Structural Dynamics-DMF 1
When DMF is 1, dynamic load does not magnify the effect of equivalent static load. To achieve this, the natural frequency of structure needs to bec…
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Structural Dynamics-DMF
Dynamic magnification factor can determine structure’s deflection under dynamic load. Such deflection is calculated by multiplying DMF with the def…
Structural Dynamics-Logarithmic Decrement
One of the ways to determine a structure’s damping is by using logarithmic decrement method. The input for the method is structure’s amplitude of v…
Structural Dynamics-Critical Damping
If structure’s damping is strong, no vibration may occur because after unloading, work done may be totally dissipated while the structure moving towa…
Structural Dynamics-Natural Frequency
A structure tends to vibrate in its natural frequency without having external force acting on it. When external force is exerted in the same freque…
Structural Dynamics-DOF
In short, degree of freedom implies the number of mass component in a system. For a multi—storey structure, each storey is a degree of freedom and …
Structural Dynamics-Equilibrium
When force acts on a stationary body and causes motion: Inertial force arises from change in inertia due to acceleration. Friction occurs at cont…
Structural Dynamics-Damping Component
c component is a structure's ability to reduce vibration over time. It is fundamentally the conversion of kinetic energy to other forms of energ…
Structural Dynamics-Stiffness Component
k component defines element deformation when resisting load. High stiffness element attracts more load and possesses high ability to restore its o…
Structural Dynamics-Mass Component
m component is lumped mass of building elements that do not help in resisting dynamic load. Under lateral dynamic load, beam and slab will be treate…
Structural Dynamics-Components
To analyse a dynamics problem, the structure needs to be idealized first. Idealization reduce the structure into three main components of dynamic sys…
Structural Dynamics-Types of load
Dynamic loads are either predictable or random. Another way to categorize the loads is based on its recurrence. Loading that repeatedly exerted …
Structural Dynamics-Static & Dynamic Loads
Structural dynamics is a study of structural response under dynamic load. Dynamic load varies with time in term of direction and magnitude. Under…