该装置是由三根斜柱支撑的波纹拱形壳结构。其中，由3mm不锈钢板制成、跨度为7m的单面结构是这座拱形雕塑的一部分。三个穿孔拱构成一道门，迎接来自三个方向的人汇聚于此。3mm不锈钢板经过平整处理和激光切割，形成坚固的立体造型，刚性几何和超轻结构则最大限度地减少了重量和损耗，体现出Tonkin Liu事务所和Arup工程团队开创的壳网结构原理。在阳光的照射下，133个棱镜嵌体映射出彩虹光。该装置应用先进的数字设计、工程技术和制造工具，恰好位于在先进制造业取得卓越成就的伯恩利预科学校前方。

Rain Bow Gate is a corrugated vaulted shell structure supported on three inclined columns. Constructed from 3mm stainless steel spanning 7 metres, the single surface structure gives this arched sculpture its strength. Three perforate arches form a gate that welcomes people from three directions, where three routes converge. A strong three-dimensional form constructed from flat, laser-cut, 3mm steel sheets, the geometrically-stiff, ultra-light structure minimises weight and wastage, demonstrating the Shell Lace Structure’s principles pioneered by Tonkin Liu and engineers at Arup. With beams of sunlight, 133 glass prism inserts cast rainbow-coloured light. Rain Bow Gate embraces cutting-edge digital design, engineering, and fabrication tools, appropriately sited here in front of a sixth form college in Burnley, the centre of excellence in advanced manufacturing.

▼装置鸟瞰，aerial view ©Greg Storrar

设计任务

The brief

该装置的竞赛由伯恩利议会发起，他们希望通过这件公共艺术作品提升公主路门户——教育与企业区的形象。教育与企业区包括新中央兰开夏大学、伯恩利学院以及预留开发用地，公主路与之平行，位于伯恩利市中心以北。该项目受到欧洲地区发展基金、Homebase Section 106基金、Sustrans机构、伯恩利学院和伯恩利议会资助，旨在在校园入口处创造更好的公共空间，并为伯恩利游客和居民塑造积极而独特的第一印象。最终的设计现代、大胆、创新且具有高品质，壮大了伯恩利重燃的改进雄心。该项目还形成对伯恩利十分重要的三种品质：自然、活力和关联。

The artwork competition organised by Burnley Borough Council looked to commission a piece of public artwork to enhance the image and improve overall perceptions of the Princess Way Gateway – Education & Enterprise Zone. The Education & Enterprise Zone includes the new University of Central Lancashire, the Burnley College Campus, and a development site set aside for future investment. Princess Way runs parallel to this, north of Burnley town centre. The project was funded by the European Regional Development Fund, Homebase Section 106 funds, Sustrans, Burnley College, and Burnley Council. The aim was to create an improved public space at the campus entrance, and provide a positive, distinct first impression for visitors and residents of Burnley. This led to the development of a contemporary, bold, creative, innovative and high quality design which raised the profile of Burnley’s renewed ambition for improvement. The project yielded three qualities held as important to Burnley: natural, animated, and connected.

▼装置外观，appearance ©Tonkin Liu

▼市民参与的公共空间，public space for citizen participation ©Tonkin Liu

壳网结构

Shell Lace Structure

壳网结构是一种源于自然的结构技术。贝壳通过完善的曲线外形获得强度，通过波纹肌理获得刚度。在该装置中，穿孔使构件变轻，以最小的重量和损耗打造出高效而灵活的结构。去年，Tonkin Liu建筑师团队与Arup的工程师Ed Clark合作，通过数字建模、数字分析和数字制造工具的研发与实验，开创了这项结构技术。连结的延展曲面构成立体几何，这些曲面在接缝处展开并嵌套，便于对平板材料进行高效的激光切割。切割的轮廓被重新组装，从而形成最终的几何体，即新型单面结构。

▼网壳结构，Shell Lace Structure ©Tonkin Liu