【摘要】 在爆炸、冲击等强动载作用下,钢筋混凝土结构可能发生弯曲、弯剪和直剪破坏.为了准确地预测和模拟钢筋混凝土梁在强动载作用下的动力响应和破坏形态,本文运用ABAQUS有限元计算软件结合混凝土脆性开裂模型对强动载作用下的钢筋混凝土试验梁的整体响应以及一系列破坏形态进行了数值模拟,并将模拟结果与试验进行了对比分析.研究结果表明,本文所采用的数值模拟方法能较好地预测和模拟强动载作用下钢筋混凝土构件的整体动力响应以及相应的直剪、弯曲和弯剪破坏等一系列破坏形态.更多还原

【Abstract】 Reinforced concrete structures under severe dynamic loads may induce flexure,flexure-shear and direct shear failure modes.Among the above three failure modes,the most severe one is usually referred to direct shear that may fail by shear at the supports,where the plane of failure is nearly vertical and parallel to the loading direction.This mode occurs suddenly and abruptly without phenomena,so it is difficult to be observe.In order to forcast and simulate the dynamic responses and failure modes of the severe dynamic loaded reinforced concrete structures,the cracking model for concrete in the finite element software ABAQUS was adopted to simulate the dynamic responses and failure modes of the reinforced concrete structures.The numerical results were compared with the test data.It is demonstrated that the analytical results forcasted by the FEM way presented in this paper have a good agreement with the experimental observations.更多还原