Steel02材料是单轴各向同性强化的Giuffre-Menegotto-Pinto钢材本构。Steel02是OpenSees中十分强大的一个单轴钢筋材料。通过设置其参数可以调整出多种意想不到的效果。作为初学者,我也要学习一下。
- 材料参数(Material Parameters)
Fy:屈服强度(yield strength);
E0:初始弹性模量(initial elastic tangent);
b:应变强化率,即屈服后斜率与初始弹性模量的比值(strain-hardening ratio, ratio between post-yield tangent and initial elastic tangent);
R0、cR1、cR2:控制从弹性段向塑性段过度的参数(parameters to control the transition from elastic to plastic branches, Recommended values: R0=between 10 and 20, cR1=0.925, cR2=0.15);
a1:等向强化参数(isotropic hardening parameter, increase of compression yield envelope as proportion of yield strength after a plastic strain of a2*Fy/E0);
a2:等向强化参数(isotropic hardening parameter);
a3:等向强化参数(isotropic hardening parameter, increase of tension yield envelope as proportion of yield strength after a plastic strain of a4*Fy/E0);
a4:等向强化参数(isotropic hardening parameter);
sigInit:初始应力值(initial stress value)。
从材料的参数可以发现,与Steel01基本类似,也具有Steel01的一些基本特性,同时可以分别考虑拉压方向的各向同性强化。
- 测试(Test)
(1)默认随动强化的滞回性能(Hysteretic Behavior of Model without Isotropic Hardening)
(2)受压向考虑强化滞回性能(Hysteretic Behavior of Model with Isotropic Hardening in Compression)
(3)受拉向考虑强化的滞回性能(Hysteretic Behavior of Model with Isotropic Hardening in Tension)
(4)同时考虑拉-压各向同性强化的滞回性能(Hysteretic Behavior of Model with Isotropic Hardening both in Tension and Compression)
- 参考(References)
[1] Steel02 Material
- 程序下载 ( Program Download )
[Tool][软件] OpenSees Material Test [OpenSees单轴材料测试工具]
( PS. 程序免费下载 ,欢迎大家给我提意见 ,敬请尊重劳动成果 )
- 相关话题 ( Related Topics)
[1] OpenSees Concrete06 Material Test
[2] OpenSees ConcreteD Material Test
[3] OpenSees Concrete04 Material Test
[4] OpenSees Concrete02 Material Test
[5] OpenSees Concrete01 Material Test
[6] OpenSees RambergOsgoodSteel Material Test
[7] OpenSees Steel02 Material Test
[8] OpenSees Steel01 Material Test
- 备注(Comments)
感谢 林乐斌 师弟 帮忙整理文档。
崔博士,若已知等效阻尼系数,该怎么确定steel02的各个参数值呢?等效阻尼比可以用滞回曲线的面积求得,但steel02模型只给出了骨架曲线,这该怎么求呢?希望得到崔博士的指点。谢谢
如果你有材料的滞回曲线,那直接导入软件拟合参数就可以了。
看了崔博士的博客,看到了挺多的实用工具,给科研新手的我一定的启发和帮助。
微信号:oushii
😉
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