CAREER: Programming Multi-functional Responses into Civil Structures via Topology Optimization

这个教师早期职业发展（CAREER）计划将探索拓扑优化（即，针对给定的设计标准找到结构的最佳形状），以创建并实现具有各种独特且可调的多功能的下一代大型土木结构。本研究中设想的下一代土木结构不仅在正常条件下改善建筑环境，而且还积极应对危险条件，以更好地应对它们。梁、柱和面板等结构将采用优化的形状和材料构成，嵌入刺激响应材料，以释放非常规响应和适应性。这项研究将从根本上改善土木结构的风险缓解和多功能性。所创造的知识也将使其他领域的进步，如航空航天结构，建筑材料和超材料。围绕结构设计优化的教育和推广计划将以积极，互动和沉浸式学习的理念执行。活动包括创建沉浸式教育工具，积极学习为基础的外联K-12和代表性不足的群体，多学科课程开发，并通过与从业者合作，加强学术界/产业界的互动。本研究的具体目标是创建多功能土木结构和组件，具有足够的承载能力和有效的材料使用。多功能性包括各种非常规的载荷-位移响应以及通过独特的多材料和多物理拓扑优化方法通过磁致动调整和适应结构特性的能力。其研究目标是：（1）建立一个综合考虑几何形状、多种材料和复杂多物理相互作用的结构框架;（2）建立一个基于优化的理论来规划结构在机械载荷和多物理激励下的响应和适应性;（3）创建具有多功能的优化结构;（4）具有程序响应和适应性的原型和测试结构，并探索实际问题以校准理论。这项研究的首要主题是利用由多种材料制成的结构来扩大设计空间，并利用多物理相互作用，以最小的努力实现适应性。该项目将推动多功能土木工程结构领域的发展，并为广泛的应用开辟可能性，这些应用可以改变此类结构的设计和建造方式，使其更加高效，弹性和可持续。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This Faculty Early Career Development (CAREER) program will explore topology optimization (i.e., finding the optimal shape of a structure for given design criteria) to create and enable next-generation large-scale civil structures with a variety of unique and tunable multi-functionalities. The next-generation civil structures envisioned in this research do not only improve built environment in normal conditions, but also actively respond to hazardous conditions to better respond to them. Structures, such as beams, columns, and panels, will be created with optimized shapes and material constitutions, embedded with stimuli-responsive materials, to unlock unconventional responses and adaptability. This research will result in fundamental improvements for risk mitigation and multi-functionality of civil structures. The knowledge created will also allow advancement in other fields, such as aerospace structures, architected materials, and metamaterials. An education and outreach program that centers around structural design optimization will be executed with the philosophy of active, interactive, and immersive learning. The activities include creating immersive education tools, active learning-based outreach to K-12 and underrepresented groups, multidisciplinary course development, and enhancement of academia/industry interactions through collaborations with practitioners.The specific goal of this research is to create multi-functional civil structures and components, with sufficient load-bearing capacity and efficient material usage. The multi-functionality includes a variety of unconventional load-displacement responses and the ability to tune and adapt structural properties via magnetic actuation through a unique multi-material and multi-physics topology optimization approach. The research objectives are to: (1) establish an integrated structural framework that considers geometry, multiple materials, and complex multi-physics interactions; (2) formulate an optimization-based theory to program the structural responses and adaptability subjected to mechanical load and multi-physical stimuli; (3) create optimized structures with multiple functions; and (4) prototype and test structures with programmed responses and adaptability, and explore practical issues to calibrate the theory. The overarching theme of this research is to harness structures made of multiple materials to enlarge the design space and exploit multi-physics interactions to enable adaptability with minimal effort. This project will advance the field of multi-functional civil engineering structures and opens up the possibility for a broad range of applications that can transform how such structures are designed and constructed, and make them more efficient, resilient, and sustainable.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.