[程序] OSMatTest: OpenSees Material Test [OpenSees单轴材料测试工具]

[App]OpenSees Material Test.A small program to test the uniaxial materials in OpenSees.OpenSees Material Test将OpenSees ( Open System for Earthquake Engineering Simulation )中常用的单轴本构关系(钢及混凝土本构)提取出来,通过自行设计的界面进行测试,为今后更加深入的研究奠定基础。

OpenSees Concrete06 Material Test

Concrete06是基于Thorenfeldt曲线建立的考虑混凝土抗拉强度、非线性受拉硬化及受压性能的单轴本构。 材料参数(Material Parameters) (Figure from : http://opensees.berkeley.edu/wiki/index.php/File:Concrete06C.png ) fc:混凝土28天抗压强度(concrete compressive strength at 28 days ); e0:混凝土峰值强度对应的应变,即fc对应的应变(concrete strain at maximum strength); n:受压应力—应变曲线的形状系数(compression shape factor); k:峰值压应力后的应力—应变曲线的形状系数(post-peak compression shape factor); alphal:定义受压残余塑性应变的参数(α1 parameter for compression …

OpenSees Concrete04 Material Test

Concrete04受压部分的包络线采用Popovics (1973) 提出的单调荷载下的应力—应变关系,并根据Karsan-Jirsa加卸载准则确定其加卸载刚度(线性);受拉部分的包络线由线性上升段和指数下降段组成,其加卸载与再加载刚度取其与原点的割线刚度。(Concrete is a uniaxial Popovics concrete material object with degraded linear unloading/reloading stiffness according to the work of Karsan-Jirsa and tensile strength with exponential decay.) 材料参数(Material Parameters) fc:混凝土28天抗压强度(concrete compressive …

OpenSees RambergOsgoodSteel Material Test

关于 RambergOsgoodSteel Material 材料的信息参考 RambergOsgoodSteel Material。这里也顺便测试一下。 材料参数(Material Parameters) Fy:屈服强度(yield strength); E0:初始弹性模量(initial elastic tangent); a:屈服时残余应变,通常取0.002("yield offset" and commonly used value for a is 0.002); n:控制从弹性段向塑性段过度的参数,同时,当增大n时材料的强化速率会降低,通常取大于等于5(parameter to control the transition from elastic to plastic …