發(fā)布時(shí)間：2018-04-08 17:45

  本文選題：砌體結(jié)構(gòu)　切入點(diǎn)：損傷本構(gòu)關(guān)系模型　出處：《鄭州大學(xué)》2014年博士論文

【摘要】：砌體結(jié)構(gòu)房屋作為一種整體性差、剛度大、抗震性能差且應(yīng)用廣泛的結(jié)構(gòu)形式，抗震設(shè)計(jì)理論的更新與發(fā)展更顯迫切。為順應(yīng)性能化抗震設(shè)計(jì)理論的發(fā)展，需要加強(qiáng)砌體結(jié)構(gòu)性能化抗震設(shè)計(jì)方法的研究。 在此背景下，本文開展了砌體結(jié)構(gòu)房屋性能化抗震設(shè)計(jì)研究。本文工作是以砌體結(jié)構(gòu)房屋震害總結(jié)為出發(fā)點(diǎn)，以砌體結(jié)構(gòu)損傷本構(gòu)模型研究為主線，以砌體結(jié)構(gòu)房屋性能化抗震設(shè)計(jì)和性態(tài)水準(zhǔn)的定量劃分為重點(diǎn)開展的。本文的主要工作如下： 1砌體結(jié)構(gòu)震害總結(jié)與抗震設(shè)計(jì)方法的發(fā)展 根據(jù)大量震害資料，總結(jié)了砌體結(jié)構(gòu)房屋震害中的共性問(wèn)題。對(duì)抗震設(shè)計(jì)理論的發(fā)展和性能化設(shè)計(jì)的應(yīng)用現(xiàn)狀進(jìn)行了總結(jié)，將性能化抗震設(shè)計(jì)思想引入砌體結(jié)構(gòu)房屋抗震設(shè)計(jì)之中。 2基于損傷的砌體結(jié)構(gòu)本構(gòu)關(guān)系模型研究 基于細(xì)觀損傷理論和數(shù)理統(tǒng)計(jì)方法，在應(yīng)變空間中建立了砌體結(jié)構(gòu)損傷本構(gòu)模型。分析了損傷變量的演化規(guī)律，提出有效損傷發(fā)展階段的概念。將損傷發(fā)展和本構(gòu)研究結(jié)合起來(lái)，，用細(xì)觀損傷演化解釋了砌體宏觀力學(xué)行為的變化。該本構(gòu)模型具有下降段和反彎點(diǎn)。通過(guò)試驗(yàn)數(shù)據(jù)驗(yàn)證，證明了模型的合理性。 3砌體結(jié)構(gòu)抗震性態(tài)水準(zhǔn)的定量劃分 根據(jù)大量的試驗(yàn)資料和研究成果，對(duì)砌體結(jié)構(gòu)房屋在地震作用下的抗震性態(tài)水準(zhǔn)進(jìn)行了劃分，包括充分運(yùn)行、運(yùn)行、基本運(yùn)行和生命安全四個(gè)水準(zhǔn)。 用反應(yīng)結(jié)構(gòu)在地震作用下剛度退化和損傷發(fā)展的結(jié)構(gòu)整體損傷參數(shù)對(duì)性態(tài)水準(zhǔn)進(jìn)行了定量劃分，為砌體結(jié)構(gòu)性能化抗震設(shè)計(jì)的實(shí)際應(yīng)用創(chuàng)造了條件。 4反映結(jié)構(gòu)剛度退化的損傷指標(biāo)及損傷譜的建立 提出了反映結(jié)構(gòu)剛度退化的損傷指標(biāo)，該損傷指標(biāo)通過(guò)結(jié)構(gòu)在地震作用前后剛度比確定。提出了損傷譜的概念，即延性需求、能力曲線屈服后剛度比和損傷指標(biāo)的函數(shù)關(guān)系。將損傷指標(biāo)與非線性彈塑性反應(yīng)分析指標(biāo)結(jié)合了起來(lái)，使單自由度體系基于損傷的等效線性化非線性分析得以實(shí)現(xiàn)。損傷譜的建立為性態(tài)譜建立提供了理論基礎(chǔ)。 5基于損傷的砌體結(jié)構(gòu)性能化設(shè)計(jì)研究 基于損傷指標(biāo)和損傷譜，建立了單自由度體系非線性反應(yīng)的性態(tài)譜。性態(tài)譜由損傷指標(biāo)、單自由度體系自振周期和彈塑性位移增大系數(shù)構(gòu)成，能夠綜合反映單自由度體系在地震作用下的彈塑性位移增大程度和剛度退化程度，有效地將單自由度體系地震反應(yīng)分析和結(jié)構(gòu)位移、剛度變化結(jié)合起來(lái)�；谛詰B(tài)譜，提出了基于損傷的砌體結(jié)構(gòu)性能化設(shè)計(jì)方法,該方法的基本體系是砌體結(jié)構(gòu)層間剪切模型的等效單自由度體系，通過(guò)對(duì)該體系振動(dòng)特性（周期和阻尼）的分析，得到位移反應(yīng)和損傷指數(shù)，結(jié)合設(shè)定的性能目標(biāo)，能夠?qū)Y(jié)構(gòu)進(jìn)行抗震性能化設(shè)計(jì)。 提出了性態(tài)譜建立的流程框圖和基于性態(tài)譜的性能化設(shè)計(jì)流程框圖，并給出了砌體結(jié)構(gòu)抗震性能化設(shè)計(jì)的工程實(shí)例。
[Abstract]:As a kind of structural form with poor integrity, high stiffness, poor seismic performance and wide application, the renewal and development of seismic design theory is more urgent.In order to adapt to the development of performance-based seismic design theory, it is necessary to strengthen the research of performance-based seismic design method for masonry structures.In this context, the performance-based seismic design of masonry buildings is studied in this paper.The work of this paper is based on the summary of earthquake damage of masonry structures, the study of damage constitutive model of masonry structures, and the emphasis on performance-based seismic design of masonry structures and quantitative division of performance level.The main work of this paper is as follows:Summary of earthquake damage of masonry structure and development of seismic design methodBased on a large number of earthquake damage data, the common problems in earthquake damage of masonry structure buildings are summarized.The development of seismic design theory and the application status of performance-based design are summarized, and the idea of performance-based seismic design is introduced into the seismic design of masonry buildings.Research on constitutive