强震作用下钢筋混凝土结构的数值模拟

Numerical Simulation of Reinforced Concrete Structures under Strong Earthquakes

强震作用下建筑结构的抗倒塌能力是基于性能抗震设计的核心目标,故对建筑结构在强震作用下的复杂非线性行为特别是倒塌破坏模式进行模拟和预测对于研究建筑物的安全性以及评估地震损失有重大意义。基于目前结构数值模拟的最新研究进展,利用大型通用有限元分析软件MSC.MARC平台,提出可用于钢筋混凝土框架剪力墙结构地震响应分析的弹塑性数值分析模型,并通过一个实际算例演示该分析模型在模拟RC框剪结构强震作用下倒塌过程。

Structural collapse safety under strong earthquakes is the most important objective of performance- based seismic design. So it is necessary to precisely simulate the complex nonlinear behaviors especially the potential collapse mode of the structure. Based on the new progress of study on structural numerical simulation, elasto-plastic numerical analytical model for reinforced concrete（RC） frame-shear-wall structures are proposed through the general-purpose finite element package of MSC.Marc that carries significant capacity of solving nonlinear problems. Dynamic time-history analysis for a 18-storey RC frame-shear-wall structure designed according to the current Chinese code for seismic design are carried out to illustrate the capacity of the pro- posed model. And the results show that the proposed model can simulate the collapse process of the structure under strong earthquake with an excellent nonlinear analysis capacity.