Evaluate the various methods and principles used in the analysis and design of reinforced concrete structures in civil engineering. Specifically, discuss the underlying theories and approaches, such as working stress method, ultimate load method, and limit state design. How do these methodologies differ in terms of their conceptual framework, assumptions, and application to structural safety and serviceability? Additionally, explore how modern advancements in materials and computational techniques have influenced these traditional methods, considering both theoretical and practical perspectives. What are the implications of these advancements on the future of reinforced concrete design, and how should civil engineers adapt their practices to incorporate new technologies and materials while ensuring compliance with existing codes and standards?