【摘要】：橋梁伸縮裝置是橋梁結(jié)構(gòu)的重要組成部分，也是薄弱環(huán)節(jié)之一，它直接承受車輛荷載和環(huán)境等因素的反復(fù)作用，其性能好壞直接影響橋梁結(jié)構(gòu)的健康和行車效果。液體橡膠基混凝土（Liquid Rubber Based Concrete，LRBC）是一種潛在的橋梁伸縮裝置接縫材料，這種材料具有一定的優(yōu)越性。本文主要圍繞液體橡膠基混凝土材料的力學(xué)性能以及橋梁伸縮裝置的結(jié)構(gòu)形式展開研究，具體工作如下： （1）研究設(shè)計(jì)了適用于橋梁伸縮裝置的LRBC優(yōu)化配合比。通過準(zhǔn)靜態(tài)抗折與壓縮試驗(yàn)，得到了滿足橋梁伸縮裝置接縫材料力學(xué)性能要求的優(yōu)化配合比，在此基礎(chǔ)上對擇優(yōu)化配合比的LRBC進(jìn)行了不同溫度下準(zhǔn)靜態(tài)壓縮試驗(yàn)，分析了LRBC壓縮強(qiáng)度受溫度影響的規(guī)律。 （2）通過拉伸試驗(yàn)對不同溫度環(huán)境的液體橡膠（Liquid Rubber，LR）與混凝土界面粘結(jié)性能進(jìn)行了測試，得到了不同溫度下界面粘結(jié)應(yīng)力-應(yīng)變曲線，研究了界面粘結(jié)性能受溫度影響的規(guī)律； （3）研究了無縫式橋梁伸縮裝置的工作原理，，主要是依靠彈塑體的變形適應(yīng)橋梁所產(chǎn)生的位移，同時(shí)達(dá)到對車輪承載的目的；著重分析了伸縮裝置接縫材料安裝寬度和伸縮量之間的關(guān)系，并對橋梁伸縮裝置的結(jié)構(gòu)尺寸進(jìn)行了初步設(shè)計(jì)。通過對橋梁伸縮裝置的數(shù)值模擬，分析了LRBC用于不同結(jié)構(gòu)形式伸縮裝置的應(yīng)力分布，優(yōu)化了伸縮裝置結(jié)構(gòu)形式。數(shù)值計(jì)算結(jié)果表明，LRBC的力學(xué)性能和優(yōu)化的伸縮縫結(jié)構(gòu)形式能滿足工程要求。 （4）對伸縮裝置施工工藝進(jìn)行研究與說明，提出了改進(jìn)措施。
[Abstract]:Bridge telescopic device is an important part of bridge structure and one of the weak links. It directly bears the repeated action of vehicle load and environment, and its performance directly affects the health and driving effect of bridge structure. Liquid rubber based concrete (Liquid Rubber Based Concrete,LRBC) is a potential joint material for bridge expansion and expansion devices, which has some advantages. This paper mainly focuses on the mechanical properties of liquid rubber based concrete material and the structural form of bridge expansion device. The main work is as follows: (1) the LRBC optimum mix ratio suitable for bridge expansion and expansion device is studied and designed. Based on the quasi static bending and compression tests, the optimized mix ratio is obtained to meet the requirements of the mechanical properties of the joints of bridge telescopic devices. On this basis, quasi-static compression tests at different temperatures are carried out to select the optimal mix ratio of LRBC. The effect of temperature on the compressive strength of LRBC was analyzed. (2) the interfacial bond properties of liquid rubber (Liquid Rubber,LR) and concrete at different temperatures were tested by tensile test. The stress-strain curves of interfacial bonding at different temperatures are obtained, and the influence of temperature on interfacial bond properties is studied. (3) the working principle of seamless bridge expansion device is studied. It mainly depends on the deformation of elastic-plastic body to adapt to the displacement produced by the bridge, and at the same time to achieve the purpose of bearing the wheel, the relationship between the installation width and the expansion quantity of the joint material of the telescopic device is analyzed emphatically. At the same time, the structure size of the bridge telescopic device is preliminarily designed. Through the numerical simulation of the bridge telescopic device, the stress distribution of the telescopic device used in different structure forms by LRBC is analyzed, and the structure form of the telescopic device is optimized. The numerical results show that the mechanical properties of LRBC and the optimized expansion joint structure can meet the engineering requirements. (4) the construction technology of the telescopic device is studied and explained, and the improvement measures are put forward.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U443.31

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 郭銀濤;陳希為;林琳;;橋涵伸縮縫彈塑體的性能研究[J];山東理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年04期

2 翟衛(wèi)武;王榴斌;;橋梁梳齒型(SFP型)伸縮縫損壞原因分析及整修措施[J];上海鐵道科技;2010年02期

本文編號：2240719