新型陶粒泡沫混凝土组合板研究

发布时间：2018-05-08 14:07

本文选题：陶粒泡沫混凝土 + 组合板　；参考：《中国矿业大学》2014年硕士论文

【摘要】：本文是江苏省科技支撑计划“预应力拼装预制轻骨料活动板房研发”项目（编号：BE2010643）的研究子项，旨在研发适用于轻型预制板房的新型轻质混凝土板材。由于泡沫混凝土具有轻质、保温、隔音和耐火等优点，本文以泡沫混凝土为基材，分别与钢筋混凝土和钢材组合，设计制作了钢筋混凝土-陶粒泡沫混凝土组合板和钢-陶粒泡沫混凝土组合板，并对它们进行了受弯试验研究，给出了它们在设计计算和工程应用方面的建议。钢筋混凝土-陶粒泡沫混凝土组合板根据组合层数不同分为单层板、双层板和三层板。设计和制作了11块足尺试件，并对它们进行受弯试验，研究各种组合板的特点和性能，推导得出此类组合板的受弯承载力和开裂荷载的计算公式，，并与实测值比较，验证了计算公式的可靠性和适用性。研究结果表明：现浇叠合制成且不设置抗剪件的组合板，在加载过程中，泡沫混凝土与普通混凝土能协同工作，叠合界面不存在脱开现象；泡沫混凝土位于受拉区的组合板开裂严重，易发生脆性破坏，不建议在工程中应用；泡沫混凝土位于受压区的双层板力学性能较好，适合在现浇板或叠合板中应用；泡沫混凝土位于中间层的三层板力学性能优越，承载力与同等配筋率的普通钢筋混凝土板相当，且能有效减轻自重达40%，适合作为预制板材使用。钢-陶粒泡沫混凝土组合板根据组合钢材分为压型钢板-泡沫混凝土组合板、彩钢板-泡沫混凝土组合板和钢边框-泡沫混凝土组合板。设计和制作了14块足尺试件，并对它们进行受弯试验，研究各类组合板的破坏模式和力学性能，推导得出闭口式压型钢板-泡沫混凝土组合板和钢边框-泡沫混凝土组合板的受弯承载力公式。研究结果表明：抗剪连接件设置不足时，压型钢板-泡沫混凝土组合板易发生纵向剪切粘结破坏；BD闭口式压型钢板与泡沫混凝土组合可以有效发挥各自特点，在减轻自重的同时具有较高的承载力和刚度；彩钢板夹芯板可以采用文中的焊接竖向短钢筋或钢筋网架的方式作为连接件，在连接可靠的前提下，彩钢板能与配筋泡沫混凝土芯板协同受力，有效提高承载力，适合在预制板中应用；钢边框-泡沫混凝土组合板力学性能优越，泡沫混凝土的填充使得组合板相较于纯钢边框可以提高承载力达75%，且尺寸规则，制作工艺简单，可以采用文中推导的受弯承载力公式进行设计计算，适合作为轻质高强预制板材使用。
[Abstract]:This paper is a research item of Jiangsu Science and Technology support Project "Research and Development of Prestressed prefabricated Light aggregate moving Plate House" (No.: Be2010643), which aims to develop new lightweight concrete plate suitable for light prefabricated board house. Because foam concrete has the advantages of light weight, heat preservation, sound insulation and fire resistance, the foam concrete is used as the base material, which is combined with reinforced concrete and steel, respectively. The reinforced concrete-ceramsite foam concrete composite slab and steel-ceramsite foam concrete composite slab are designed and manufactured. The bending test of them is carried out, and some suggestions on their design calculation and engineering application are given. The composite slab of reinforced concrete and ceramsite foam concrete is divided into single layer slab, double layer slab and three layer slab according to the number of composite layers. Eleven full-scale specimens were designed and made, and the bending tests were carried out to study the characteristics and performance of various composite plates. The formulas for calculating the flexural capacity and cracking load of the composite plates were derived and compared with the measured values. The reliability and applicability of the formula are verified. The results show that the composite slabs made of cast-in-place composite without shear resistance can work together with ordinary concrete in the process of loading, and the superimposed interface does not exist the phenomenon of stripping. The composite slab of foam concrete located in the tensile zone has serious cracking and brittle failure, so it is not recommended to be used in engineering, and the double-layer slab with foam concrete located in the compression zone has better mechanical properties, which is suitable for application in cast-in-situ or composite slab. The mechanical properties of foamed concrete in the middle layer are superior, the bearing capacity is equal to that of the common reinforced concrete slab with the same reinforcement ratio, and the self-weight can be effectively reduced to 40%, which is suitable for use as prefabricated slab. The steel-ceramsite foam concrete composite slab is divided into profiled steel plate and foam concrete composite slab, color steel plate foam concrete composite slab and steel border frame foam concrete composite slab. A total of 14 full-scale specimens were designed and made, and the bending tests were carried out to study the failure modes and mechanical properties of various composite plates. The formulas of flexural bearing capacity of closed profiled steel sheet-foam concrete composite slab and steel border-foam concrete composite slab are derived. The results show that when the shear joint is not set enough, the combination of steel sheet and foam concrete can give full play to the characteristics of the composite slab, which is prone to the longitudinal shear bond failure and the combination of BD closed profiled steel plate and foam concrete. The sandwich panel of colored steel plate can be used as the connecting piece by welding the short vertical steel bar or the grid frame of the steel bar in this paper, under the premise of the reliable connection, the bearing capacity and stiffness of the sandwich plate can be improved by reducing the weight of the steel plate at the same time. The color steel plate can work together with reinforced foam concrete core board to effectively improve the bearing capacity, which is suitable for application in prefabricated board, and the steel border concrete composite plate has superior mechanical properties. The filling of foamed concrete makes the composite slab can increase the bearing capacity to 75% compared with the pure steel frame, and the size is regular, the manufacturing process is simple, and the bending bearing capacity formula derived in this paper can be used to design and calculate. It is suitable for use as light weight and high strength prefabricated sheet.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU528

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