An elastomeric bearing pad is used to support a bridge girder as shown. The bearing pad provides flexibility in the horizontal direction to accommodate thermal expansion and earthquake motions. The shear modulus of the bearing pad is G = 1.50 MPa. The beam must not displace horizontally more than 25 mm when a load of P = 45 kN is applied as shown. Determine the maximum thickness t that can be used for the bearing pad. Assume a = 300 mm and b = 420 mm. b

Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter1: Tension, Compression, And Shear
Section: Chapter Questions
Problem 1.8.11P: A joint between two glass plates A and B is filled with a flexible epoxy that bonds securely to the...
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**Elastomeric Bearing Pad Analysis for Bridge Girder Support**

An elastomeric bearing pad is used to support a bridge girder as shown in the diagram. This bearing pad offers flexibility in the horizontal direction to accommodate thermal expansion and earthquake motions. The shear modulus of the bearing pad is \( G = 1.50 \text{ MPa} \).

The beam must not displace horizontally by more than 25 mm when a load of \( P = 45 \text{ kN} \) is applied as illustrated.

Determine the maximum thickness \( t \) that can be used for the bearing pad. Assume the following dimensions:
- \( a = 300 \text{ mm} \)
- \( b = 420 \text{ mm} \)

**Diagram Explanation:**
The diagram shows a horizontal beam supported by an elastomeric bearing pad depicted in dark gray. The bearing pad has dimensions \( a \) (width) and \( b \) (length) as labeled. A horizontal force \( P \) is shown acting on the beam.

**Calculation:**
To calculate the maximum allowable thickness \( t_{\text{max}} \), use the following box to input your result:

**Answer:**
\[ t_{\text{max}} = \_\_\_\_\_\_\_ \ \text{mm} \]
Transcribed Image Text:**Elastomeric Bearing Pad Analysis for Bridge Girder Support** An elastomeric bearing pad is used to support a bridge girder as shown in the diagram. This bearing pad offers flexibility in the horizontal direction to accommodate thermal expansion and earthquake motions. The shear modulus of the bearing pad is \( G = 1.50 \text{ MPa} \). The beam must not displace horizontally by more than 25 mm when a load of \( P = 45 \text{ kN} \) is applied as illustrated. Determine the maximum thickness \( t \) that can be used for the bearing pad. Assume the following dimensions: - \( a = 300 \text{ mm} \) - \( b = 420 \text{ mm} \) **Diagram Explanation:** The diagram shows a horizontal beam supported by an elastomeric bearing pad depicted in dark gray. The bearing pad has dimensions \( a \) (width) and \( b \) (length) as labeled. A horizontal force \( P \) is shown acting on the beam. **Calculation:** To calculate the maximum allowable thickness \( t_{\text{max}} \), use the following box to input your result: **Answer:** \[ t_{\text{max}} = \_\_\_\_\_\_\_ \ \text{mm} \]
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