本文選題：震損結(jié)構(gòu) + 基于性能　； 參考：《重慶大學(xué)》2014年博士論文

【摘要】：破壞性地震在我國(guó)時(shí)有發(fā)生，這些地震均造成大量房屋建筑的損傷與破壞；同時(shí)，早期建設(shè)的震損結(jié)構(gòu)也存在著過(guò)早劣化的現(xiàn)象，面臨著維修加固甚至提前退役的境遇，因此對(duì)地震受損鋼筋混凝土結(jié)構(gòu)進(jìn)行抗震性能評(píng)估有著重要的現(xiàn)實(shí)意義。本文以框架結(jié)構(gòu)為研究對(duì)象，從地震作用取值、損傷模型確定、抗震性能評(píng)估方法研究三個(gè)方面對(duì)震損結(jié)構(gòu)抗震性能評(píng)估展開(kāi)了深入的研究。論文的主要研究工作和成果如下： ①建立了均勻泊松分布地震發(fā)生概率模型和非齊次泊松分布地震發(fā)生概率模型，用于表征是否考慮場(chǎng)地歷史地震發(fā)生信息；基于地震發(fā)生概率模型，給出了不同地震風(fēng)險(xiǎn)中的結(jié)構(gòu)應(yīng)選用的抗震評(píng)估設(shè)防準(zhǔn)則�？紤]結(jié)構(gòu)不同使用壽命及結(jié)構(gòu)后續(xù)服役期內(nèi)場(chǎng)地地震具有不同超越概率的影響，推導(dǎo)出各抗震評(píng)估準(zhǔn)則下結(jié)構(gòu)評(píng)估烈度在剩余使用壽命內(nèi)的超越概率換算為設(shè)計(jì)基準(zhǔn)期為50年時(shí)的相當(dāng)超越概率的計(jì)算公式；推導(dǎo)出各評(píng)估準(zhǔn)則下水平地震影響系數(shù)最大值、地面峰值加速度與評(píng)估烈度之間的換算關(guān)系；給出了結(jié)構(gòu)在不同評(píng)估準(zhǔn)則、不同剩余使用壽命下的震損結(jié)構(gòu)抗震性能評(píng)估用地震地震作用取值調(diào)整系數(shù)。 ②選取了47個(gè)鋼筋混凝土壓彎構(gòu)件在低周往復(fù)加載損傷試驗(yàn)條件下獲得的滯回曲線(xiàn)數(shù)據(jù)結(jié)果，根據(jù)Park-Ang損傷指數(shù)計(jì)算公式，計(jì)算出損傷構(gòu)件不同損傷狀態(tài)點(diǎn)對(duì)應(yīng)的損傷指數(shù)值，，并通過(guò)數(shù)據(jù)回歸分析，得到了損傷構(gòu)件剛度退化系數(shù)和強(qiáng)度退化系數(shù)與構(gòu)件損傷指數(shù)值之間的擬合關(guān)系式，建立了考慮地震損傷的損傷構(gòu)件恢復(fù)力模型，并在此基礎(chǔ)上提出了考慮材料劣化的震損構(gòu)件恢復(fù)力模型；同時(shí)，在考慮材料劣化的損傷構(gòu)件恢復(fù)力骨架線(xiàn)時(shí)，針對(duì)混凝土和鋼筋材料劣化本構(gòu)關(guān)系與混凝土碳化深度有著密切關(guān)系的現(xiàn)狀，引入貝葉斯更新方法對(duì)已有混凝土碳化深度預(yù)測(cè)模型的預(yù)測(cè)結(jié)果進(jìn)行了重新估計(jì)，使得預(yù)測(cè)結(jié)果的準(zhǔn)確性和客觀性得到大幅提高。 ③在既有結(jié)構(gòu)基于性能的抗震評(píng)估方法研究中，靜力彈塑性分析方法是一種重要的分析方法，本文基于模態(tài)彈塑性理論，結(jié)合動(dòng)力時(shí)程分析方法和靜力彈塑性分析方法的優(yōu)點(diǎn)對(duì)傳統(tǒng)Pushover分析方法中結(jié)構(gòu)在地震作用下的頂點(diǎn)目標(biāo)位移的確定方法以及考慮高階振型影響的側(cè)向力加載模式進(jìn)行了改進(jìn)，并詳細(xì)給出了基于本文方法的建筑結(jié)構(gòu)抗震性能評(píng)估流程。將改進(jìn)方法應(yīng)用于五層和十層完好框架結(jié)構(gòu)以及十層地震受損鋼筋混凝土框架結(jié)構(gòu)的抗震性能評(píng)估中，計(jì)算結(jié)果表明：本文改進(jìn)Pushover法能夠有效模擬結(jié)構(gòu)在地震作用下的真實(shí)反應(yīng)，也能體現(xiàn)震損結(jié)構(gòu)在后續(xù)地震作用過(guò)程中的非線(xiàn)性行為。 ④考慮到地震易損性分析是結(jié)構(gòu)基于性能的抗震評(píng)估中一個(gè)必不可少的研究?jī)?nèi)容，且傳統(tǒng)三水準(zhǔn)地震作用并不能合理描述現(xiàn)行抗震設(shè)計(jì)規(guī)范中劃分的五個(gè)結(jié)構(gòu)性能目標(biāo)，特別是不能為輕微地震損傷結(jié)構(gòu)的抗震性能評(píng)估提供依據(jù)。為了完善了基于性能的既有鋼筋混凝土結(jié)構(gòu)抗震性能評(píng)估體系，作者針對(duì)既有結(jié)構(gòu)可能遭遇的地震風(fēng)險(xiǎn)水平特征，參考已有研究成果，在現(xiàn)有小震、中震和大震地震作用水平基礎(chǔ)上，新引入了一個(gè)50年地震超越概率為40%的地震作用水平，定義為“中小震”，并建立了既有鋼筋混凝土結(jié)構(gòu)在不同地震作用水平下的抗震性能水平目標(biāo)。 ⑤建立了地震受損鋼筋混凝土框架結(jié)構(gòu)抗震性能評(píng)估方法的理論體系和基本流程，并以一棟10層鋼筋混凝土框架結(jié)構(gòu)為例，詳細(xì)說(shuō)明了震損結(jié)構(gòu)抗震性能評(píng)估過(guò)程中損傷模型以及評(píng)估用地震作用取值的確定過(guò)程，并驗(yàn)算了結(jié)構(gòu)不同損傷位置對(duì)各抗震性能評(píng)估方法可靠性和適用性的影響。
[Abstract]:Destructive earthquakes occur in our country. These earthquakes all cause damage and damage to a large number of building buildings. At the same time, the earthquake damage structure in early construction also exists premature deterioration, facing the situation of maintenance and reinforcement and even early retirement. Therefore, it is important to evaluate the seismic performance of the reinforced concrete structure of the earthquake damaged reinforced concrete. In this paper, the frame structure as the research object, from the seismic action value, damage model determination, seismic performance evaluation method three aspects of seismic performance evaluation of earthquake damage structure in-depth study.
(1) the probability model of homogeneous Poisson distribution and the probability model of non homogeneous Poisson distribution are established to characterize the historical seismic information of the site. Based on the probability model of earthquake occurrence, the seismic evaluation criteria for the structure of different seismic risk are given. The different service life of the structure is considered. As well as the effect of different transcendental probability on the site earthquake in the subsequent service period of the structure, this paper deduces the calculation formula of the transcendental probability conversion of the structural evaluation intensity within the remaining service life under the criteria of the remaining service life under the criteria of the seismic evaluation, and derives the maximum influence coefficient of the horizontal earthquake under the evaluation criteria, and the maximum value of the influence coefficient of the horizontal earthquake is derived. The conversion relation between the ground peak acceleration and the evaluation intensity is given, and the seismic performance evaluation of the earthquake damage structure under the different evaluation criteria and the remaining service life is given by the seismic seismic action adjustment coefficient.
