【摘要】：我國位于世界上兩大地震帶,即環(huán)太平洋地震帶和亞歐地震帶之間,是全球大陸區(qū)域中最活躍的地震區(qū)之一。與我國現(xiàn)行橋梁抗震設(shè)計(jì)規(guī)范對(duì)橋梁抗震性能的要求相比較,當(dāng)前我國大多數(shù)在役公路橋梁存在不同程度的抗震能力不足問題,導(dǎo)致我國目前公路網(wǎng)中橋梁的抗震能力較弱。而橋梁作為生命線工程,一旦發(fā)生災(zāi)害性的地震,直接和間接經(jīng)濟(jì)損失巨大,國內(nèi)外大量震害資料也表明了橋梁抗震加固研究的重要意義。在我國各級(jí)公路體系中,裝配式梁橋因其具有形式簡(jiǎn)單、受力明確、施工方便、工業(yè)化標(biāo)準(zhǔn)高等優(yōu)點(diǎn),在中小跨徑橋梁中得以廣泛運(yùn)用。本論文以公路裝配式梁橋?yàn)檠芯繉?duì)象,開展了裝配式梁橋的抗震性能評(píng)估與加固的研究,綜合起來,本文主要完成了以下工作:(1)在查閱國內(nèi)外大量文獻(xiàn)的基礎(chǔ)上,對(duì)國內(nèi)外橋梁抗震性能的評(píng)估的研究成果和抗震加固技術(shù)進(jìn)行了較為全面的綜述。(2)介紹了橋梁結(jié)構(gòu)抗震性能的評(píng)估方法和地震響應(yīng)分析方法的基本原理,并且介紹了橋梁抗震加固設(shè)計(jì)方法。(3)介紹了鋼筋混凝土的本構(gòu)關(guān)系、截面的彎矩-曲率曲線及滯回曲線的計(jì)算模型。同時(shí)總結(jié)了結(jié)構(gòu)的破壞準(zhǔn)則及目前各國的抗震性能目標(biāo),根據(jù)破壞準(zhǔn)則提出了結(jié)構(gòu)的性能目標(biāo),給出了合理的關(guān)于結(jié)構(gòu)損傷狀態(tài)的量化描述。(4)結(jié)合工程實(shí)例,給出了基于外觀的震前常規(guī)檢測(cè)評(píng)估,利用有限元軟件建立了模型,采用能力需求比法對(duì)該橋進(jìn)行了基于反應(yīng)譜法和基于時(shí)程分析法的震前抗震性能評(píng)估。(5)根據(jù)實(shí)際工程震后墩柱的震害狀況,確定了加固方案。分別采川減、隔震技術(shù)和外包混凝土法對(duì)橋梁進(jìn)行抗震加固,對(duì)加固后的橋梁進(jìn)行時(shí)程分析,最后進(jìn)行了震前與震后加固效果的對(duì)比研究。
[Abstract]:China is located between the two major seismic zones in the world, namely, the Pacific Rim seismic belt and the Eurasian seismic belt, which is one of the most active seismic zones in the global continental region. Compared with the requirements for seismic performance of bridges in the current code of seismic design of bridges in our country, most existing highway bridges in our country have insufficient seismic capacity to varying degrees, which leads to the weak seismic capacity of bridges in our country's highway network at present. As a lifeline project, once a disastrous earthquake occurs, the direct and indirect economic losses are huge. A large number of earthquake damage data at home and abroad also show the importance of the bridge seismic reinforcement research. In all levels of highway system in our country, prefabricated beam bridges are widely used in medium and small span bridges because of their advantages such as simple form, clear force, convenient construction and high industrialization standard. This paper takes the highway assembled beam bridge as the research object, and carries out the research on the seismic performance evaluation and reinforcement of the assembled beam bridge. The main work of this paper is as follows: (1) on the basis of consulting a large number of literatures at home and abroad, The research results and seismic strengthening techniques of bridges at home and abroad are summarized. (2) the basic principles of seismic performance evaluation and seismic response analysis of bridge structures are introduced. The design method of seismic reinforcement of bridges is introduced. (3) the constitutive relation of reinforced concrete, the calculation model of moment curvature curve and hysteretic curve of section are introduced. At the same time, the failure criteria of structures and the seismic performance targets of various countries are summarized. According to the failure criteria, the performance targets of structures are proposed, and a reasonable quantitative description of the damage state of structures is given. (4) combined with engineering examples, The routine detection and evaluation before earthquake based on appearance are given, and the model is established by using finite element software. Based on the response spectrum method and time history analysis method, the seismic performance of the bridge is evaluated by the method of capacity requirement ratio. (5) according to the earthquake damage condition of the pier column after the earthquake, the reinforcement scheme is determined. The seismic reinforcement of bridges is carried out by using Sichuan subtraction, isolation technology and concrete outlay method, and the time history analysis of the strengthened bridges is carried out. Finally, a comparative study on the effect of pre-earthquake and post-earthquake reinforcement is carried out.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U442.55;U445.72

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本文編號(hào)：2293890