Shaft3D – A powerful software for foundation design and analysis

Shaft3D software is created for simplifying the pile design process specifically for the drilled shafts or caisson type foundations. The software will allow you to perform multi tasking like shaft axial capacity analysis, lateral analysis and concrete design etc.

With Shaft3D, it is possible to design caisson foundations for windmills, transmission lines, utility lines or any other structure requiring drilled pier foundations quickly.

Shaft3D can enhance your productivity considerably through its windows-based, easy-to-learn graphical interface and its capacity to offer a complete solution for different types of analyses.

Given below, some useful features of the software :-

• International Design Codes: Compatible with various concrete design codes to finish your global projects efficiently.
• User Defined Parameters: There are various design options like shaft boundary conditions, choice of safety factors in end bearing, skin friction and pullout, choice of axial capacity methods and lot of others to fulfill numerous project specifications.
• Graphical Input of Soil Profile: Facilitates input of unrestricted number of soil layers, each with various unique set of soil properties graphically permitting you to visualize your soil profile.
• Soil Property Values: Offers a series of values of soil properties like cohesion, angle of internal friction with selection of the soil type authorizing you to complete a preliminary design devoid of detailed soil report.

• Load Cases and Combinations: Produces generally used load cases and combinations for shaft design that saves design time considerably.

• Multiple Analyses: Accomplishes axial capacity analysis, lateral analysis and concrete design in one combined surrounding.
• Axial Capacity Methods: Facilitates to choose from several axial capacity methods so that it is possible to fulfill the need of your company or client.

• Lateral Analysis: Accomplish lateral analysis with finite element analysis demonstrating vital information like deflections, shears, bending moments along the length of the shaft allowing you to explore with different “what-if” scenarios.
• Concrete Design: Execute concrete capacity design for axial loads and biaxial bending that offers you a complete geotechnical and structural solution.
• Rebar Layouts: Generates several rebar layouts with customization options.

• Material Quantities: Produces material quantities to perform precise cost estimates for your customers each time at each phase of the project.
• Detailed Design Sketches: Creates a detailed design sketch with plan, elevation and section to sum up the completed design efficiently.

• Multiple Reporting Options: Produces various types of customizable reports to utilize them for your internal or client requirements.

To know the additional features, go through the following link dimsoln.com

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Published By
Rajib Dey
www.constructioncost.co
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Details of Punching Shear in slabs and foundations

Definition of Punching Shear?
The punching shear refers to a failure system that occurs in structural members like slabs and foundation with presence of shear under the action of concentrated loads.

The action of concentrated loads remains on a minor area in the structural members. Normally, this reaction is the one from the column that behaves against the slab.

The punching shear failure mechanism can be applied in normal floor slabs, flat slabs, and in the foundation slabs underneath the column.

Punching Shear in Reinforced Concrete Slabs: The Punching shear in reinforced concrete slabs is treated as a 2D analog of the shear detected in beams. Due to unforeseen crack, this type of failure happens. It becomes difficult to control this crack by making use of main reinforcement.

Therefore, the ultimate load capacity of the structure is decreased underneath the flexural capacity with the action of shear. The punching shear is not so important with regards to beam shear.

In slabs, the punching shear happens if there are high values of concentrated loads for slabs. These load ranges from the wheel loads on the bridge slabs or the loads from over floors on the columns that support the slab floors.

Calculations in Punching Shear: If it is required to compute punching shear for the design, it is dependent on the punching shear force that is punching against the density of the slab or foundation. It can occur only if shear remains separately in the system. It becomes impossible, if any form of moment is in the pedestal or the column.

The Maximum Punching Shear Stress is obtained on the basis of the punching shear failure cone and the applied values of shear and moments. The ‘d’ denotes the effective depth of the slab. The punching shear perimeter is developed at a gapping of d/2 from the edges of the column or the pedestal. In the example given in fig 1, Dped stands for the depth of the pedestal.

1. Proper examinations should be done to ensure that the concrete is very durable.
2. If there is not sufficient strength for the concrete, verify whether the amount of supplied reinforcement is proper.
3. If it is improper, it will be better to adjust the form of the structure.

The form of the structure can be adjusted in the following ways:

1. Raise the depth of the slab
2. Expand the column size
3. Assimilation of drop panels
4. Creation of Flared column heads
5. Other foreign codes are recommended to practice other liberal designs

Different failure zones are described in the example given in figure-2 that is based together with the area where the reinforcement should be arranged. Normally vertical and traverse failure lines can be provided. It becomes difficult to identify where the failure can take place. Therefore, each prospective failure plane should have been reinforced.

Read more

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Published By
Rajib Dey
www.constructioncost.co
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