Bridges Jordan Suspension Bridges The 25 th of

Bridges Jordan

Suspension Bridges • The 25 th of April suspension bridge in Lisbon, Portugal is one of the world's longest suspension bridges at 1. 5 miles (2. 2 kilometers) long. Built in 1966, it looks much like San Francisco's Golden Gate Bridge, and it should, since it was constructed by the same builders.

Arch Bridges • The Cold Spring Arch Bridge on Highway 154 is just about 16 miles (25 km) northwest of downtown Santa Barbara, CA. The highway crosses San Marcos Pass in the Santa Ynez Mountains on its way between the coastal Santa Barbara area and the inland Santa Ynez Valley. My vantage point is along Stagecoach Road seen here winding down underneath the bridge. Thunderclouds are hovering above the distant San Rafael Mountains.

• Beam Bridges This is a bridge on GA SR 100 spur over Hackney Branch. We have a small seismic area in GA and this bridge fell within that zone, so I did a seismic Category B analysis on it. The pictures to follow will likely be fairly boring except maybe to other engineers or people that ask about my bridges or maybe those folks smart enough to just love looking at bridges. I am fortunate to have worked for the last 12 years for GA DOT and I have done portions of many bridges. This was the first one that I designed completely from start to finish. So it is much like my first child. The bridge is constructed with concrete slab on pre stressed concrete beams and is skewed 55 degrees. It falls completely within the positive grade of a vertical curve and there is no horizontal curve. The bridge consists of 2 - 90' spans using 72 inch bulb tees and 1 72' span using AASHTO Type III beams. It has pile end bents and the intermediate bent substructure consists of cast in place concrete columns with pile footings. The columns range from 35’ at Bent 2 to 30’ at Bent 3.

Cable stayed bridge • Comprised of six spans with three cable-stayed central spans hosting an impressive 345 metre main span - the Anzac Bridge is the longest span cable-stayed bridge in Australia. The initial design was a two cell prestressed concrete box girder with three main spans (125 metres, 200 metres and 125 metres respectively) built with the balanced cantilever method. However, as most of the water's commercial and pleasure craft use no pilot or tug, the potential environmental impact of a pier collision with possible subterranean damage, was deemed unacceptable.