本文選題：覆土波紋鋼板橋涵 + 試驗(yàn)研究��； 參考：《北京交通大學(xué)》2016年碩士論文

【摘要】：近年來(lái),我國(guó)公路交通建設(shè)發(fā)展勢(shì)頭迅猛,覆土波紋鋼板橋涵作為一種新型結(jié)構(gòu)形式,在我國(guó)公路工程建設(shè)中正得到越來(lái)越廣泛的重視。但是由于我國(guó)大批量的應(yīng)用時(shí)間比較短,對(duì)不同截面形式波紋鋼板橋涵受力性能的研究仍處于起步階段,尤其對(duì)該類型結(jié)構(gòu)應(yīng)用到不同地貌和地質(zhì)條件下的長(zhǎng)期受力性能的研究明顯滯后。因此,本文對(duì)不同線形結(jié)構(gòu)的受力特點(diǎn)及該類結(jié)構(gòu)長(zhǎng)期受力性能進(jìn)行現(xiàn)場(chǎng)試驗(yàn)研究及有限元數(shù)值分析,具有重要的理論研究意義和實(shí)際應(yīng)用價(jià)值。本文以4米直徑圓管和8.1米跨徑管拱波紋鋼板橋涵為依托,通過(guò)現(xiàn)場(chǎng)長(zhǎng)期監(jiān)測(cè)試驗(yàn)和有限元數(shù)值計(jì)算相結(jié)合的方法,研究了管拱形截面波紋鋼板橋涵和圓形截面波紋鋼板橋涵在填土施工完成后的長(zhǎng)期受力性能及其影響因素。通過(guò)對(duì)現(xiàn)場(chǎng)實(shí)測(cè)土壓力和應(yīng)力數(shù)據(jù)的研究分析,發(fā)現(xiàn)了溫度和基礎(chǔ)沉降對(duì)波紋鋼板橋涵長(zhǎng)期受力性能有著較大影響,特別是對(duì)結(jié)構(gòu)所受應(yīng)力影響顯著。因此,通過(guò)建立二維有限元模型,具體分析了溫度和基礎(chǔ)沉降對(duì)不同截面形式波紋鋼板橋涵應(yīng)力和土壓力的影響。研究和分析結(jié)果表明：在施工結(jié)束后長(zhǎng)期作用階段,管涵所受土壓力變化主要受土體沉降密實(shí)的影響,土體沉降密實(shí)總體有利于土體與結(jié)構(gòu)相互作用的發(fā)揮,而溫度則對(duì)光柵光纖傳感器長(zhǎng)期測(cè)試數(shù)據(jù)影響較大,去除溫度影響后各測(cè)點(diǎn)應(yīng)力有所增長(zhǎng),但增長(zhǎng)緩慢,且在一段時(shí)間以后,甚至有減小趨勢(shì),這與土壓力長(zhǎng)期變化趨勢(shì)相互印證,說(shuō)明波紋鋼板橋涵長(zhǎng)期受力性能將逐漸趨向?qū)Y(jié)構(gòu)有利方向發(fā)展；不同截面形式波紋鋼板橋涵受力特點(diǎn)也有所不同,管拱形截面橋涵水平土壓力相比豎向土壓力變化較大,且溫度對(duì)管中受力影響比管頂顯著,而圓形截面橋涵水平土壓力與豎向土壓力變化相差不大,溫度對(duì)管頂受力影響比管中顯著；波紋鋼板橋涵對(duì)于基礎(chǔ)沉降有較好的適應(yīng)性。
[Abstract]:In recent years, highway traffic construction in China is developing rapidly. As a new type of structure, corrugated steel bridges and culverts are being paid more and more attention in highway construction in China. However, due to the short application time in large quantities in China, the study on the mechanical properties of corrugated steel plate bridges and culverts with different cross-section forms is still in its infancy. Especially, the study on the long-term mechanical behavior of this type of structure applied to different geomorphological and geological conditions is obviously delayed. Therefore, the field test and finite element numerical analysis of the mechanical characteristics of different linear structures and their long-term mechanical properties have important theoretical significance and practical application value. Based on 4 meter diameter circular pipe and 8.1 meter span pipe arch corrugated steel plate bridge and culvert, this paper combines the field long-term monitoring test with finite element numerical calculation. The long-term mechanical behavior of corrugated steel plate bridge culvert with arched section and corrugated steel plate with circular section after the completion of fill construction and its influencing factors are studied. Through the study and analysis of the field measured soil pressure and stress data, it is found that temperature and foundation settlement have great influence on the long-term mechanical performance of corrugated steel plate bridge and culvert, especially on the stress of the structure. Therefore, the effects of temperature and foundation settlement on the stress and earth pressure of corrugated steel plate bridge and culvert with different cross sections are analyzed by establishing a two-dimensional finite element model. The results show that the variation of soil pressure in pipe culverts is mainly affected by the compaction of soil settlement, which is beneficial to the interaction between soil and structure. However, the temperature has a great influence on the long-term measurement data of the grating fiber sensor. After removing the influence of temperature, the stress of each measuring point increases, but the growth is slow, and after a period of time, there is even a tendency to decrease. It is confirmed by the long-term variation trend of earth pressure, which indicates that the long-term mechanical behavior of corrugated steel plate bridges and culverts will gradually develop in a favorable direction to the structure, and the stress characteristics of corrugated steel plate bridges and culverts in different cross-section forms are also different. Compared with the vertical earth pressure, the horizontal earth pressure of the bridge and culvert with the arch section of the pipe has a greater change than that of the vertical earth pressure, and the influence of temperature on the stress in the pipe is more significant than that on the top of the pipe. The influence of temperature on the stress on the top of the pipe is more obvious than that in the pipe, and the corrugated steel plate bridge and culvert have better adaptability to the settlement of the foundation.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U441

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