斯图尔特大学的昆虫结构亭子-卓美

Stewart structure pavilion at the university of insects

位置：德国斯图尔特

分类：园林小品

内容：实景照片

景观设计

：斯图尔特大学

图片来源：斯图尔特大学

图片：56张

斯图尔特大学的昆虫结构亭子-8

斯图加特大学的计算机设计研究室和建筑结构实验室共同建造了一个生物亭子，这是一系列新奇设计展示的一部分，来自生物建筑工程专业的学生利用一年的时间打造。这个项目是自然复合材料和机器材料的探索，利用不同的材料构造架构空间，最大化的保证了几何的自由形式。亭子的功能原则和自然光线相结合,创造了一个有模数原型的亭子。在自然光结构的研究中发现一种甲虫的翅膀有更高效的能源性。这种依赖于自然材质的特殊性。利用电脑技术做出了立体的3D模型，这种结构利用了双曲线结构，用柱状物支撑整个结构。根据甲虫壳曲面不同的弧度总结除了整个设计的原则和结构形态。利用玻璃和棉布纤维作为建筑材料，纤维更加强调了复杂的几何效果和抽象的自然结构。

译者：Jevin

The Institute for Computational Design (ICD) and the Institute of Building Structures and Structural Design (ITKE) of the University of Stuttgart have constructed another bionic research pavilion. The project is part of a successful series of research pavilions which showcase the potential of novel design, simulation and fabrication processes in architecture. The project was planned and constructed within one and a half years by students and researchers within a multi-disciplinary team of biologists, paleontologists, architects and engineers.

The focus of the project is a parallel bottom-up design strategy for the biomimetic investigation of natural fiber composite shells and the development of novel robotic fabrication methods for fiber reinforced polymer structures. The aim was the development of a winding technique for modular, double layered fiber composite structures, which reduces the required formwork to a minimum while maintaining a large degree of geometric freedom.

Therefore, functional principles of natural lightweight structures were analyzed and abstracted in cooperation with the Institute of Evolution and Ecology and the department for Paleobiology of the University of Tübingen. Through the development of a custom robotic fabrication method, these principles were transferred into a modular prototype pavilionThis investigation of natural lightweight structures was conducted in an interdisciplinary cooperation of architects and engineers from Stuttgart University and biologists from Tubingen University within the Module: Bionics of Animal Constructions led by prof. Oliver Betz (biology) and Prof. James. H. Nebelsick(geosciences). During the investigation, the Elytron, a protective shell for beetles’ wings and abdomen, has proved to be a suitable role model for highly material efficient construction. The performance of these lightweight structures relies on the geometric morphology of a double layered system and the mechanical properties of the natural fiber composite. The anisotropic characteristic of this material, which consists of chitin fibers embedded in a protein matrix, allows for locally differentiated material properties.

In cooperation with the ANKA Synchrotron Radiation Facility and the Institute for Photon Science and Synchrotron Radiation at the Karlsruhe Institute of Technology (KIT), high resolution 3D models of various beetle elytra were extracted through micro-computed tomography. Together with SEM scans from the University of Tübingen, this enabled an analysis of the intricate internal structures of the beetle shell. The Elytra morphology is based on a double layered structure which is connected by column-like doubly curved support elements, the trabeculae. The fiber layout within a trabecula merges the upper and lower shell segments with continuous fibers. The distribution and geometric articulation of the trabecula is highly differentiated throughout the beetle shell. Through comparative studies of multiple flying beetle species the underlying structural principles could be identified and translated into design rules for structural morphologies.

Based on the differentiated trabeculae morphology and the individual fiber arrangements, a double layered modular system was generated for implementation in an architectural prototype. Through the development of computational design and simulation tools, both the robotic fabrication characteristics and the abstracted biomimetic principles could be simultaneously integrated in the design process.

Glass and carbon fiber reinforced polymers were chosen as building material, due to their high performance qualities (high strength to weight ratio) and the potential to generate differentiated material properties through fiber placement variation. Together with their unrestrained moldability, fiber reinforced polymers are suitable to implement the complex geometries and material organizations of the abstracted natural construction principles. Conventional fabrication methods for fiber composite elements require a mold to define form. However, this method proves to be unsuitable to transfer natural construction principles into architectural applications since they usually involve unique elements that would require extensive formwork and prohibitively complex molds.

For the fabrication of the geometrically unique, double curved modules a robotic coreless winding method was developed, which uses two collaborating6-axis industrial robots to wind fibers between two custom-made steel frame effectors held by the robots. While the effectors define the edges of each component, the final geometry is emerging through the interaction of the subsequently laid fibers. The fibers are at first linearly tensioned between the two effector frames. The subsequently wound fibers lie on and tension each other which results in a reciprocal deformation. This fiber–fiber interaction generates doubly curved surfaces from initially straight deposited fiber connections. The order in which the resin impregnated fiber bundles (rovings) are wound onto the effectors is decisive for this process and is described through the winding syntax. The specific sequence of fiber winding allows to control the layout of every individual fiber leading to a material driven design process. These reciprocities between material, form, structure and fabrication are defined through the winding syntax which therefore becomes an integral part of the computational design tool.

The effectors are adjustable to various component geometries, leading to only one reconfigurable tool setup for all 36 elements. Coreless filament winding does not only save substantial resources through the needlessness of individual molds, but in itself is a very material efficient fabrication process since there is no waste or cut-off pieces.n total 36 individual elements were fabricated, whose geometries are based on structural principles abstracted from the beetle elytra. Each of them has an individual fiber layout which results in a material efficient load-bearing system. The biggest element has a 2.6 m diameter with a weight of only 24.1 kg. The research pavilion covers a total area of 50 m² and a volume of 122 m³ with a weight of 593 kg.

The overall geometry reacts to site-specific conditions of the public space around the university building in close proximity to the park. At the same time it demonstrates the morphologic adaptability of the system, by generating more complex spatial arrangements than a simple shell structure. Altogether the research pavilion shows how the computational synthesis of biological structural principles and the complex reciprocities between material, form and robotic fabrication can lead to the generation of innovative fiber composite construction methods. At the same time the multidisciplinary research approach does not only lead to performative and material efficient lightweight constructions, it also explores novel spatial qualities and expands the tectonic possibilities of architecture.

斯图尔特大学的昆虫结构亭子-20