Vibration dampers can be used to eliminate the resonant frequency of buildings. Such a vibration damper is used in one of the world's tallest skyscrapers, the "Taipei 101". The oscillation of the sphere counteracts the oscillation of the building.
Model Used in
- WIN | 04/2024 – What's New in RFEM 6 and RSTAB 9?
- Dynamic and Seismic Analysis of Structures | RFEM 6 & RSTAB 9 by Dlubal Software
- WIN | 05/2024 – What's New in RFEM 6 and RSTAB 9?
- Dynamic Calculations with Dlubal Software
- Virtual Reality (VR) & Augmented Reality (AR) and Structural Models - Is That Possible?
Tuned Mass Damper
Number of Nodes | 700 |
Number of Lines | 840 |
Number of Members | 667 |
Number of Surfaces | 30 |
Number of Solids | 0 |
Number of Load Cases | 3 |
Number of Load Combinations | 1 |
Number of Result Combinations | 0 |
Total Weight | 805.978 tons |
Dimensions (Metric) | 9,928 x 16,200 x 9,928 m |
Dimensions (Imperial) | 32.57 x 53.15 x 32.57 feet |
You can download this structural model to use it for training purposes or for your projects. However, we do not assume any guarantee or liability for the accuracy or completeness of the model.
![Vibration Analysis (Source: [3])](/en/webimage/009798/467822/01-de-png.png?mw=512&hash=2551750327252c0e49d549ec0d9fb2579bfaa885)
The vibration design of cross‑laminated timber plates often governs for wide-span ceilings. The advantage of timber as a lighter material compared to concrete is turned into a disadvantage here, since a high mass is advantageous for a low natural frequency.
![Structural Modeling in RFEM](/en/webimage/008825/703002/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
When introducing and transferring horizontal loads such as wind or seismic loads, increasing difficulties arise in 3D models. To avoid such issues, some standards (for example, ASCE 7, NBC) require the simplification of the model using diaphragms that distribute the horizontal loads to structural components transferring loads, but cannot transfer bending themselves (called "Diaphragm").
![Determination of Maximum Horizontal and Vertical Loads to Calculate Stability Coefficient](/en/webimage/009097/2416928/01-en-png.png?mw=512&hash=e5b08a40fd9a5a16825be6182b3138f78627561e)
RFEM offers the option to perform a response spectrum analysis according to ASCE 7-16. This standard describes the determination of seismic loads for the American market. It might happen that the P-Delta effect has to be considered due to the stiffness of the entire structure in order to calculate the internal forces and carry out the design.
![KB 001883 | Plate Girder Design According to AISC 360-22 in RFEM 6](/en/webimage/051561/3980997/im1.png?mw=512&hash=b8237709c4f30213fac51d86d32a42bddde72f03)
Plate girder is an economical choice for long spans construction. I-section steel plate girder typically has a deep web to maximize its shear capacity and flange separation, yet thin web to minimize the self-weight. Due to its large height-to-thickness (h/tw) ratio, transverse stiffeners may be required to stiffen the slender web.
![RF-/DYNAM Pro - Forced Vibrations Add-on Module for RFEM/RSTAB | Analysis of Forced Vibrations](/en/webimage/002843/2521824/file_1200x900.jpg?mw=512&hash=625e0e3c9d28d6934325dbc0c5e1db04243b001d)
- Combination of user-defined time diagrams with load cases or load combinations (nodal, member, and surface loads, as well as free and generated loads, can be combined with time-variable functions)
- Combination of several independent excitation functions
- Extensive library of seismic events (accelerograms)
- Linear implicit Newmark analysis or modal analysis in time history
- Structural damping using Rayleigh damping coefficients or Lehr's damping
- Direct import of initial deformations from a load case or combination
- Graphical display of results in a time history diagram
- Export of results in user-defined time steps or as an envelope
- Response spectra of numerous standards (ASCE 7-16, NBC 2015, etc.)
- User-defined response spectra or those generated from accelerograms
- Direction-relative response spectrum approach
- Manual or automatic selection of the relevant mode shapes of response spectra (5% rule of EC 8 applicable)
- Result combinations by modal superimposition (SRSS or CQC rule) and by direction superimposition (SRSS or 100% / 30% rule)
![Add-on "Steel Joints for RFEM 6" | Component Library](/en/webimage/043097/3898884/steel_joints_components.png?mw=512&hash=e4f835906155863fc7019d5043b22e553dc766f9)
- Numerous component types, such as base and end plates, web angles, fin plates, gusset plates, stiffeners, tapers, or ribs for easy input of typical connection situations
- Universally applicable basic components (such as plates, welds, bolts, auxiliary planes) for modeling complex connection situations
- Graphical display of the connection geometry with dynamic updating during the input
- Wide range of cross-section shapes: I-sections, U-sections, angles, T-sections, hollow sections, built-up cross-sections and thin-walled sections
- Library in the Dlubal Center with a large number of program-side template connections, including user-defined templates
- Automatic adaptation of the connection geometry based on the relative arrangement of the components to each other – even in case of subsequent editing of the structural components
![Feature 002820 | Limit Plastic Strain for Welds](/en/webimage/050344/3881226/1.png?mw=512&hash=9d7f6c198b6d4ae6ee8f2fa8bca75f85579e14c9)
In the ultimate configuration of the steel joint design, you have the option to modify the limit plastic strain for welds.
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