多层、高层建筑结构弹塑性动力、静力分析
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摘要
应我国高层、超高层建筑发展需要,我们对建筑结构弹塑性动力反应分析软件进行了探索研究,在“高层建筑结构空间有限元分析与设计软件SATWE”的基础上,开发了一套简单实用的建筑结构弹塑性动力、静力分析软件EPDA。目前的EPDA软件提供了两种弹塑性分析方法,一种是弹塑性动力时程分析法,其力学模型有三种:层模型、平面模型和空间模型;另一种是弹塑性静力分析方法,就是通常所说的静力推覆分析方法。EPDA软件是我国第一套商品化的弹塑性分析软件,可以按任意给定方向计算结构的弹塑性时程响应,适用于各种材料的高层及超高层建筑结构,包括钢筋混凝土结构、钢结构和钢与混凝土混合结构,同时,程序中还考虑了多塔、转换层等结构特性。EPDA软件具有如下特点:(1)前后处理功能强,自动读取SATWE和Sat2000的设计分析结果,对钢筋混凝土构件,给出自动选筋结果,用户可以交互修改成实配钢筋;(2)采用纤维束模型模拟梁、柱、支撑等一维构件,纤维束模型的适用性好,不受截面形式和材料限制;(3)引入的弹塑性墙元效率高,精度好,可以更真实地分析剪力墙的弹塑性性能;(4)提供了多种分析方法和力学模型,可根据工程实际需要,灵活选用。
Tall buildings today have many special features, for example, the types of the structural system are so many and varied, and the arrangement of the plan and elevation becomes more and more complicated. For analysis and design of these complex tall buildings in seismic region, rational consideration of the elastic and plastic performance of the building under the action of seismic load is very important,as it determines the precision, efficiency and reliability of the analysis results. This paper introduces the principle programing of the EPDA software.EPDA is specially developed for elastic and plastic dynamic analysis of tall buildings. It consists of 4 parts: simplified storey model, simplified 2 D frame model, 3 D model, and push over analysis model. It can be applied to analyze not only steel buildings but also concrete buildings. The key of EPDA is to provide a helpful tool for designer with as high precision and efficiency as possible. In order to solve the problems of rational modeling of shear walls and floor slabs, to make the analysis model of tall buildings as reasonable as possible, two kinds of special elements--elastic and plastic wall element and elastic slab element are introduced.EPDA has strong functions of pre and post processing. It is the first commercial software of elastic and plastic analysis for tall buildings. All the information needed in EPDA is created automatically based on the structural database, including geometric information, loading information and reinforcement of concrete elements, etc. The elastic and plastic wall element and elastic slab element can be further meshed automatically, too. All above features greatly simplify the operations of users.
Tall buildings today have many special features, for example, the types of the structural system are so many and varied, and the arrangement of the plan and elevation becomes more and more complicated. For analysis and design of these complex tall buildings in seismic region, rational consideration of the elastic and plastic performance of the building under the action of seismic load is very important,as it determines the precision, efficiency and reliability of the analysis results. This paper introduces the principle programing of the EPDA software.EPDA is specially developed for elastic and plastic dynamic analysis of tall buildings. It consists of 4 parts: simplified storey model, simplified 2 D frame model, 3 D model, and push over analysis model. It can be applied to analyze not only steel buildings but also concrete buildings. The key of EPDA is to provide a helpful tool for designer with as high precision and efficiency as possible. In order to solve the problems of rational modeling of shear walls and floor slabs, to make the analysis model of tall buildings as reasonable as possible, two kinds of special elements--elastic and plastic wall element and elastic slab element are introduced.EPDA has strong functions of pre and post processing. It is the first commercial software of elastic and plastic analysis for tall buildings. All the information needed in EPDA is created automatically based on the structural database, including geometric information, loading information and reinforcement of concrete elements, etc. The elastic and plastic wall element and elastic slab element can be further meshed automatically, too. All above features greatly simplify the operations of users.
引文
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[2]吕西林等著.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1997.
[3]周氐等著.现代钢筋混凝土基本理论[M].上海:上海交通大学出版社,1989.
[4]过镇海.钢筋混凝土原理[M].北京:清华大学出版社,1999.
[5]谢贻权等著.弹性和塑性力学中的有限元法[M].北京:机械工业出版社,1981.
[6]林家浩等.串联多自由度体系弹塑性地震反应分析[J].大连工学院学报,1979,(2):41-53.
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