本文選題：易損性分析 + 響應(yīng)面模型��； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：針對(duì)目前我國在城市橋梁網(wǎng)絡(luò)震害預(yù)測(cè)方面研究尚不充分,在城市橋梁生命線系統(tǒng)抗震救災(zāi)能力評(píng)估方面存在的局限性,本文旨在通過基于概率易損性的橋梁網(wǎng)絡(luò)地震響應(yīng)分析和易損性評(píng)估模型,實(shí)現(xiàn)橋梁?jiǎn)误w精細(xì)化評(píng)估與橋梁網(wǎng)絡(luò)整體快速評(píng)估相結(jié)合的災(zāi)害模擬評(píng)估系統(tǒng),為震后通行能力評(píng)價(jià)與應(yīng)急修復(fù)提供分析方法和策略支持。為研究橋梁?jiǎn)误w和橋梁網(wǎng)絡(luò)的地震易損性,本文從曲線橋梁參數(shù)化有限元建模入手,基于Plackett-Burman試驗(yàn)設(shè)計(jì)篩選得到影響橋梁結(jié)構(gòu)地震響應(yīng)的重要性參數(shù),利用中心復(fù)合設(shè)計(jì)理論和響應(yīng)面模型研究橋梁結(jié)構(gòu)的地震損傷指標(biāo),采用寬界限法和串并聯(lián)理論分別研究了單體橋梁和橋梁網(wǎng)絡(luò)的地震易損性分析方法。具體的研究?jī)?nèi)容如下:(1)基于Matlab和OpenSees軟件,編寫鋼筋混凝土曲線簡(jiǎn)支梁橋的參數(shù)化建模程序并進(jìn)行地震響應(yīng)分析,分析了墩柱構(gòu)件的彎矩曲率響應(yīng)和滯回特性,研究了地震動(dòng)攻角對(duì)鋼筋混凝土曲線簡(jiǎn)支梁橋的影響規(guī)律,并根據(jù)橋梁構(gòu)件特點(diǎn)確定橋梁地震損傷指標(biāo)和各破壞狀態(tài)的損傷指標(biāo)臨界值。(2)采用Plackett-Burman試驗(yàn)設(shè)計(jì)研究橋梁結(jié)構(gòu)尺寸、材料參數(shù)對(duì)橋梁結(jié)構(gòu)地震響應(yīng)的影響大小及規(guī)律,利用中心復(fù)合設(shè)計(jì)建立損傷指標(biāo)平均值和標(biāo)準(zhǔn)差的響應(yīng)面模型(即地震損傷預(yù)測(cè)函數(shù))并驗(yàn)證其正確性;基于響應(yīng)面法,研究參數(shù)變化對(duì)橋梁結(jié)構(gòu)基本特征周期的規(guī)律,研究建立橋梁支座和墩柱的易損性曲線,并對(duì)比分析各參數(shù)對(duì)地震易損性的影響規(guī)律。(3)基于寬界限法研究建立單體橋梁地震整體易損性曲線,以某縣主要交通網(wǎng)絡(luò)為例,根據(jù)該橋梁網(wǎng)絡(luò)的基本特征進(jìn)行分類,推導(dǎo)不同類型橋梁網(wǎng)絡(luò)的地震易損性計(jì)算公式,建立橋梁網(wǎng)絡(luò)的易損性曲線;進(jìn)一步建立單橋與橋梁網(wǎng)絡(luò)的震后通行能力曲線并劃分通行狀態(tài),建立概率易損性與抗震救災(zāi)決策之間的聯(lián)系。
[Abstract]:At present, the research on earthquake disaster prediction of urban bridge network in our country is not enough, and the limitation in the evaluation of earthquake relief ability of urban bridge lifeline system. Through the seismic response analysis and vulnerability assessment model of bridge network based on probabilistic vulnerability, this paper aims to realize the disaster simulation evaluation system which combines the detailed evaluation of bridge unit with the rapid assessment of bridge network as a whole. To provide analysis method and strategy support for post-earthquake capacity evaluation and emergency restoration. In order to study the seismic vulnerability of single bridge and bridge network, this paper starts with parametric finite element modeling of curved bridge, and selects the important parameters that affect the seismic response of bridge structure based on Plackett-Burman test design. The seismic damage index of bridge structure is studied by using the central composite design theory and response surface model. The seismic vulnerability analysis method of single bridge and bridge network is studied by using wide bound method and series-parallel theory respectively. The concrete research contents are as follows: (1) based on Matlab and OpenSees software, the parameterized modeling program of reinforced concrete curved simply supported beam bridge is compiled and the seismic response is analyzed, and the moment curvature response and hysteretic characteristics of the pier members are analyzed. The influence of the angle of attack of ground motion on the reinforced concrete curved simply supported beam bridge is studied. According to the characteristics of the bridge members, the earthquake damage index of the bridge and the critical value of the damage index of each failure state are determined.) Plackett-Burman test is used to design and study the structure size of the bridge. The influence of material parameters on the seismic response of bridge structure is studied. The response surface model of average value and standard deviation of damage index (i.e. earthquake damage prediction function) is established by using the central composite design, and its correctness is verified based on the response surface method. In this paper, the regularity of the basic characteristic period of bridge structure by parameter change is studied, and the vulnerability curve of bridge support and pier column is established. The seismic vulnerability curve of single bridge is established based on the wide bound method. Taking the main traffic network of a county as an example, the basic characteristics of the bridge network are classified. The formulas for calculating seismic vulnerability of different types of bridge networks are derived, and the vulnerability curves of bridge networks are established, and the post-earthquake capacity curves of single bridge and bridge networks are further established and the traffic states are divided. The relationship between probability vulnerability and earthquake relief decision is established.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U442.55

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本文編號(hào)：2039762