Triangles are simple to construct and calculate loads on (important prior to the advent of computers). Many bridges combine some of both. And note: many suspension bridge configurations are inverted arches.thezi said:
To make accurate (accurate enough to be temptingly stronger than triangles built from trivial straight elements) circles and arches is not an easy ( or cheap) task at that size. Big CNC still comes with horrible bills.thezi said:
Arch bridges are curved structures that distribute weight evenly along the curve, while truss bridges use a series of interconnected triangles to evenly distribute weight across the entire structure.
Both arch and truss bridges can be strong and durable, but the strength of a bridge depends on many factors such as materials used, design, and construction techniques. Generally, arch bridges are better suited for shorter spans, while truss bridges are better for longer spans.
Arch bridges can be made from a variety of materials including stone, brick, concrete, and steel. Truss bridges are typically made from steel or wood, but can also use other materials such as concrete or iron.
Engineers consider many factors when designing a bridge, including the span length, terrain, expected traffic load, and budget. They use computer simulations and physical models to test different designs and determine the most efficient and safe option.
The Golden Gate Bridge in San Francisco, California is a famous example of a suspension truss bridge. The Pont du Gard in France is an ancient Roman aqueduct that features multiple arches. Other notable arch bridges include the Sydney Harbour Bridge in Australia and the Ponte Vecchio in Florence, Italy.