$>>$ Describe the fundamental principles and methods involved in the design and analysis of structural systems in civil engineering, focusing on the theoretical frameworks that guide the evaluation of load$-$bearing capacities, stability, and durability. Include a detailed discussion of the various types of loads $($e$.$g$.,$ dead loads, live loads, environmental loads$)$ and how they are calculated and accounted for in structural design. Additionally, explain the importance of material properties in the selection process and how engineers use stress$-$strain relationships, factor of safety, and other criteria to ensure that structures can withstand anticipated forces over their intended lifespan. In your explanation, address how modern computational tools and simulation software have transformed traditional practices in structural analysis and design, allowing for more precise and efficient evaluations of complex structures. Lastly, discuss the role of building codes and standards in guiding the design process and ensuring that structures meet safety and performance requirements.