • INVESTIGATION ON IMPACT LOADS FOR TEST LEVEL 4 OF CONCRETE …

    INVESTIGATION ON IMPACT LOADS FOR TEST LEVEL 4 OF CONCRETE BRIDGE BARRIERS Fadaee, Morteza1,3, Sennah, Khaled2 1 Ph.D. Student, Ryerson University, Toronto, Canada 2 Professor, Ryerson University ...

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  • Bridge Economic Impact Issues Affect People …

    20.08.2018· Bridge economic impact issues go beyond simple cash flow. Bridges connect people in different communities, allowing them to interact for work or play. This capacity is especially essential for areas where one town has an abundance of raw materials and another has a labor force in need of work. In this way, both people and communities can support one another. What's to Come for Our Nation's ...

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  • Environmental Impact Optimization of …

    The main objective of this research is to integrate environmental impact optimization in the structural design of reinforced concrete slab frame bridges in order to determine the most environmental-friendly design. The case study bridge used in this work was also investigated in a previous paper focusing on the optimization of the investment cost, while the present study focuses on ...

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  • The Impact-Echo Method - NDT

    Impact-echo is based on the use of transient stress waves generated by elastic impact. A diagram of the method is shown in Figure 2. A short-duration mechanical impact, produced by tapping a small steel sphere against a concrete or masonry surface, is used to generate low-frequency stress waves that propagate into the structure and are reflected by flaws and/or external surfaces.

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  • Bridge Construction Techniques and Engineering …

    Concrete bridges were being cast at the desired place, instead of being precast. Huge bridge elements made from bars and small sections were used, and not rolled as one part. Before the 1980s, the majority of bridge designs included expansion joints for decks, including expansion and fixed support bearings. This technique was used to permit structural expansion and contraction. However, the ...

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  • Reinforced Concrete Bridges

    The Concrete Reinforcing Steel Institute is proud to honor five great concrete bridges built between 1990 and 2000. Each stands as a solid testament to concrete's versatility, its cost effectiveness, and its durability. From arches to swing leaves, from foundation to superstructure, concrete is clearly a superior bridge-building material. Golden Gate Park, in San Francisco California, is ...

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  • Pendulum impacts into concrete bridge barriers …

    This paper presents the results of a pendulum impact test that was carried out on full-scale types PL-2 and PL-3 concrete bridge barriers reinforced with glass fibre reinforced polymer (GFRP) bars. A new corrosion-free connection between the barrier wall and the slab using GFRP bent bars was investigated. For comparison purposes, the impact test was also performed on identical concrete ...

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  • Bridge Design| Bridge Design Calculations

    Design calculations for a hypothetical two span reinforced concrete bridge deck to illustrate the requirements of BS 5400 Part 2 loading and Part 4 for design of concrete bridges. A grillage analysis is undertaken; input load cases and output results are included. The example also demonstrates how spreadsheets can be used effectively to reduce the design time taken with the repetative ...

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  • The Importance of Concrete Recycling

    29.12.2017· Road and bridge demolition generated 157.4 million tons of this amount. Over 140 million tons of concrete are recycled annually, according to the Construction & Demolition Recycling Association. With pressure on landfills continuing to mount, the diversion of C&D materials in general, and concrete, in particular, remains an import area of interest to policymakers.

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  • Design of reinforced concrete bridges | ICE …

    10.08.2015· Reinforced concrete is also used for deck slabs and substructures for bridges with main elements of steel or prestressed concrete. The key design criteria and checks required by codes are the same regardless of the form of construction. These are for ultimate strength in flexure, shear and torsion and for serviceability issues including crack widths and service stresses. For elements with ...

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  • Evaluation of AASHTO Suggested Design Values …

    Evaluation of AASHTO Suggested Design Values for Reinforced Concrete Bridge Piers Under Vehicle Collisions Show all authors. Steven AuYeung . Steven AuYeung. Department of Civil, Construction, and Environmental Engineering, Iowa State University, 136 Town Engineering Building, Ames, IA 50011 See all articles by this author. Search Google Scholar for this author, Alice Alipour. Alice Alipour ...

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  • Environmental impact of concrete - Wikipedia

    The environmental impact of concrete, its manufacture and applications, are complex.Some effects are harmful; others welcome. Many depend on circumstances. A major component of concrete is cement, which has its own environmental and social impacts and contributes largely to those of concrete.. The cement industry is one of the main producers of carbon dioxide, a potent greenhouse gas.

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  • Bridge Construction Methods, Asset …

    Building a bridge is a complex undertaking requiring knowledge and expertise. Several variables, including engineering constraints, costs, and environmental impacts come into play when deciding which construction method to use and bridge type to build.

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  • Positive and Negative Impact of Bridges - Pros …

    03.07.2018· The positive impact of bridges: The connection: Bridges in general help to connect two distant points in a straight line and as a result, reduce the distance taken to travel to the destination. While this effect is negligible in smaller bridges, it is much more noticeable over long distances and even helps connect islands to the mainland. Cost effective way of transportation: Most of the long ...

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