Structural mechanics is a branch of engineering that focuses on understanding how structures, like buildings and bridges, respond to various forces and loads. It involves analyzing materials and shapes to ensure that structures can support weight, resist environmental factors, and maintain stability over time. Engineers use principles from physics and mathematics to predict how structures will behave under different conditions. This includes studying stress, strain, and deformation to design safe and efficient structures. By applying these concepts, engineers can create designs that are not only functional but also durable and resilient against potential failures.