中空鋼夾層橋面板的設(shè)計開發(fā)與受力性能研究
發(fā)布時間：2019-01-03 10:38
【摘要】：鋼夾層板(Sandwich Plate System deck,簡稱SPS板)是近年來在船舶工程、土木工程等領(lǐng)域取得較廣泛應(yīng)用的新型組合結(jié)構(gòu),在橋梁工程中的應(yīng)用方興未艾。中空鋼夾層板(Hollow SPS deck,簡稱HSPS板)是SPS板的一種改進形式,相比而言具有更高的承載效率和經(jīng)濟性能,在橋面板的應(yīng)用上具有廣泛的前景。國內(nèi)外對HSPS板的研究還處于初始階段,相應(yīng)的研究文獻較少,對其深入研究與推廣應(yīng)用是一個嶄新的領(lǐng)域,尚存在大量未解決的問題。本文基于試驗、理論分析以及數(shù)值模擬技術(shù),對HSPS板的關(guān)鍵制造工藝、合理斷面形式、簡化分析方法及靜力力學(xué)性能進行了研究,為HSPS板的理論、試驗研究以及制造與設(shè)計提供借鑒。本文首先對鋼夾層板的關(guān)鍵制造工藝進行了試驗研究,針對鋼夾層板制造過程中的鋼板表面處理工藝進行優(yōu)化,試驗結(jié)果表明在噴砂清洗后的鋼板表面涂覆膠粘劑,能使鋼板與聚氨酯彈性體間拉伸剪切強度顯著提高,Chemlok-218膠粘劑能使兩者產(chǎn)生較大的平均拉伸剪切強度,從而保證鋼夾層板在使用過程中的可靠粘接,進一步提高鋼夾層板的承載性能。然后對HSPS板的合理斷面形式進行了理論分析,給出HSPS板斷面形式的概念方案,通過對不同概念方案的分析和比選,表明在無芯管方案中,豎向圓形中空方案具有較高的橫向抗彎剛度和面板屈曲穩(wěn)定性,芯層的受力也更合理;鋼質(zhì)芯管的插入能顯著提高HSPS板的縱、橫向抗彎剛度;在結(jié)構(gòu)自重與原材料成本相近的前提下,矩形芯管相對圓形芯管對結(jié)構(gòu)剛度的提高更明顯。再次,針對HSPS板的簡化分析方法進行了探討,首次將基于應(yīng)變能等效的均勻化方法運用于HSPS板的等效彈性常數(shù)預(yù)測中,且在靜、動力學(xué)問題求解中具有較高的精度;針對基于應(yīng)變能等效的均勻化方法在實際使用中操作繁瑣的問題,提出了基于材料力學(xué)分析方法與徑向基函數(shù)(Radial Basis Function,RBF)神經(jīng)網(wǎng)絡(luò)相結(jié)合的簡化算法。在此基礎(chǔ)上,基于經(jīng)典層合板理論,推導(dǎo)了 HSPS板剛度問題的計算公式。最后基于數(shù)值模擬技術(shù),并結(jié)合具體的算例,對兩類橋面系——HSPS板與正交異性鋼橋面板(Orthotropic Steel Deck,OSD)——的靜力力學(xué)性能進行了對比分析。HSPS板因其構(gòu)造上的簡易性,焊縫數(shù)量的大大減少,不僅能提高施工效率,而且能有效解決OSD橋面系疲勞等問題;計算表明,在縱、橫梁與HSPS板的相交處材料應(yīng)力較集中,而局部的補強措施有助于改善縱橫梁支撐處HSPS板的應(yīng)力集中程度;對HSPS板斷面尺寸的參數(shù)分析可知,頂板最大拉應(yīng)力受芯層高度和體積縮減率的影響顯著,底板最大壓應(yīng)力受芯層高度和體積縮減率的影響較弱。
[Abstract]:Steel sandwich plate (Sandwich Plate System deck,) is a new type of composite structure which has been widely used in ship engineering, civil engineering and other fields in recent years, and its application in bridge engineering is in the ascendant. Hollow steel sandwich plate (Hollow SPS deck,) is an improved form of SPS plate, which has higher loading efficiency and economic performance, and has a wide prospect in the application of bridge deck plate. The research on HSPS board at home and abroad is still in the initial stage, and the corresponding research literature is relatively few. It is a new field to study and popularize HSPS board deeply, and there are still a lot of unsolved problems. Based on experiment, theoretical analysis and numerical simulation technology, the key manufacturing process, reasonable section form, simplified analysis method and static mechanical properties of HSPS plate are studied in this paper, which is the theory of HSPS plate. Experimental research and manufacturing and design to provide reference. In this paper, the key manufacturing process of steel sandwich plate is studied, and the steel plate surface treatment process is optimized. The test results show that the steel plate surface is coated with adhesive after sandblasting. The tensile shear strength between the steel plate and polyurethane elastomer can be improved significantly, and the Chemlok-218 adhesive can make the average tensile shear strength between the steel plate and the polyurethane elastomer increase significantly, thus ensuring the reliable bonding of the steel sandwich plate in the process of application. Further improve the bearing capacity of steel sandwich laminates. Then the rational section form of HSPS plate is theoretically analyzed, and the concept scheme of HSPS plate section form is given. Through the analysis and comparison of different concept schemes, it is shown that in the coreless pipe scheme, The vertical circular hollow scheme has higher lateral bending stiffness and buckling stability of the slab, and the stress of the core layer is more reasonable. The longitudinal and transverse bending stiffness of HSPS plate can be significantly improved by inserting the steel core tube, and the stiffness of the rectangular core tube is more obvious than that of the circular core tube on the premise that the weight of the structure is close to the cost of the raw material. Thirdly, the simplified analysis method of HSPS plate is discussed, and the homogenization method based on strain energy equivalence is applied to predict the equivalent elastic constant of HSPS plate for the first time, and it has high accuracy in solving static and dynamic problems. Aiming at the complicated operation of the homogenization method based on strain energy equivalence, a simplified algorithm based on material mechanics analysis method and radial basis function (Radial Basis Function,RBF) neural network is proposed. Based on the classical laminated plate theory, the calculation formula of HSPS plate stiffness problem is derived. Finally, based on the numerical simulation technology and combined with the concrete examples, the static mechanical properties of two kinds of bridge deck systems, HSPS plate and orthotropic steel bridge panel (Orthotropic Steel Deck,OSD, are compared and analyzed. The HSPS plate is easy to construct because of its simplicity. The number of weld can be reduced greatly, not only can improve the construction efficiency, but also can effectively solve the OSD bridge deck fatigue and other problems. The results show that the material stress is concentrated at the intersection of the transverse beam and the HSPS plate, and the local reinforcing measures are helpful to improve the stress concentration of the HSPS plate at the support of the longitudinal and transverse beam. According to the parameter analysis of section size of HSPS plate, the maximum tensile stress of roof is significantly affected by core height and volume reduction rate, while the maximum compressive stress of bottom plate is less affected by core height and volume reduction rate.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U443.31
