论文部分内容阅读
为准确、高效地分析钢筋混凝土(RC)梁柱结构在强动载作用下的损伤破坏甚至倒塌,建立了能够描述大变形、大应变的空间纤维Timoshenko梁单元,并将其与考虑率相关效应的钢筋、混凝土材料模型相结合,通过用户显式单元子程序在ABAQUS中实现。基于所建立的应变速率型3D纤维梁显式单元,借助ABAQUS的前后处理及求解功能,对爆炸荷载作用下的RC梁柱构件的动态响应和破坏模式及RC框架结构的连续性倒塌进行分析。结果表明:建立的应变速率型3D纤维梁柱单元能够合理描述RC构件的变形特性及钢筋、混凝土的应变速率效应;可以模拟爆炸作用下RC构件的弯曲、弯剪及直剪破坏模式,以及RC框架的连续倒塌过程;将纤维梁柱单元与率相关模型相结合于ABAQUS软件提供了一种强动载作用下高效、精确的RC结构非线性分析方法。
In order to accurately and efficiently analyze the damage, collapse and collapse of reinforced concrete (RC) beam-column structures under strong dynamic loading, a space-based Timoshenko beam element capable of describing large deformation and large strain was established and correlated with the consideration rate The combination of reinforced and concrete material models is implemented in ABAQUS via user explicit unit subroutines. Based on the established explicit element of strain rate 3D fiber beam, the dynamic response and failure mode of RC beam and column members and the collapse of RC frame under explosive load were analyzed by means of ABAQUS preprocessing and solving functions. The results show that the strain rate 3D fiber beam-column element can describe the deformation characteristics of RC members and the strain rate effects of RC members reasonably. The bending, bending and direct shear failure modes of RC members can be modeled as well as RC The continuous collapse of the frame; the combination of the fiber beam-column element and the rate-dependent model in the ABAQUS software provides an efficient and accurate non-linear analysis method for RC structures under strong dynamic loading.