A Dual-Shell Coastal High-Rise Architecture Integrating Structural Load Transformation and Passive Environmental Regulation

High-rise buildings in coastal and riverfront environments are subjected to intensified and coupled environmental and structural stresses, including elevated wind velocities, increased turbulence intensity, high humidity and salinity, pronounced solar radiation, and constrained urban footprints. Conventional tall-building systems typically address these demands through bending-dominated structural resistance and mechanically driven environmental control, resulting in high material consumption, elevated embodied carbon, and long-term operational energy dependence. This study proposes a dual-shell vertical high-rise architectural system in which geometry itself functions as an integrated structural and environmental mechanism. The building consists of two vertically continuous, symmetrically curved exoskeletal shells that enclose occupied floor plates and a full-height central void. Gravitational and lateral wind loads are redistributed through shell membrane action into compression-dominant load paths, significantly reducing bending moments and shear demand relative to conventional frame–core typologies. Analytical and comparative modeling indicate potential reductions of 30–50% in global bending stresses and 25–40% in peak lateral drift, while enhanced shell separation increases torsional stiffness by approximately 40–60%, improving aerodynamic stability and occupant comfort without reliance on auxiliary damping systems. The enclosed central vertical void operates as a passive ventilation chimney, exploiting stack-driven buoyancy effects augmented by coastal pressure differentials and unobstructed wind inflow. Thermal and airflow modeling suggest 20–35% reductions in mechanical ventilation and cooling demand, particularly in warm and humid coastal climates. The curved shell geometry further provides self-shading and thermal buffering, yielding an estimated 15–30% reduction in peak solar heat gain while maintaining diffuse daylight penetration. By integrating structural load transformation, aerodynamic moderation, and passive environmental regulation within a single coherent architectural form, the proposed dual-shell framework demonstrates a material-efficient, energy-responsive, and climate-resilient high-rise typology. The system is scalable across height ranges of approximately 150–400 m and adaptable to tropical, subtropical, and temperate waterfront cities. The study establishes a robust foundation for further finite element structural analysis, computational fluid dynamics validation, and life-cycle carbon assessment, positioning geometry-driven design as a viable pathway for sustainable and resilient coastal high-rise development......Please check the attachment for details