please answer all parts **Problem 4 - Fire Resistance of Concrete-Filled HSS Columns**A square concrete-filled HSS column is to be used in an industrial building, and the design is to be based on ASTM E-119 standard fire exposure. The HSS section is 254×254×8.0 mm with a length of 4100 mm, and it is fixed at both ends. The concrete is made of carbonate aggregate, with a compressive strength of 40 MPa. The design service load on the column is 870 kN. Determine, using a simplified formula, the fire resistance of the HSS column for these cases:(a) Plain concrete filling. (b) Reinforced concrete filling, reinforcement ratio of 3%. (c) Fiber reinforced concrete filling.

Answered: using simplified formula, the fire…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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please answer all parts

**Problem 4 - Fire Resistance of Concrete-Filled HSS Columns**

A square concrete-filled HSS column is to be used in an industrial building, and the design is to be based on ASTM E-119 standard fire exposure. The HSS section is 254×254×8.0 mm with a length of 4100 mm, and it is fixed at both ends. The concrete is made of carbonate aggregate, with a compressive strength of 40 MPa. The design service load on the column is 870 kN. Determine, using a simplified formula, the fire resistance of the HSS column for these cases:

(a) Plain concrete filling.
(b) Reinforced concrete filling, reinforcement ratio of 3%.
(c) Fiber reinforced concrete filling.

Expert Solution

Step 1

Hollow Steel Sections are used widely because of their high compressive strength.

Sometimes these sections are filled with concrete in order to increase their strength.

Filling concrete not only increases their strength, but also increase the fire resistance of these sections, Which otherwise would have to be obtained at an additional cost.

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