RF-/TIMBER AWC | Design

Using an example of a steel fiber-reinforced concrete slab, this article describes how the use of different integration methods and of a different number of integration points affects the calculation result.

When it comes to wind loads on building type structures as per ASCE 7, numerous resources can be found to supplement design standards and aid engineers with this lateral load application. However, engineers may find it more difficult to find similar resources for wind loading on non-building type structures. This article will examine the steps to calculate and apply wind loads as per ASCE 7-22 on a circular reinforced concrete tank with a dome roof.

In order to correctly design a downstand beam or a T-beam in RFEM 6 using the Concrete Design add-on, it is essential to determine the flange widths for the rib members. This article describes the input options for a two-span beam and the calculation of the flange dimensions according to EN 1992-1-1.

• Footfall Analysis links with RFEM, using the model geometry from there, thus the user is not required to create a second model specifically for footfall analysis
• Allows the user to analyze any type of structure for footfall analysis, irrespective of the shape, material, or use
• Quick and accurate predictions of resonant and impulsive (transient) responses
• Cumulative measurement of vibration levels – VDV analysis
• Intuitive output enabling the engineer to advise improvements of critical areas in a cost-effective way
• Pass/fail limit check in accordance with BS 6472 and ISO 10137
• Selection of excitation forces: CCIP-016, SCI P354, AISC DG11 for floors and stairs
• Frequency weighting curves (BS 6841)
• Quick investigation for full model or specific areas
• Vibration Dose Analysis (VDV)
• Adjusting the minimum and maximum walking frequencies as well as the walker’s weight
• User input damping values
• Varying the number of footfalls for resonant response, user input or software calculated
• Environmental response limit based on BS 6472 and ISO 10137

• Overall maximum response factors and critical nodes
• Resonant analysis (maximum response factor, RMS acceleration, critical node, critical frequency)
• Impulsive (transient) analysis (maximum response factor, peak acceleration/velocity, RMS acceleration/velocity, critical node, critical frequency)
• Vibration dose values for both resonant and impulsive analyses

Charts

• Response factor vs walking frequency
• Mass participation vs eigenmodes
• Velocity time history

Activating 'Show Form-Finding' in the shortcut menu leads to an automatic preliminary form-finding according to the saved form-finding properties when you change the structure of membrane surfaces. This interactive graphics mode is based on the force density method.

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