本文編號：2399258
[Abstract]:Steel sandwich plate (Sandwich Plate System deck,) is a new type of composite structure which has been widely used in ship engineering, civil engineering and other fields in recent years, and its application in bridge engineering is in the ascendant. Hollow steel sandwich plate (Hollow SPS deck,) is an improved form of SPS plate, which has higher loading efficiency and economic performance, and has a wide prospect in the application of bridge deck plate. The research on HSPS board at home and abroad is still in the initial stage, and the corresponding research literature is relatively few. It is a new field to study and popularize HSPS board deeply, and there are still a lot of unsolved problems. Based on experiment, theoretical analysis and numerical simulation technology, the key manufacturing process, reasonable section form, simplified analysis method and static mechanical properties of HSPS plate are studied in this paper, which is the theory of HSPS plate. Experimental research and manufacturing and design to provide reference. In this paper, the key manufacturing process of steel sandwich plate is studied, and the steel plate surface treatment process is optimized. The test results show that the steel plate surface is coated with adhesive after sandblasting. The tensile shear strength between the steel plate and polyurethane elastomer can be improved significantly, and the Chemlok-218 adhesive can make the average tensile shear strength between the steel plate and the polyurethane elastomer increase significantly, thus ensuring the reliable bonding of the steel sandwich plate in the process of application. Further improve the bearing capacity of steel sandwich laminates. Then the rational section form of HSPS plate is theoretically analyzed, and the concept scheme of HSPS plate section form is given. Through the analysis and comparison of different concept schemes, it is shown that in the coreless pipe scheme, The vertical circular hollow scheme has higher lateral bending stiffness and buckling stability of the slab, and the stress of the core layer is more reasonable. The longitudinal and transverse bending stiffness of HSPS plate can be significantly improved by inserting the steel core tube, and the stiffness of the rectangular core tube is more obvious than that of the circular core tube on the premise that the weight of the structure is close to the cost of the raw material. Thirdly, the simplified analysis method of HSPS plate is discussed, and the homogenization method based on strain energy equivalence is applied to predict the equivalent elastic constant of HSPS plate for the first time, and it has high accuracy in solving static and dynamic problems. Aiming at the complicated operation of the homogenization method based on strain energy equivalence, a simplified algorithm based on material mechanics analysis method and radial basis function (Radial Basis Function,RBF) neural network is proposed. Based on the classical laminated plate theory, the calculation formula of HSPS plate stiffness problem is derived. Finally, based on the numerical simulation technology and combined with the concrete examples, the static mechanical properties of two kinds of bridge deck systems, HSPS plate and orthotropic steel bridge panel (Orthotropic Steel Deck,OSD, are compared and analyzed. The HSPS plate is easy to construct because of its simplicity. The number of weld can be reduced greatly, not only can improve the construction efficiency, but also can effectively solve the OSD bridge deck fatigue and other problems. The results show that the material stress is concentrated at the intersection of the transverse beam and the HSPS plate, and the local reinforcing measures are helpful to improve the stress concentration of the HSPS plate at the support of the longitudinal and transverse beam. According to the parameter analysis of section size of HSPS plate, the maximum tensile stress of roof is significantly affected by core height and volume reduction rate, while the maximum compressive stress of bottom plate is less affected by core height and volume reduction rate.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U443.31
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