Plate Girder Stiffener: Preventing Web Compression Buckling
In structural engineering, plate girders are deep beams used for large spans. The web plate of a plate girder is susceptible to different types of instability under load.
Function of Horizontal Stiffeners
Horizontal stiffeners are specifically added to the web plate of a plate girder to address a particular failure mode:
- Prevent Compression Buckling: When a plate girder bends, the top portion of the web experiences compressive stress, similar to the top flange. If the web plate is relatively thin and deep (high slenderness ratio), it can buckle locally under this compression before the material yields. Horizontal stiffeners act as intermediate supports along the web's depth, increasing its resistance to this compressive buckling.
Why Other Options Are Incorrect
- Yielding: Yielding is a material failure due to exceeding the stress limit. It's primarily managed by selecting appropriate steel grades and ensuring the flanges and web have sufficient cross-sectional area. Stiffeners do not directly prevent yielding.
- Shear Buckling: Shear buckling is a concern for the web plate, especially under transverse loads. However, vertical stiffeners are typically used to prevent shear buckling by stiffening the web against shear deformation.
- Excessive Deflection: Deflection is primarily controlled by the girder's stiffness (moment of inertia), which is significantly influenced by the size of the flanges and the overall depth of the girder. While stiffeners add some stiffness, their main purpose is stability (buckling), not controlling overall deflection.
Therefore, the primary reason for providing horizontal stiffeners is to prevent the web plate from buckling under compression.
The correct option is Compression buckling of web plate.
Similar Questions
- The method for disposal of biodegradable component of solid waste is :
- A clay sample has a void ratio of 0.5 in dry state. The specific gravity of soil solids is 2.5. What is the shrinkage limit of the soil ?
- Proctor's compaction test for the maximum dry density of a certain soil gave the results as $1.8 \text{ gm/cc}$ and Optimum Moisture Content (OMC) is 15%. The specific gravity of the clay soil grain was 2.7. What was the saturation degree for this soil ?
- The load carrying capacity of an individual friction pile is $300 \text{ kN}$. What is the total load carrying capacity of group of 10 such piles with a group efficiency factor of 0.8 ?
- In a clayey soil having $100 \text{ kN/m}^2$ as unit cohesion and $15 \text{kN/m}^3$ as unit weight, an excavation is made with a vertical face. Taking Taylor's stability number as 0.3, what is the maximum depth of excavation so that the vertical face remains stable ?
- A strata of $3 \text{ m}$ thick fine sand has a void ratio of 0.5 and specific gravity of 2.5. For a quick sand condition to develop in this strata, the flowing in upward direction would require a head of :
- The probability that a student passes only in Hindi is $\frac{1}{4}$. The probability of the student passes only in English is $\frac{5}{9}$. The probability that the student passes in both of these subjects is $\frac{1}{9}$. The probability that the student will pass in at least one of these two subjects is :
- By using Cauchy integral theorem, the value of an integral (integration being taken in counter clock wise direction) $\oint \frac{Z^3-4}{3Z-i} dZ$ is :
- A steel plate is $400 \text{ mm}$ wide and $10 \text{ mm}$ thick. A rivet of nominal diameter $20 \text{ mm}$ is driven. The net sectional area of the plate is :
- The Centre to Centre maximum distance between rivets in tension member of thickness $12 \text{ mm}$ is :
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
