本文選題：地震反應(yīng)分析　切入點(diǎn)：子結(jié)構(gòu)方法　出處：《清華大學(xué)》2013年碩士論文

【摘要】：目前對(duì)結(jié)構(gòu)地震反應(yīng)的研究方法中，振動(dòng)臺(tái)試驗(yàn)受到振動(dòng)臺(tái)大小的限制，對(duì)大型復(fù)雜結(jié)構(gòu)試驗(yàn)?zāi)芰τ邢�；混合試�?yàn)方法，尤其是近些年通過子結(jié)構(gòu)技術(shù)實(shí)現(xiàn)了分布式的試驗(yàn)平臺(tái)，由于可以有效的利用位于不同地點(diǎn)的試驗(yàn)室設(shè)備資源，在國(guó)內(nèi)外得到了較好的發(fā)展，但是由于這些方法通常采用了靜力凝聚的方法并且子結(jié)構(gòu)邊界處自由度通常較少，難以有效的應(yīng)用于大型復(fù)雜結(jié)構(gòu)的數(shù)值模擬中。 進(jìn)行精確的地震反應(yīng)仿真分析是研究工程抗震的重要手段。大型復(fù)雜結(jié)構(gòu)的地震反應(yīng)分析計(jì)算量巨大，使得在個(gè)人計(jì)算機(jī)有限的內(nèi)存和計(jì)算能力下，利用常規(guī)的分析方法很難進(jìn)行。并且復(fù)雜結(jié)構(gòu)系統(tǒng)可能包括多個(gè)具備不同力學(xué)特征的子結(jié)構(gòu)，對(duì)不同的子結(jié)構(gòu)常常需要采用不同的有限元軟件進(jìn)行模擬。如果利用子結(jié)構(gòu)技術(shù)將復(fù)雜結(jié)構(gòu)系統(tǒng)劃分為多個(gè)子結(jié)構(gòu)，允許針對(duì)不同子結(jié)構(gòu)使用不同的有限元軟件進(jìn)行分析計(jì)算將非常有吸引力。因此整合現(xiàn)有的有限元分析軟件，利用各自的優(yōu)勢(shì)進(jìn)行結(jié)構(gòu)地震反應(yīng)模擬是一種有效的解決問題的方法。 本文提出的結(jié)構(gòu)地震反應(yīng)分析平臺(tái)將整體結(jié)構(gòu)劃分為多個(gè)子結(jié)構(gòu)進(jìn)行計(jì)算，計(jì)算中考慮子結(jié)構(gòu)間的相互作用。為了滿足不同類型的子結(jié)構(gòu)對(duì)不同分析軟件的需求，在此系統(tǒng)中每個(gè)子結(jié)構(gòu)都被視作高度獨(dú)立的系統(tǒng)，并為每個(gè)結(jié)構(gòu)分析軟件提供標(biāo)準(zhǔn)化的接口，用來傳輸各子結(jié)構(gòu)邊界處的力和位移。各子結(jié)構(gòu)邊界處采用“協(xié)調(diào)器”滿足力的平衡和位移協(xié)調(diào)，該方法的核心基于柯西-牛頓迭代過程，其實(shí)現(xiàn)參考了潘鵬等人針對(duì)分布式擬動(dòng)力實(shí)驗(yàn)系統(tǒng)提出的“協(xié)調(diào)器”算法。 研究中建立了應(yīng)用于商業(yè)有限元軟件ABAQUS和開源分析軟件OpenSees的子結(jié)構(gòu)系統(tǒng)，“協(xié)調(diào)器”與兩個(gè)子結(jié)構(gòu)計(jì)算系統(tǒng)構(gòu)成本文中的分析平臺(tái)。研究中建立了一個(gè)擁有四個(gè)塔樓的復(fù)雜結(jié)構(gòu)模型對(duì)該平臺(tái)做了相應(yīng)的驗(yàn)證，，通過整體模型數(shù)值試驗(yàn)與地震分析平臺(tái)的計(jì)算結(jié)果的對(duì)比分別討論了分析平臺(tái)對(duì)于線性問題和非線性問題的有效性。 最后利用該平臺(tái)進(jìn)行了土-結(jié)相互作用（SSI）分析，土壤使用OpenSees進(jìn)行建模，上部結(jié)構(gòu)使用Abaqus進(jìn)行建模，并通過本文的結(jié)構(gòu)分析平臺(tái)考慮土壤與結(jié)構(gòu)相互間的作用，結(jié)果表明該分析平臺(tái)對(duì)于具有非線性特征的多個(gè)子結(jié)構(gòu)系統(tǒng)的分析具有較強(qiáng)的能力。
[Abstract]:At present, the shaking table test is limited by the size of the shaking table, and its ability to test large and complex structures is limited.Especially in recent years, the distributed test platform has been realized by substructure technology. Because of the effective use of laboratory equipment resources located in different locations, it has been well developed at home and abroad.However, these methods are usually based on static coacervation and the degree of freedom at the boundary of substructures is usually less, so it is difficult to be effectively applied to the numerical simulation of large and complex structures.Accurate seismic response simulation analysis is an important method to study earthquake resistance of engineering.Seismic response analysis of large and complex structures has a huge amount of computation, which makes it difficult to use conventional analysis methods under the limited memory and computing power of personal computer.And the complex structure system may include many substructures with different mechanical characteristics. Different substructures often need to be simulated with different finite element software.If the substructure technique is used to divide the complex structure system into multiple substructures, it will be very attractive to use different finite element software for different substructures.Therefore, it is an effective method to solve the problem by integrating the existing finite element analysis software and making use of their respective advantages to simulate the seismic response of structures.The structural seismic response analysis platform proposed in this paper divides the whole structure into several substructures for calculation, in which the interaction between substructures is taken into account.Used to transmit forces and displacements at the boundaries of each substructure.The balance and displacement coordination of "coordinator" is adopted at the boundary of each substructure. The core of the method is based on Cauchy Newton iteration process. The implementation of the method refers to the "coordinator" algorithm proposed by Pan Peng and others for distributed pseudo-dynamic experimental system.In this paper, the substructure system of commercial finite element software ABAQUS and open source analysis software OpenSees is established. The "coordinator" and two substructure computing systems constitute the analysis platform in this paper.In the study, a complex structure model with four towers was built to verify the platform.The effectiveness of the analytical platform for linear and nonlinear problems is discussed by comparing the numerical results of the whole model and the seismic analysis platform.Finally, this platform is used to analyze soil-junction interaction, OpenSees is used to model soil, Abaqus is used to model superstructure, and the interaction between soil and structure is considered through the structural analysis platform in this paper.The results show that the platform has a strong capability for the analysis of multiple substructure systems with nonlinear characteristics.
【學(xué)位授予單位】：清華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU311.3

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