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

CC技术是一种生产木材结构几何异型板的方法，在建筑产品中被称为管状刨花板或中空芯质刨花板。CC技术的名称来源于跨通道技术，描述了板材中规则间隔的几何内交叉通道。与具有相同厚度的实心板相比，这种系统腔显著减轻了重量。由于特殊的几何形状，生产是通过组装板材的一半来完成的。相交的接触面是由规则重复的半通道形成的，因此，两半可以通过将一个连接件投影到另一半上的匹配凹槽中而相互连接，该连接件被称为一半上的“驼峰”。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、天花板和立面构件。本研究的目的是对细粒混凝土(水泥、砂子、无碎石)混凝土板作为普通建筑产品如天花板和墙板的承载能力进行系统的研究。还可以介绍CC板的分类，例如类似于Ortepp为纺织钢筋混凝土引入的术语，其中L代表“孔尺寸”，k_ef是由孔面积、截面对称性(A_L)和总面积(A_B)的比率得出的因子。主要焦点转向使用细混凝土(例如Pagel TF-10TUDALIT)制作约8厘米厚的外立板(如天花板和墙板厚度约为20厘米的普通钢筋混凝土)。由于连铸板的基本性能尚不清楚，因此应使用适当的承载和失效模型来描述其过程。目前，关于复合材料基本结构行为的信息还不够充分，因此数值模拟本身不足以反映复合材料中效应的复杂性。除了理论研究外，还计划进行一项广泛的实验测试计划，通过调查小尺寸试件在静态载荷下的行为来校准计算模型。在研究的实验部分，应该测试不同的CC板，有无加强，形状不同(例如，有无开口)和厚度。最终的分析模型可以在组合荷载作用下的CC板上进行独立的全尺寸试验后得到验证。

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.