The results of the hysteresis curve data obtained by 47 reinforced concrete compression members under the condition of low cyclic loading damage test are selected. According to the calculation formula of Park-Ang damage index, the damage index value corresponding to the damage state points of the damaged component is calculated. The stiffness degradation coefficient and the strength of the damaged component are obtained by the data regression analysis. The regression equation between the degree degradation coefficient and the damage index value of the component is set up, and the restoring force model of the damaged component considering the damage of the earthquake is established. On this basis, the restoring force model of the earthquake damage component considering the deterioration of the material is proposed. At the same time, the deterioration of the strength skeleton line of the damaged component considering the deterioration of the material is considered for the deterioration of the concrete and the steel material. The relationship between the constitutive relationship and the depth of concrete carbonization is closely related. The Bayesian updating method is introduced to reestimate the prediction results of the prediction model of the existing concrete carbonization depth, which makes the accuracy and objectivity of the prediction results greatly improved.
The static elastoplastic analysis method is an important analysis method in the study of the seismic performance based seismic evaluation method. Based on the modal elastoplastic theory, combined with the advantages of the dynamic time history analysis and the static elastoplastic analysis method, the displacement of the vertex target in the traditional Pushover analysis method under the earthquake action is made. The determination method and the lateral force loading mode considering the influence of high mode shape are improved, and the seismic performance evaluation process of the building structure based on this method is given in detail. The improved method is applied to the five and ten layer intact frame structures and the seismic performance evaluation of the ten layer seismic damaged reinforced concrete frame structure. The results show that the improved Pushover method can effectively simulate the real response of the structure under the earthquake action, and can also reflect the nonlinear behavior of the earthquake damage structure during the subsequent earthquake action.
It is considered that seismic vulnerability analysis is an essential research content in the performance-based seismic evaluation, and the traditional three level seismic action can not reasonably describe the five structural and performance targets divided in the current seismic design code, especially for the seismic performance evaluation of the slight earthquake damage structure. The seismic performance evaluation system of existing reinforced concrete structures is perfected. In view of the characteristics of the possible earthquake risk level that the existing structures may encounter, and referring to the existing research results, on the basis of the existing small earthquakes, medium earthquakes and large earthquake earthquakes, a new seismic action level of 40% of the 50 year earthquake surpassing probability is introduced. The seismic performance of existing reinforced concrete structures under different earthquake levels is established.
The theoretical system and basic flow of seismic performance evaluation method for earthquake damaged reinforced concrete frame structure are established. A 10 story reinforced concrete frame structure is taken as an example. The damage model in the seismic performance evaluation process of the earthquake damage structure and the determination of the value of earthquake action are described in detail, and the structure of different damage is checked. The influence of location on the reliability and applicability of various seismic performance evaluation methods.

【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU375.4;TU352.11

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