relation model of masonry structure based on damageBased on the mesoscopic damage theory and mathematical statistical method, the damage constitutive model of masonry structure is established in strain space.The evolution law of damage variable is analyzed, and the concept of effective damage development stage is put forward.By combining damage development with constitutive research, the macroscopic mechanical behavior of masonry is explained by mesoscopic damage evolution.The constitutive model has descending section and reverse bending point.The rationality of the model is proved by the test data.Quantitative division of seismic behavior level of masonry structureAccording to a large number of experimental data and research results, the seismic behavior level of masonry structure building under earthquake action is divided into four levels: full operation, operation, basic operation and life safety.In this paper, the overall damage parameters of response structure subjected to seismic action are quantitatively divided, which creates conditions for the practical application of performance-based seismic design of masonry structures.4. Damage index and establishment of damage spectrum reflecting structural stiffness degradationA damage index reflecting the structural stiffness degradation is proposed. The damage index is determined by the stiffness ratio of the structure before and after the earthquake.The concept of damage spectrum is put forward, that is, the function of ductility requirement, stiffness ratio after yield of capability curve and damage index.The damage index is combined with the nonlinear elastic-plastic response analysis index, and the equivalent linearization nonlinear analysis based on damage can be realized for the single-degree-of-freedom system.The establishment of the damage spectrum provides a theoretical basis for the establishment of the property spectrum.Research on performance-based design of masonry structure based on damageBased on damage index and damage spectrum, the nonlinear response spectrum of single degree of freedom system is established.The property spectrum is composed of damage index, natural vibration period of single degree of freedom system and increasing coefficient of elastic-plastic displacement, which can reflect the increasing degree of elastic-plastic displacement and the degree of stiffness degradation of single-degree-of-freedom system under earthquake action.The seismic response analysis of single degree of freedom system is effectively combined with the structural displacement and stiffness changes.Based on the property spectrum, a performance-based design method for masonry structures based on damage is proposed. The basic system of this method is the equivalent single-degree-of-freedom system of the interstory shear model of masonry structures. The vibration characteristics (period and damping) of the system are analyzed.Displacement response and damage index, combined with the performance target, can be used for seismic performance design of structures.In this paper, the flow chart of the establishment of the property spectrum and the flow chart of performance-based design based on the property spectrum are presented, and an engineering example of seismic performance design of masonry structure is given.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU364;TU352.11

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