To pursue high performance and economy to the greatest extent, composite structure bridge uses steel with strong tensile performance and concrete with good compressive property in the component tensile region and compressive zone; with rational combination of steel and concrete, composite structure bridge has better mechanical performance and economy than steel structure bridge and concrete bridge.

Composite structure bridge plays an important part in bridge construction of Europe, America, Japan and other countries, especially Germany and America, because of its economy of overall stress, rationality of showing own advantages of steel and concrete, convenient construction and other advantages.

While in China, the technology level of composite structure bridge is far behind international advanced level. We still need to continue innovation for constructing high quality bridge on the basis of past successful experience and present advanced technology.