静力分析方法在消能减震结构分析中的应用

由于受制于计算机软件中的消能减震单元,目前尚无较适用的静力分析方法应用于消能减震结构在多遇地震和罕遇地震下的结构分析。有关含消能减震部件的结构分析,主要以动力时程分析和动力弹塑性时程分析方法为主,因此具有较大的难度和需要很长的分析时间。为了推进结构消能减震于工程项目上的应用,缩短分析上的繁杂程序,依据《建筑抗震设计规范》,配合美国FEMA 356规范,提出一套消能减震结构在多遇地震下的等值线性分析方法和在罕遇地震下的静力非线性推覆分析方法（pushover analysis）。此方法适用于位移型阻尼器和防屈曲支撑,不但可使消能减震结构的结构分析简化,并可避免计算机软件的限制,且在不含阻尼器元素的计算机软件上,依然可做消能减震结构在多遇地震和罕遇地震下的结构分析。并介绍了此分析方法在消能减震结构的结构分析中的应用,以证明其可行性。

Application of New Linear Analysis Method for Structures with Energy Dissipation Devices

Restricted by computer programs with or without damper elements in structural analysis of energy dissipation devices under frequent and rare earthquakes,there are no proper linear analysis methods to solve the problem for now.At present,analysis methods for structures with energy dissipation devices are mainly the dynamic history analysis and elastic-plastic dynamic history analysis. These two methods are difficult to use in analyzing the structures with energy dissipation devices and is more time-consuming.Referring to the standard FEMA 356 of USA,this paper puts forward a new ＂Equivalent Linear Analysis Method＂ for structures with energy dissipation devices based on the building code of China（GB 50011-2010）.This paper also presents a new substitute model of damper analysis,which can effectively simulate the behavior of dampers during strong earthquakes using the effective plastic hinge.These methods can not only simplify and shorten the complex procedures during analyzing the structures with energy dissipation devices but also avoid the restriction of computer programs.The proposed method enables the engineers to analyze the structural behavior on the programs without damper elements and consequently accelerates the application of energy dissipation technology.In addition,this paper shows the example using the new method for analysis of building with energy dissipation devices to prove its feasibility.