黄羽立, 陆新征, 叶列平, 施 炜. 基于多点位移控制的推覆分析算法[J]. 工程力学, 2011, 28(2): 18-023.
引用本文: 黄羽立, 陆新征, 叶列平, 施 炜. 基于多点位移控制的推覆分析算法[J]. 工程力学, 2011, 28(2): 18-023.
HUANG Yu-li, LU Xin-zheng, YE Lie-ping, SHI Wei. A PUSHOVER ANALYSIS ALGORITHM BASED ON MULTIPLE POINT CONSTRAINTS[J]. Engineering Mechanics, 2011, 28(2): 18-023.
Citation: HUANG Yu-li, LU Xin-zheng, YE Lie-ping, SHI Wei. A PUSHOVER ANALYSIS ALGORITHM BASED ON MULTIPLE POINT CONSTRAINTS[J]. Engineering Mechanics, 2011, 28(2): 18-023.

基于多点位移控制的推覆分析算法

A PUSHOVER ANALYSIS ALGORITHM BASED ON MULTIPLE POINT CONSTRAINTS

  • 摘要: 该文提出了静力推覆分析的一种新的数值方法,通过引入位移刚性约束来保持恒定推覆侧力分布,实现基于位移控制的推覆分析。首先基于虚功原理对引入位移刚性约束实现保持恒定推覆侧力分布进行了论证,在理论上证明了该方法既适用于弹性结构,也适用于弹塑性结构。随后,以通用有限元程序MSC.MARC为例,介绍了如何实现基于多点位移控制的推覆分析。最后,通过算例对比,说明该文建议方法在计算结构复杂非线性特别是软化过程中的突出优势,即能够获取结构从弹性阶段到完全失去水平承载力的全过程,为全面认识结构的静力推覆性能,特别是为结构的倒塌分析,提供了有力工具。

     

    Abstract: This paper proposes a new numerical method for pushover analysis. By using multiple point constraints, the lateral force distribution is maintained and displacement-controlled pushover analysis is achieved. The method is derived from the principle of virtual work and the rigidity of multiple point constraint. It is applicable to both elastic and inelastic structures. The proposed pushover analysis method can be implemented with user-defined subroutine interfaces of finite element software MSC.MARC. The outstanding performance of the method is then demonstrated using monotonic and cyclic pushover analysis of reinforced concrete structures. The evolution of deterioration from onset to eventual member and structural failure can be tracked, suggesting that the proposed method is a powerful tool offering complete pictures and considerable insight into pushover performance and collapse mechanism of structures.

     

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