（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］《高层建筑混凝土结构技术规程》（JGJ 3—2010）第3-11-4条第2款规定：弹塑性分析时，复杂结构应进行施工模拟分析，并以施工全过程完成后的内力作为初始状态。根据该条规定，多数情况下施工模拟成为结构大震弹塑性分析的必要准备工作。为实现施工模拟后的内力与后续地震波作用下的弹塑性内力无缝对接，防止出现地震波作用初期出现结构不平衡所产生的不稳定现象，保证弹塑性分析最终结果的可靠性，提出了一种专用的非线性施工模拟算法，该算法直接采用非线性单元以及材料弹塑性本构关系进行计算，解决了传统线性施工模拟算法存在的问题，并进行了加速处理。

［关键词］非线性； 施工模拟； 弹塑性分析； 有限单元法

中图分类号：TU375文献标识码：A文章编号：1002-848X(2019)18-0126-05

A new nonlinear construction simulation algorithm for elastoplastic analysis

Wu Yunpeng, Han Bo, Guo Feng, Miao Qisong

（Beijing Institute of Architectural Design, Beijing 100045, China）

Abstract:Clause 3-11-4, Section 2 of Technical specification for concrete structures of tall building (JGJ 3—2010) stipulates that construction simulation analysis should be used for complex structures in the elastoplastic analysis, and the final internal force of construction simulation should be taken as the initial state of the elastoplastic analysis. Therefore, construction simulation is a necessary preparation for elastoplastic analysis of structures under rare earthquakes. In order to realize the seamless connection between the internal force after construction simulation and the elastoplastic internal force under the action of subsequent seismic waves, to prevent the instability caused by structural imbalance in the initial stage of seismic wave action and to ensure the reliability of the final result of elastoplastic analysis, a special nonlinear construction simulation algorithm was proposed, which directly uses nonlinear elements and material elastoplastic constitutive relations to do calculation, solves the problems existing in the traditional linear construction simulation algorithm, and accelerates the processing.

Keywords:nonlinear analysis; construction simulation; elastoplastic analysis; finite element method

作者简介：武云鹏，博士，正高级工程师，Email：wuyunpeng@biad.com.cn。