低屈服点LYP160钢材本构关系研究

发布时间：2019-06-13 17:57

【摘要】：为了研究低屈服点钢材LYP160的本构行为并提出循环本构模型,进行了此种钢材的循环加载试验,研究其受力性能,包括单调受力性能、滞回性能、破坏模态及耗能能力等。利用Ramberg-Osgood模型,得到材料骨架曲线。采用Chaboche模型,确定了循环本构模型的关键参数,利用此模型预测低屈服点钢板剪力墙结构的滞回行为。结果表明:低屈服点钢材LYP160虽然初始屈服点低,但其抗震性能较好,延性约为普通钢材及高强度钢材的2.3~2.8倍;能量耗散系数在3.6左右,耗能能力明显高于普通钢材和高强度钢材,提高幅度约30%,LYP160钢材具有显著的单调及循环强化性能,具有较高的承载能力,其滞回特性包含了各向同性强化与随动强化两种特征,其中各向同性强化行为具有控制作用,这与普通钢材及高强度钢材有明显的区别。
[Abstract]:In order to study the constitutive behavior of low yield point steel LYP160 and propose a cyclic constitutive model, the cyclic loading test of this kind of steel was carried out, and its mechanical properties, including monotonic mechanical properties, hysteretic properties, failure modes and energy dissipation capacity, were studied. Using Ramberg-Osgood model, the skeleton curve of the material is obtained. The key parameters of the cyclic constitutive model are determined by using Chaboche model, and the hysteretic behavior of steel plate shear wall structure with low yield point is predicted by using this model. The results show that although the initial yield point of low yield point steel LYP160 is low, its seismic performance is good, and the ductility is about 2.3 times higher than that of ordinary steel and high strength steel. The energy dissipation coefficient is about 3.6, the energy consumption capacity is obviously higher than that of ordinary steel and high strength steel, and the energy consumption capacity is increased by about 30%. LyP160 steel has obvious monotonic and cyclic strengthening properties and has high bearing capacity. Its hysteretic characteristics include isotropic strengthening and follow-up strengthening, among which isotropic strengthening behavior is controlled, which is obviously different from that of ordinary steel and high strength steel.
【作者单位】：北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51408031) 北京市自然科学基金项目(8154052)
【分类号】：TU511.3

【相似文献】