张宝生¹，崔  松²，卢文生²
(1中国核电工程有限公司郑州分公司，郑州450052; 2上海诚建建筑规划设计有限公司，上海200081)

[摘要] 本文在模态Pushover分析方法基础上，推导建立了模态静力非线性分析方法，对一栋12层框架结构进行了模态静力非线性分析，提出了目标位移求解的等效单自由度体系弹塑性时程分析迭代法，计算结果与相应时程分析结果进行了比较，表明两者吻合较好，验证了本文计算方法的有效性，为静力非线性分析方法的推广使用提供参考。
[关键词] 框架结构；纤维模型；模态静力非线性分析；目标位移

Study on the modal Pushover seismic analysis methods of frame structures
Zhang Baosheng¹, Ctu song², Lu Wensheng²
(1 China Nuclear Power Engineering Co., Ltd., Zhengzhou Branch, Zhengzhou 450052, China; 2 Co-Joint Design Group Shanghai, Shanghai 200081, China)

Abstract: In this paper, a Modal Pushover Analysis method(MPA) was derived, and the time-history elasto-plastic iteration method was put forward to solve the target displacement of equivalent SDOF system. A 12-story frame structure was studied by the nonlinear dynamic method and Modal Pushover Analysis method, respectively. The analysis results show that the calculating errors are notably reduced with the increase of the vibration modes. When the higher modes are considered, the improvement to the error of top displacement is not as obvious as that ofinter-story drift, which indicates that the higher modes have a larger effect on the inter-story drift than the total displacement of the structures.
Keywords: frame structure; fiber element model; Modal Pushover Analysis(MPA); target displacement