[OpenSees][科研] Pinching4 MatTest: Pinching4 Material Parameter Test [Pinching4材料参数测试工具]

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  • 程序图标 ( Icon )

  • 程序介绍 ( Introduction)

应网友要求,编制这个 Pinching4 MatTest 程序,用于测试 OpenSees中的Pinching4 材料的特性。

OpenSees中的Pinching4 Material 是一个灵活度非常高的单轴滞回本构模型,该材料拟合“挤压”载荷变形响应,并在循环载荷下表现出退化。强度和刚度的循环退化有三种方式:卸载刚度退化、重新加载刚度退化和强度退化。此外,该本构允许拟合材料的正负非对称特性。该本构的详细介绍可查看这个官方链接:https://opensees.berkeley.edu/wiki/index.php/Pinching4_Material

我们把官网该材料的命令贴到下面:

This command is used to construct a uniaxial material that represents a ‘pinched’ load-deformation response and exhibits degradation under cyclic loading. Cyclic degradation of strength and stiffness occurs in three ways: unloading stiffness degradation, reloading stiffness degradation, strength degradation.

uniaxialMaterial Pinching4 $matTag $ePf1 $ePd1 $ePf2 $ePd2 $ePf3 $ePd3 $ePf4 $ePd4 <$eNf1 $eNd1 $eNf2 $eNd2 $eNf3 $eNd3 $eNf4 $eNd4> $rDispP $rForceP $uForceP <$rDispN $rForceN $uForceN > $gK1 $gK2 $gK3 $gK4 $gKLim $gD1 $gD2 $gD3 $gD4 $gDLim $gF1 $gF2 $gF3 $gF4 $gFLim $gE $dmgType

$matTag integer tag identifying material
$ePf1 $ePf2 $ePf3 $ePf4 floating point values defining force points on the positive response envelope
$ePd1 $ePd2 $ePd3 $ePd4 floating point values defining deformation points on the positive response envelope
$eNf1 $eNf2 $eNf3 $eNf4 floating point values defining force points on the negative response envelope
$eNd1 $eNd2 $eNd3 $eNd4 floating point values defining deformation points on the negative response envelope
$rDispP floating point value defining the ratio of the deformation at which reloading occurs to the maximum historic deformation demand
$fFoceP floating point value defining the ratio of the force at which reloading begins to force corresponding to the maximum historic deformation demand
$uForceP floating point value defining the ratio of strength developed upon unloading from negative load to the maximum strength developed under monotonic loading
$rDispN floating point value defining the ratio of the deformation at which reloading occurs to the minimum historic deformation demand
$fFoceN floating point value defining the ratio of the force at which reloading begins to force corresponding to the minimum historic deformation demand
$uForceN floating point value defining the ratio of strength developed upon unloading from negative load to the minimum strength developed under monotonic loading
$gK1 $gK2 $gK3 $gK4 $gKLim floating point values controlling cyclic degradation model for unloading stiffness degradation
$gD1 $gD2 $gD3 $gD4 $gDLim floating point values controlling cyclic degradation model for reloading stiffness degradation
$gF1 $gF2 $gF3 $gF4 $gFLim floating point values controlling cyclic degradation model for strength degradation
$gE floating point value used to define maximum energy dissipation under cyclic loading. Total energy dissipation capacity is defined as this factor multiplied by the energy dissipated under monotonic loading.
$dmgType string to indicate type of damage (option: “cycle”, “energy”)

  • 程序截屏 ( screenshot)

我们可以采用该软件,复刻连接 https://opensees.berkeley.edu/wiki/index.php/Pinching4MaterialExample 里面的材料测试案例,如下图所示:

Video 视频演示

  • 如何获得软件 (  How to get this program )

如果您需要使用这个软件,请在这给网站捐助:http://www.jdcui.com/?page_id=4813,捐助不少于【250RMB】,捐助后在评论区留下您的评论,软件将通过网站客服号QQ(3014479529)给您发送,敬请尊重劳动成果 !!捐助者可以通过客服号进行相关研究问题及软件使用问题讨论。)


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10 thoughts on “[OpenSees][科研] Pinching4 MatTest: Pinching4 Material Parameter Test [Pinching4材料参数测试工具]

  1. XG Reply

    你好,已捐助,麻烦发一下软件,谢谢!

  2. 王学生 Reply

    您好 这个软件是直接导入滞回曲线出结果吗

    • CJD Post authorReply

      没有,导入你的位移历程曲线,去测试本构参数是否合适。

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