George Washington Bridge

Contact metamorphism, or thermal metamorphism, occurs when heat from igneous intrusions, melted rocks that move upward, come in contact with cooler rocks above. The cooler rocks do not melt, but recrystaUize as a result of heating. The Palisades sill, an igneous intrusion, produced contact metamorphism in the rocks into which it intruded, and is well exposed beneath the George Washington Bridge near York City. 

Equilibrium can be ig analogous to traffic flowing both ways on the George Washington bridge [ between New Jersey j and New York, Jl... 

Laura and Enrico Fermi and their two children had moved from a Manhattan apartment in the summer of 1939 across the George Washington Bridge and beyond the Palisades to the pleasant suburb of Leonia, New... 

The towers of the George Washington Bridge were modeled in celluloid at a scale of 140 to 1 in order to study the distribution of strain. Even though these were distorted models, it was subsequently found that predicted values were within 10% of those measured later on the actual structure. The Hoover Dam was modeled at a scale of 240 to 1 before construction, in order to identify and study points of stress concentration. The canyon walls were modeled in concrete while the dam was made of plaster E = 90,000 psi) which is a convenient modeling material for brittle materials. The water pressure on the dam was modeled, using mercury in plastic bags. 

The George Washington Bridge, New York City, with a length of 3500 feet. When it opened, its span nearly doubled the prior record (see Figure 1.11). 

Figure 1.11 The George Washington Bridge. (Courtesy of the Port Authority of New York and New fersey.)...

Yang, J.N., and Giannopoulos, F., "Dynamic Analysis and Active Control of Two Cable-Stayed Bridge," Technical Report No. 2, School of Engineering and Applied Science, The George Washington University, February 1978. 

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