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When creating roads with UC-win/Road, if you want to extend a road which plane, longitudinal and traverse setting
has been completed, although you can just extend it toward its end point,
you can't extend it toward its starting point in the same way. Because,
moving the directional change point, which is the starting point, moves
all position of longitudinal section, sectional change point, motion control
point and etc. which is set by the distance from the starting point. If
it's difficult to modify a lot of these, add alignment on the starting
point side. In the case of one-way traffic, just connect entry ramp to
the starting point, but two-way traffic can't be connected each other,
so connect as blow. How to add a alignment (Two way traffic) 1. Create additional line more than 2m away from exist alignment. 2. Connect them by rump alignment. Note that an alignment less than 2m can't be created. 3. Adjust plane, longitudinal section and cross section to avoid shear and bump. This method allows you to extend a road without moving the starting point.
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The specifications for highway bridges V aseismic design defines that the ultimate limit is when the strain at the position of compression reinforcement reaches the ultimate strain. By the result of fiber element of UC-win/FRAME(3D), it is determinable as ultimate displacement δu = 78.5mm. However, δ = 230mm that is determined as ultimate with M-θ and M-φ elements is almost three times the result of fiber element, and at this time, the strain level of concrete and reinforcement are as below. For example, the analysis result using M-θ and M-φ elements exceed the ultimate strain substantially, and furthermore, the state that the reinforcement yielded could be ultimate.
We analyzed the model, 45 degrees direction of square section, which is most affected by the biaxial bending this time, but in practice, it is important to consider when using M-θ and M-φ elements in case of biaxial bending occurs. UC-win/FRAME(3D) provides the 3 elements above, so it is relatively-easy to consider preliminary. Please make use of it. We are going to consider the case which axis power vibration occurs in the next issue. The property of the nonlinear element (1) The property of the nonlinear element (3) |
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(Up & Coming 2009 new year special issue) | |||||
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