The focal point of this application is to assess strain due to a falling object such as a piece of construction equipment, material or vehicle falls over an operating pipeline.
Some of the limitations of this calculation are as follows: drop height, maximum load at the soil surface, type of soil, etc. to determine the penetration depth.
Maximum Impact Load:
Where:
πΏπππ₯Β β Maximum Load at Soil Surface(lbs)
πΒ β Weight of Falling Object(lbs)
π»πΒ β Drop Height(in)
ππΒ β Least Horizontal Radius of Falling Object(in)
πΊΒ β Soil Shear Modulus(psi)
π£Β β Poissonβ²s Ratio for Soil(dimentionless)
For large strains, near the region of impact, the shear modulus is one tenth the low amplitude shear modulus.
Where:
ππ Β β Shear Wave Velocity of Near Surface Soils(in/sec)
πΒ β Mass Density of Near Surface Soil(Unit Weight of Soil/Acceleration due to Gravity)(lb.sec2/in4)
Penetration Depth:
Where:
π₯πΒ β Penetration Depth(ft)
ππβWeight per Unit Impact Area(lb/ft2)
πΒ β Impact VelocityΒ
πΒ β Empirical Coefficient of Penetration
(π=0.0367 for Sandy Soil, k=0.0482 for Soil with Vegitation, k=0.0732 for Soft Soil)
Input Parameters
Select the Maximum Impact Load & Penetration Depth application from the Steel Pipe – Design and Stress Analysis module.
To create a new case, click the β+β button
Enter Case Name, Location, Date and any necessary notes.
Fill out all required fields.
Make sure the values you are inputting are in the correct units.
Click the CALCULATE button.
Weight of Falling Object(lbs.)
Drop Height(ft), Impact Area Diameter(ft)
Unit Weight of Soil(lbs./ftΒ³)
Poissonβs Ratio for Soil
Shear Wave Velocity of Near Surface Soil(in/sec)
Empirical Coefficient of Penetration.
Outputs/Reports
View the results.
If an input parameter needs to be edited be sure to hit the CALCULATE button after the change.
To SAVE, fill out all required case details then click the SAVE button.
To rename an existing file, click the SAVE As button. Provide all case info then click SAVE.
To generate a REPORT, click the REPORT button.
The user may export the Case/Report by clicking the Export to Excel/PowerPoint icon.
To delete a case, click the DELETE icon near the top of the widget.