【摘要】：結(jié)構(gòu)遠(yuǎn)程協(xié)同擬動力試驗利用互聯(lián)網(wǎng)通訊手段將分布于異地的實驗室聯(lián)合起來形成一個功能強大的綜合性網(wǎng)絡(luò)結(jié)構(gòu)實驗室�？梢詫崿F(xiàn)所連接實驗室之間軟硬件設(shè)施的資源共享從而完成單個實驗室難以完成的大型綜合復(fù)雜試驗。因此為大跨度、大尺寸的橋梁結(jié)構(gòu)抗震性能研究提供了一種新的方法。大量研究表明,作為長跨結(jié)構(gòu)的橋梁在地震作用過程中考慮各支承處地震波的非一致性更加符合實際情況。本文基于前期研究工作,研究多點激勵下的擬動力試驗方法,并在此基礎(chǔ)上對遠(yuǎn)程協(xié)同擬動力試驗平臺進(jìn)行進(jìn)一步的開發(fā)。(1)介紹了橋梁結(jié)構(gòu)多點激勵問題研究的必要性及其意義,詳細(xì)闡述了多點激勵時程分析的基本方法；針對遠(yuǎn)程協(xié)同試驗方面,介紹了網(wǎng)絡(luò)化結(jié)構(gòu)實驗室NetSLab系統(tǒng),包括該系統(tǒng)的基本結(jié)構(gòu)、數(shù)據(jù)模型以及其程序的開發(fā)原理。(2)橋梁結(jié)構(gòu)彈塑性時程分析程序的開發(fā)。在考慮多點激勵以及對橋梁結(jié)構(gòu)計算模型研究的基礎(chǔ)上,編寫了橋梁結(jié)構(gòu)整體非線性時程分析程序；并以一個三跨梁式橋在多點激勵下的反應(yīng)分析為例,將自編程序與商業(yè)有限元軟件對比,驗證所編程序的正確性及可靠性,為遠(yuǎn)程協(xié)同擬動力試驗平臺的開發(fā)提供數(shù)值計算支持。同時,對比了一致激勵下與非一致激勵下結(jié)構(gòu)時程分析的部分結(jié)果,說明結(jié)構(gòu)地震反應(yīng)分析中應(yīng)根據(jù)實際情況對結(jié)構(gòu)多點激勵問題進(jìn)行考慮是有必要的。(3)橋梁結(jié)構(gòu)遠(yuǎn)程協(xié)同擬動力試驗平臺的開發(fā)。在傳統(tǒng)子結(jié)構(gòu)擬動力試驗方法研究的基礎(chǔ)上建立了基于多點激勵下橋梁結(jié)構(gòu)遠(yuǎn)程協(xié)同擬動力試驗的方法。并以一個三跨梁式橋在多點激勵作用下為算例,在分別取出橋墩及支座為試驗子結(jié)構(gòu)的基礎(chǔ)上,研究試驗子結(jié)構(gòu)及計算子結(jié)構(gòu)的剛度矩陣形成過程,同時討論了邊界條件的模擬問題。進(jìn)行了一系列遠(yuǎn)程虛擬試驗,并將其結(jié)果與結(jié)構(gòu)整體非線性時程分析對比,進(jìn)一步驗證試驗平臺的可靠性。(4)針對遠(yuǎn)程協(xié)同試驗的進(jìn)一步發(fā)展以及對遠(yuǎn)程協(xié)同試驗平臺的進(jìn)一步完善提出下一步研究工作。
[Abstract]:The remote cooperative dynamic test of structure combines the laboratories distributed in different places to form a powerful comprehensive network structure laboratory by means of Internet communication. The resource sharing of hardware and software facilities between the connected laboratories can be realized so as to complete the large-scale comprehensive and complex experiments that are difficult to complete by a single laboratory. Therefore, a new method is provided for the study of seismic performance of long-span and large-size bridge structures. A large number of studies show that it is more in line with the actual situation that the bridge as a long-span structure takes into account the inconsistency of seismic waves at each support in the process of seismic action. In this paper, based on the previous research work, the quasi-dynamic test method under multi-point excitation is studied. On this basis, the remote collaborative dynamic test platform is further developed. (1) the necessity and significance of studying the multi-point excitation problem of bridge structure are introduced, and the basic method of multi-point excitation time history analysis is expounded in detail. Aiming at the remote collaborative test, this paper introduces the NetSLab system of networked structure laboratory, including the basic structure of the system, the data model and the development principle of its program. (2) the development of elastic-plastic time history analysis program for bridge structure. On the basis of considering multi-point excitation and studying the calculation model of bridge structure, the whole nonlinear time history analysis program of bridge structure is compiled. Taking the response analysis of a three-span beam bridge under multi-point excitation as an example, the correctness and reliability of the program are verified by comparing the self-programmed program with the commercial finite element software. It provides numerical calculation support for the development of remote collaborative dynamic test platform. At the same time, some results of structural time history analysis under uniform excitation and non-uniform excitation are compared. It is necessary to consider the problem of multi-point excitation according to the actual situation in the seismic response analysis of structures. (3) the development of remote collaborative dynamic test platform for bridge structures. Based on the research of traditional substructure quasi-dynamic test method, a remote cooperative quasi-dynamic test method of bridge structure based on multi-point excitation is established. Taking a three-span beam bridge under multi-point excitation as an example, on the basis of taking the pier and support as the experimental substructure respectively, the formation process of the stiffness matrix of the experimental substructure and the calculated substructure is studied. At the same time, the simulation of boundary conditions is discussed. A series of remote virtual experiments are carried out, and the results are compared with the nonlinear time history analysis of the whole structure. The reliability of the test platform is further verified. (4) in view of the further development of remote collaborative test and the further improvement of remote collaborative test platform, the next research work is put forward.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U446

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