Advanced structural materials offer unique properties and performance characteristics that can revolutionize the design and construction of civil engineering structures. Craft a theoretical exploration of advanced structural materials, encompassing concepts like high$-$performance concrete, fiber$-$reinforced polymers, and smart materials. Discuss theoretical models for predicting the behavior and durability of advanced materials under different loading and environmental conditions, such as multi$-$scale modeling techniques and constitutive modeling approaches. Explore theoretical approaches to integrating advanced materials into structural design and construction processes, and analyze their potential to enhance structural performance, durability, and sustainability.