| 基于OpenSees的混凝土结构连续倒塌分析中的从属节点建模技术 |
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| 引用本文： | 蒋碧聪,何政,朱胜.基于OpenSees的混凝土结构连续倒塌分析中的从属节点建模技术[J].地震学刊,2014(5):632-636. |
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| 作者姓名： | 蒋碧聪 何政 朱胜 |
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| 作者单位： | 大连理工大学土木工程学院,辽宁大连116024 |
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| 基金项目： | 国家自然科学基金项目（90915005,51161120359）; 教育部新世纪优秀人才项目（NCET-08-0096）资助 |
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| 摘 要： | 对重大工程结构进行强地震作用下的连续倒塌全过程分析并建立相应的设计与控制方法,已成为当前地震工程领域的发展趋势。目前,由于数值求解方面的困难,绝大多数针对极端作用下的结构连续倒塌的研究止步于数值临界状态的界定,在分析过程中不能实时地对结构构件的损伤状态进行监测并根据构件的损伤状态对分析模型进行修改。为了实现连续倒塌过程中构件的逐步失效,在OpenSees程序中,基于Beam with Hinges Element构建了端部带附属节点的Beam with Hinges Element,并根据构件失效情况对附属节点的多点约束进行控制。采用三次静力凝聚方法和Newmark-beta法,给出了对此改进建模技术可信的理论背景,方法的准确性通过一个简单框架算例得到了验证。
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| 关 键 词： | OpenSees 连续倒塌 建模技术 静力凝聚 动态内力重分布 |
OpenSees-based Master-Slave Modeling Technique in Progressive Collapse Analysis of Concrete Structures |
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| JIANG Bi-cong,HE Zheng,ZHU Sheng.OpenSees-based Master-Slave Modeling Technique in Progressive Collapse Analysis of Concrete Structures[J].Journal of Seismology,2014(5):632-636. |
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| Authors: | JIANG Bi-cong HE Zheng ZHU Sheng |
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| Institution: | (Department of Civil Engineering, Dalian University of Technology, Dalian 116024, China) |
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| Abstract: | It has been a tendency in the field of earthquake engineering to perform progressive collapse analysis of infrastructures under strong earthquake and to establish corresponding design and control methods. Currently,due to numerical challenges,most investigations associated with progressive collapse analysis of structures applied with abnormal load are terminated at numerically defined critical state of the structures. Therefore,real-time damage status of structural components cannot be monitored throughout analysis and numerical model cannot be modified according to damage status. For the purpose of reflecting gradual failure of structural components during progressive collapse,the element Beam with Hinges Element in OpenSees program was constructed with master-slave nodes at each end of components. Multiple constraints can be controlled with transient failure status of structural components. Application of the Triple Static Condensation method together with the Newmark-beta method presents credibly theoretical background for the proposed modeling technique,whose accuracy was verified by a simple reinforced concrete frame. |
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| Keywords: | OpenSees progressive collapse modeling technique static condensation dynamic redistribution of internal forces |
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