In the new specifications for highway bridges, type I shape of waves of the level 2 earthquake motion was changed. All shapes of waves which is necessary for a dynamic analysis are included in the following.
"<Product Installation Folder>\samples\Waves\BridgeDesign"
Ｍ－φ of RC section
It enables you to input concering the allowable warp of reinforcing steel and to confirm the result in the input screen about specifications for highway bridges (Figure 1). Stress strain curve of concrete is changed from the ultimate strain 0.8σcc to 0.5σcc. From these conditions, you can get M-N interaction diagram and Ｍ－φ characteristics (Figure 2). The new specifications for highway bridges is specified to perform dynamic analysis in the nonlinear history model of bi-linear type.
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| Figure 1 Input to calculate allowable warp of RC (left) and stress
strain curve （Upper right：concrete, Lower right：RC ÿ |
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| Figure 2 M-N interaction diagram of RC section（Left） and Ｍ－φ characteristics（Right) | |
Ｍ－φ of steel pier section
Figure 3 shows the input screen related to the new specifications for highway bridges of when rectangular cross-section without concrete filling. Here, input an allowable strain εa of steel pier and confirm the result. It is possible to determine each parameter when εa is calculated is in a range of application. You can also get M-N interaction diagram and non linear history model for steel section (Figure 4).
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| Figure 3 Input to calculate an allowable strain in steel-made pier section and range of application |
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| Figure 4 M-N interaction diagram of when rectangular cross-section
without concrete filling (Left) and Ｍ－φ characteristics (Right). |
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