|Revision item in Engineer's Studio® Ver 2.00.00 are as followings.
|Specifications For Highway Bridges 2012|
|The contents of Specifications For Highway Bridges 2012 "Seismic design" has been greately changed. For the dynamic analysis of this product, "Reporting the seismic waveform of new SFHB", "l|ำ of of reinforcement concrete section" and "l|ำ of steel pier cross section" are the supported item and the verification of residual displacement is now supported as well.
In the latest SFHB, the type I waveform at the time of earthquake level 2 has been refreshed. All of the necessary waveform for the dynamic analysis are saved into the folder in which the product has been installed (C:\Program Files \FORUM 8\Engineers Studio 2.0.0\Samples\Waves\).
Figure 1 is the necessary input screen for l|ำ of reinforcement concrete section, where the values regarding the allowable strain of reinforcement are input. For the stress strain curve of concrete, the conventionally ultimate strain 0.8ะcc has been changed to 0.5ะcc. l|ำ characteristic (Figure 2) can be obtained from these conditions. This is the non-linear history model of bi-linear type specified by SFHB.
The necessary input screen for l|ำ of steel pier section is figure 3. This is in case of rectangular cross-section which is not concrete filled, where input regarding the allowable strain รa of steel pier. The non-linear history model is as shown in figure 4.
|Mesh partition of plate element|
|Mesh partition algorithm of plate element has been improved. Although conventionally
the automatic division in a triangle had been supported, the outline can
now be automatic divided in square element. The quality of automatic division
has also been improved.
|Damping element is now supported. The characteristic of this damping element
is a model in which the relationship of speed and force is shown in the
@F : damping resistance force(kN)
@V : speed(m/sec)
@C : damping coefficient(kN.sec/m)
@ฟ : velocity exponent (For example 0.3 etc. If it is set to 1.0, it is the linear viscous damper)
Damping element is placed between the node point of i edge and j edge like the spring element. The force is occurred according to the velocity difference of the 2 nodes occurred during the dynamic analysis, which is to say, relative velocity. This force is the damping force. Damping element has also the element coordinate system same as the spring element, however, the relationship of speed and force occurs in the uniaxial direction (xl) from the node point of i edge and j edge. If both nodes have the same coordinate, the different coordinate system needs to be obtained.
C and ฟ in the above expression are the value given by the maker who produces the damper.
When the damping force has occurred, the curve shown in the following figure can be seen.
|The other added functions|
|In addition, the functions have been added as follows.
|We will continue to improve the function in the future as well. Please look forward to it!|
|(Up&Coming '12@Fall Issue)|