本文關(guān)鍵詞：提高基于靜測參數(shù)橋梁性能評(píng)測結(jié)果客觀性的探討與研究　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 荷載試驗(yàn) 校驗(yàn)系數(shù) 評(píng)測 客觀性

【摘要】：目前,橋梁結(jié)構(gòu)現(xiàn)場檢測的方法主要包括靜動(dòng)力荷載試驗(yàn)、結(jié)構(gòu)現(xiàn)狀檢查、結(jié)構(gòu)缺陷和耐久性無損檢測等,其中橋梁荷載試驗(yàn)以其可靠性高、針對(duì)性強(qiáng)等特點(diǎn)被得到廣泛應(yīng)用,也是橋梁承載力評(píng)定較為有效和被行業(yè)廣泛認(rèn)可的方法。本文就提高基于靜測參數(shù)橋梁結(jié)構(gòu)性能評(píng)測結(jié)果的客觀性進(jìn)行了研究與探討,主要內(nèi)容包括:①討論了基于橋梁荷載試驗(yàn)結(jié)構(gòu)性能評(píng)價(jià)的背景、目的和意義及我國橋梁結(jié)構(gòu)性能評(píng)測的發(fā)展沿革,在此基礎(chǔ)上分析和探討了基于靜測參數(shù)橋梁結(jié)構(gòu)性能評(píng)測的現(xiàn)狀和存在的不足;②通過對(duì)結(jié)構(gòu)實(shí)測應(yīng)變受溫度影響的定量分析,給出了保證簡支梁橋?qū)崪y應(yīng)變可靠性的溫度允許波動(dòng)范圍的建議值;③針對(duì)荷載試驗(yàn)中撓度測試的主要測試方法,定量分析了標(biāo)尺傾斜、地球曲率、大氣折光等因素對(duì)撓度實(shí)測結(jié)果的影響程度,并提出合理建議;④通過對(duì)111個(gè)橋梁荷載試驗(yàn)實(shí)測樣本數(shù)據(jù)的分析研究,給出了四種常見橋型的撓度、應(yīng)力校驗(yàn)系數(shù)取值的常值范圍,同時(shí)就如何保證結(jié)構(gòu)性能評(píng)價(jià)客觀性、規(guī)范合理應(yīng)用、意外情況處置、實(shí)測校驗(yàn)系數(shù)統(tǒng)計(jì)規(guī)律、混凝土拱橋截面應(yīng)力校驗(yàn)系數(shù)取值離散性等進(jìn)行了深入的研究和探討,并提出合理化建議,具有較高的參考價(jià)值;⑤在分析實(shí)測相對(duì)殘余指標(biāo)易受難以避免測量誤差影響而導(dǎo)致失真和客觀性較差的原因的基礎(chǔ)上,就如何合理解讀和應(yīng)用相對(duì)殘余指標(biāo)客觀評(píng)價(jià)結(jié)構(gòu)性能展開分析,提出了基于不同實(shí)測結(jié)果量值采用不同相對(duì)殘余控制值的評(píng)價(jià)方法;⑥就基于靜測參數(shù)對(duì)評(píng)價(jià)結(jié)果客觀性的影響因素進(jìn)行了系統(tǒng)分析和研究,對(duì)鋪裝層厚度、橫向加載偏差、彈性模量取值等對(duì)校驗(yàn)系數(shù)的影響進(jìn)行了定量分析。
[Abstract]:At present, the methods of bridge structure field testing mainly include static and dynamic load test, structural status check, structural defect and durability nondestructive testing, among which the reliability of bridge load test is high. Characteristics such as strong pertinence have been widely used. It is also a more effective and widely accepted method of bridge bearing capacity evaluation. This paper studies and discusses how to improve the objectivity of bridge structure performance evaluation results based on static survey parameters. The main contents include: 1, the background, purpose and significance of the structural performance evaluation based on the bridge load test, and the development and evolution of the performance evaluation of the bridge structure in China are discussed. On this basis, the present situation and shortcomings of structural performance evaluation of bridges based on static survey parameters are analyzed and discussed. (2) through the quantitative analysis of the effect of the temperature on the measured strain of the structure, the suggested value of the allowable fluctuation range of the temperature to guarantee the reliability of the measured strain of the simply supported beam bridge is given. (3) in view of the main testing methods of deflection in load test, the influence degree of scale inclination, earth curvature and atmospheric refraction on the measured deflection results is quantitatively analyzed, and some reasonable suggestions are put forward. 4 through the analysis and study of the measured data of 111 bridge load test samples, this paper gives the constant range of deflection and stress check coefficient of four common bridge types, and how to ensure the objectivity of structural performance evaluation. The reasonable application of the specification, the disposal of the accident situation, the statistic law of the measured check coefficient and the discreteness of the stress check coefficient of the concrete arch bridge are studied and discussed in depth, and some reasonable suggestions are put forward. It has high reference value; (5) based on the analysis of the causes of distortion and poor objectivity caused by the relative residual indexes easily affected by the difficult to avoid the measurement errors. Based on the analysis of how to reasonably interpret and apply the relative residual index to objectively evaluate the structure performance, an evaluation method with different relative residual control values based on different measured results is put forward. 6. The factors influencing the objectivity of evaluation results based on static measurement parameters are systematically analyzed and studied, and the effects of pavement thickness, lateral loading deviation and elastic modulus on the calibration coefficient are quantitatively analyzed.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U446

【共引文獻(xiàn)】

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本文編號(hào)：1414298