Additional numerical simulations for highly efficient amplification of local load transmitting areas of timber engineering structures using multiple polymer concrete cast-in joints

使用多个聚合物混凝土预埋接头高效放大木结构工程结构局部荷载传递区域的附加数值模拟

• 批准号: 224551133
• 负责人: Professor Dr.-Ing. Karl Rautenstrauch
• 金额: --
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/224551133?language=en
• 关键词: Additional; numerical; simulations; highly; efficient

In wide-ranging and highly-utilized wood components often occur local overstressing, which often cause cracking systems with associated load shifts particularly in pressure perpendicular to the grain- and transversal forces. Therefore, the recent successful completion of precursory research project new high-efficiency amplification measures for such local load application areas based on of introduced into bores polymer concrete-cast body were first studied fundamentally. This renewal proposal is directly linked to these recent predominantly experimentally obtained results, use this now as a calibration basis for further studies as well as additional parameters by numerical simulations. Mount this further simulation are detailed findings on the influence of stray material properties, the optimal geometric design of the reinforcing measures (bore diameter depth, inclination, etc.) as well as the structural design of multiple arrangements of such reinforcing bodies (assemblies, minimum distances between themselves and of edges etc.) and thus beyond also contribute to enhance the previously experimentally proven gain opportunities significantly. This procedure is proposed here, since it can be realized in the short term and also in comparison to that effect further experimental studies is the least expensive option. Moreover, it is easily possible on this basis, to identify the necessary material properties and relationships of the different causes of failure. Depending on conditions and varying and scattering material properties, it is thus possible to sufficiently reliable numerical mapping previously studied experimental test series and to verify the input parameters and ratios of the respective materials. Furthermore, where appropriate, as required by the first sensitivity studies the external influences and their impact on the life of the reinforcement measures elicited by such simulations and based on, first substantiated information on the required part of the component design reliable parameter constellations are given. The existing from previous experimental trials large data base and associated photogrammetric measurements of the transient deformation fields are ideally suited for the proposed numerical analysis and parametric studies, so that limited due to these circumstances the application solely on the human resources required for this purpose. Further investments are also not required as synergy existing IT equipment and developed under currently ongoing dissertations own software solutions for numerical simulations can be provided free of charge.

在广泛和高度利用的木材组件中，经常发生局部过应力，这通常会导致开裂系统，并伴随着相关的载荷转移，特别是在垂直于纹理的压力和横向力中。因此，近期成功完成的某科研项目针对这类局部荷载应用领域的新型高效放大措施，首次从根本上研究了引入钻孔聚合物混凝土浇注体的方法。这一更新建议与这些最近主要通过实验获得的结果直接相关，现在将其用作进一步研究的校准基础以及通过数值模拟获得的其他参数。在此基础上，对杂散材料特性的影响、加固措施的最佳几何设计（孔径、深度、倾斜度等）进行了详细的分析。以及这种增强体的多种布置的结构设计（组件、它们之间的最小距离和边缘的最小距离等）。因此还有助于显著增强先前实验证明的增益机会。这里提出这个程序，因为它可以在短期内实现，而且与该效果相比，进一步的实验研究是最便宜的选择。此外，在此基础上，很容易识别必要的材料特性和不同故障原因的关系。根据不同的条件和不同的散射材料的特性，因此可以充分可靠的数值映射先前研究的实验测试系列，并验证输入参数和相应材料的比率。此外，在适当的情况下，根据第一次敏感性研究的要求，给出了通过此类模拟得出的外部影响及其对加固措施寿命的影响，并基于关于部件设计可靠参数星座所需部分的第一次证实信息。现有的从以前的实验性试验大数据库和相关的摄影测量的瞬态变形场非常适合拟议的数值分析和参数研究，因此，由于这些情况下的应用程序仅限于此目的所需的人力资源。也不需要进一步的投资，因为现有的IT设备和根据目前正在进行的论文开发的软件解决方案可以免费提供。