Research into the load bearing behaviour of light construction concrete slabs made by using Cross-Channel-Technology

跨通道技术轻质建筑混凝土板的承载性能研究

• 批准号: 257052528
• 负责人: Professor Dr.-Ing. Wolfram Jäger
• 金额: --
• 依托单位: Professur für Tragwerksplanung
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/257052528?language=en
• 关键词: Research; into; load; bearing; behaviour

The CC-technology is an approach to producing structural geometric shaped plates made of wood, which in construction product are known as Tubular chipboard or Hollow Core Chipboard. The name of CC technology comes from cross-channel technology and describes the geometric inner cross channels at regular intervals in the plate. This systematic cavities lead to significant weight reduction when compared to solid plates having the same thickness. Because of especial geometry, the production is done by assembling the halves of plate. The intersecting contact surface is formed by regularly repeating half-channels, therefore , the two halves can be jointed to each other by projection of one connector, called the "humps" on one half into a matching groove on the next half. The Idea of transmission this technology to producing concrete panels has enormous potential for example this method can be implemented for production of light walls, ceiling and facade elements made of concrete. The aim of this research is the methodical study on the load carrying capacity of CC plates of fine concrete (cement and sand, no gravel) as normal construction product such as ceilings and wall panels. Also classification of the CC plate can be introduced, for example similar to the terms which are introduced by Ortlepp for textile-reinforced concrete, in which L stands for "hole dimension" k_eff is factor from the ratio of hole area, of the symmetry of section (A_L) and gross area (A_b). The main focus is turned to use of fine concrete (e.g. Pagel TF-10 TUDALIT) for the production facade panels of about 8 cm thickness (in case of ceiling and wall panels thickness of about 20 cm normal reinforced concrete is to be used). Since the basic behavior of CC plates is not known yet, the processes should be described with an appropriate bearing and failure model. Currently sufficient information for the basic structural behavior does not exist; therefore numerical simulation itself is not enough to represent the complexity of effects in the composite materials. In addition to theoretical studies, an extensive experimental test program is planned to calibrate the calculation models by investigating the behavior of small-scale specimens under static load. In experimental part of research different CC plates, with and without reinforcement with varying in shape (e.g. with and without openings) and thicknesses should be tested. The final analytical model could be approved after independent full-scale tests on CC plates under combination of loads.

CC技术是一种生产由木材制成的结构几何形状板的方法，在建筑产品中称为管状纤维板或空心纤维板。CC技术的名称来自交叉通道技术，描述了板中规则间隔的几何内部交叉通道。当与具有相同厚度的实心板相比时，这种系统的空腔导致显著的重量减轻。由于特殊的几何形状，生产是通过组装板的一半。相交的接触表面由规则地重复的半通道形成，因此，两个半部可以通过一个连接器（在一个半部上被称为“隆起”）突出到下一个半部上的匹配凹槽中而彼此接合。将这种技术传输到生产混凝土面板的想法具有巨大的潜力，例如这种方法可以用于生产由混凝土制成的轻质墙壁，天花板和立面元件。本研究的目的是对细混凝土（水泥和砂，无砾石）CC板作为天花板和墙板等普通建筑产品的承载能力进行系统研究。还可以引入CC板的分类，例如类似于Ortlepp为织物增强混凝土引入的术语，其中L代表“孔尺寸”，k_eff是孔面积、截面对称性（A_L）和总面积（A_B）的比率的因子。主要焦点转向细混凝土（例如Pagel TF-10 TUDALIT）用于约8 cm厚的生产外墙板（在天花板和墙板厚度约为20 cm的情况下，将使用普通钢筋混凝土）。由于CC板的基本行为是未知的，过程中应描述一个适当的轴承和故障模型。目前还不存在足够的基本结构行为的信息，因此数值模拟本身不足以代表复合材料中的复杂效应。除了理论研究，一个广泛的实验测试计划，计划通过调查静态载荷下的小规模试样的行为来校准计算模型。在研究的实验部分中，应测试不同的CC板，具有和不具有不同形状（例如，具有和不具有开口）和厚度的加强件。最终的分析模型可以通过独立的足尺试验CC板在组合载荷下。