中空钢夹层桥面板的设计开发与受力性能研究
发布时间：2019-01-03 10:38
【摘要】：钢夹层板(Sandwich Plate System deck,简称SPS板)是近年来在船舶工程、土木工程等领域取得较广泛应用的新型组合结构,在桥梁工程中的应用方兴未艾。中空钢夹层板(Hollow SPS deck,简称HSPS板)是SPS板的一种改进形式,相比而言具有更高的承载效率和经济性能,在桥面板的应用上具有广泛的前景。国内外对HSPS板的研究还处于初始阶段,相应的研究文献较少,对其深入研究与推广应用是一个崭新的领域,尚存在大量未解决的问题。本文基于试验、理论分析以及数值模拟技术,对HSPS板的关键制造工艺、合理断面形式、简化分析方法及静力力学性能进行了研究,为HSPS板的理论、试验研究以及制造与设计提供借鉴。本文首先对钢夹层板的关键制造工艺进行了试验研究,针对钢夹层板制造过程中的钢板表面处理工艺进行优化,试验结果表明在喷砂清洗后的钢板表面涂覆胶粘剂,能使钢板与聚氨酯弹性体间拉伸剪切强度显著提高,Chemlok-218胶粘剂能使两者产生较大的平均拉伸剪切强度,从而保证钢夹层板在使用过程中的可靠粘接,进一步提高钢夹层板的承载性能。然后对HSPS板的合理断面形式进行了理论分析,给出HSPS板断面形式的概念方案,通过对不同概念方案的分析和比选,表明在无芯管方案中,竖向圆形中空方案具有较高的横向抗弯刚度和面板屈曲稳定性,芯层的受力也更合理;钢质芯管的插入能显著提高HSPS板的纵、横向抗弯刚度;在结构自重与原材料成本相近的前提下,矩形芯管相对圆形芯管对结构刚度的提高更明显。再次,针对HSPS板的简化分析方法进行了探讨,首次将基于应变能等效的均匀化方法运用于HSPS板的等效弹性常数预测中,且在静、动力学问题求解中具有较高的精度;针对基于应变能等效的均匀化方法在实际使用中操作繁琐的问题,提出了基于材料力学分析方法与径向基函数(Radial Basis Function,RBF)神经网络相结合的简化算法。在此基础上,基于经典层合板理论,推导了 HSPS板刚度问题的计算公式。最后基于数值模拟技术,并结合具体的算例,对两类桥面系——HSPS板与正交异性钢桥面板(Orthotropic Steel Deck,OSD)——的静力力学性能进行了对比分析。HSPS板因其构造上的简易性,焊缝数量的大大减少,不仅能提高施工效率,而且能有效解决OSD桥面系疲劳等问题;计算表明,在纵、横梁与HSPS板的相交处材料应力较集中,而局部的补强措施有助于改善纵横梁支撑处HSPS板的应力集中程度;对HSPS板断面尺寸的参数分析可知,顶板最大拉应力受芯层高度和体积缩减率的影响显著,底板最大压应力受芯层高度和体积缩减率的影响较弱。
[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.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U443.31
本文编号：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.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U443.31
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