框架结构在冲击作用下的分析，往往由于其体量大且冲击作用面小等矛盾给数值模拟带来很大困难。框架结构的失效常常由某个关键构件破坏引起，而整体仍处于弹性状态，故在模拟中采用统一的非线性建模并非必要。为应对以上问题，文中采用数值子结构方法 (NSM) 对结构中进入非线性状态的构件进行隔离并精细化模拟，使得大体量结构的冲击问题转化为主结构线弹性分析和子结构非线性分析的问题。基于 NSM，提出并实现了 OpenSees 与 LS-DYNA 的联合计算方法。利用该方法研究和分析 ECC 材料在抗冲击方面的作用，验证了 OpenSees 与 LS-DYNA 联合计算的可行性和 ECC 材料的优越性。

The analysis of frame structure under impact often brings great difficulties to numerical simulation due to the contradiction between large volume and small impact surface． The failure of frame structure is often caused by the break down of a key component，while the whole structure is still in an elastic state． So it's unnecessary to a-dopt a unified non-linear model in the simulation． In order to deal with this problem，the Numerical Substructure Method (NSM) was adopted to isolate and precisely simulate the components which are in non-linear state． Thus the impact problem of large volume frame structure was transformed into the problem of linear elastic analysis of the main structure and nonlinear analysis of the substructure． Based on NSM，a joint calculation method of OpenSees and LS-DYNA was put forward and implemented． And the method was used to study and analyze the role of ECC material in impact simulation，and to verify the feasibility of the joint calculation method and the superiority of ECC material．