Are diaphragms necessary in the design of concrete box girder bridges?

Saad Iqbal | 🗓️ Modified: May 27, 2016 | ⏳ Read Time: 1 min | 👁 Post Views: 804

Diaphragms are adopted in concrete box girder bridges to transfer loads from bridge decks to bearings. Since the depth of diaphragms normally exceeds the width by two times, they are usually designed as deep beams. However, diaphragms may not be necessary in case bridge bearings are placed directly under the webs because loads in bridge … Read more

What is the advantage of sliding bearings over roller bearings?

Saad Iqbal | 🗓️ Modified: May 27, 2016 | ⏳ Read Time: 1 min | 👁 Post Views: 664

In roller bearing for a given movement the roller bearing exhibit a change in pressure centre from its original position by one-half of its movement based on David J. Lee.  However, with sliding bearing a sliding plate is attached to the upper superstructure and the moving part of bearing element is built in the substructure. … Read more

What is escalator? How Escalators Work? [VIDEO]

Saad Iqbal | 🗓️ Modified: May 27, 2016 | ⏳ Read Time: 1 min | 👁 Post Views: 805

An escalator is a type of vertical transportation in the form of a moving staircase – a conveyor transport device for carrying people between floors of a building. The device consists of a motor-driven chain of individually linked steps that move up or down on tracks, allowing the step treads to remain horizontal. Escalators are … Read more

Why is the span length ratio of end span/approach span to its neighboring inner spans usually about 0.75?

Saad Iqbal | 🗓️ Modified: May 27, 2016 | ⏳ Read Time: 1 min | 👁 Post Views: 777

From aesthetic point of view, an odd number of spans with a decrease in length in the direction of abutment is desirable. Moreover, spans of equal length are found to be boring. However, the arrangement of irregular span lengths is not recommended because it gives a feeling of uneasiness. From structural point of view, for … Read more

In the design of a simply supported skew bridge, which direction of reinforcement should be provided?

Saad Iqbal | 🗓️ Modified: May 27, 2016 | ⏳ Read Time: 1 min | 👁 Post Views: 822

In the conventional design of steel reinforcement for a simply supported skew bridge, a set of reinforcement is usually placed parallel to free edge while the other set is designed parallel to the fixed edge. However, this kind of arrangement is not the most efficient way of placing the reinforcement. The reason is that in … Read more

🔧 Concrete

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  • In mechanical properties of various solid materials, two of the most important concepts are that of stress and strain. It is crucial in understanding how an object behaves or reacts when you apply a force on it. Stress and strain help in identifying the strength, deformation, and various other mechanical properties of the object. If ... Read more

  • When it comes to building your dream home, one of the fundamental decisions you’ll face is choosing the right construction material. Among the myriad options available, residential concrete stands out as a reliable and versatile choice. In this comprehensive guide, we will delve into the comparisons between residential concrete and other popular construction materials, weighing ... Read more

  • The early stages of a Value Methodology (VM) study are crucial, and “Strategic Planning in VM: Navigating the Pre-Workshop Phase” provides an in-depth examination of the significant role played by strategic planning during this phase. Careful planning and foresight are essential when establishing foundational strategies and objectives, which set the tone and direction for the ... Read more

  • The versatility and durability of a material matter when it comes to construction projects. One crucial component is concrete, which works well for different structures regardless of the project size. You can use it for large-scale construction ventures or minor DIY projects at home, but understanding its fundamentals matters. This makes you have a robust ... Read more

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