Currently, global warming problem is serious. One of reasons of global warming is CO2 emissions. As an alternative means to prevent this, there is an environment-friendly effect of modular bridge method.
After analyzing the CO2 emissions of the steel modular bridge which is used in a modular bridge
based on D/B W.B.S analysis program and by comparing the CO2 emissions with that of the similar type of bridge, it is intended to analyze the environmental-friendly of modular bridge through the evaluation of the CO2 emissions of modular steel girder bridge of 21m.

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