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Pergamon Bridge
The Pergamon Bridge is a Roman substruction bridge over the Selinus river (modern ''Bergama Çayı'') in the ancient city of Pergamon (today Bergama), modern-day Turkey. The wide structure, the largest of its kind in antiquity, was designed during Hadrian's reign (AD 117–138) in order to form a passageway underneath a large court in front of the monumental " Red Basilica" temple complex. The two intact tubes, which consist of supporting walls covered with barrel vaults, still serve their purpose to this day. Classification as bridge substruction Although the Pergamon Bridge is, due to its extraordinary width, often misleadingly called a tunnel, it should rather be treated as a bridge substruction, since the entire structure was erected above ground, which necessitates construction techniques more akin to bridge building and very different from those employed in tunnel-driving. For urban development, such substructions are regarded as particularly useful for providing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Basilica
Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and a secondary color (made from magenta and yellow) in the CMYK color model, and is the complementary color of cyan. Reds range from the brilliant yellow-tinged scarlet and vermillion to bluish-red crimson, and vary in shade from the pale red pink to the dark red burgundy. Red pigment made from ochre was one of the first colors used in prehistoric art. The Ancient Egyptians and Mayans colored their faces red in ceremonies; Roman generals had their bodies colored red to celebrate victories. It was also an important color in China, where it was used to color early pottery and later the gates and walls of palaces. In the Renaissance, the brilliant red costumes for the nobility and wealthy were dyed with kermes and cochineal. The 19th century broug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springing Level
An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam An arch dam is a concrete dam that is curved upstream in plan. The arch dam is designed so that the force of the water against it, known as hydrostatic pressure, presses against the arch, causing the arch to straighten slightly and strengthen ..., the hydrostatic pressure against it. Arches may be synonymous with Vault (architecture), vaults, but a vault may be distinguished as a continuous arch forming a roof. Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were Roman Architectural Revolution, the first to apply the technique to a wide range of structures. Basic concepts An arch is a pure compression form. It can span a large area by resolving forces into compressive stresses, and thereby eliminating tens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
