| Two parallel bridges is a common layout style. Because of short distance of the main beam, in the airflow, Upstream beam and downstream beam will have interaction with each other, Which is called' Aerodynamic interference effects' of two parallel bridges.Two parallel continuous rigid frame bridges is common structure in highway construction, Usually it's build by balance cantilever construction, it induce the structural stiffness to reduces, to the disadvantage of wind-resistant design.'Aerodynamic interference effects' of the parallel bridges will change the dynamic load on the beam, Causing vortex resonance and buffeting. This will seriously affect the safety of construction operations to adversely affect the bridge structure. In order to study the 'Aerodynamic interference effects' of the continuous rigid frame bridge construction, main research content in this paper is circled as follow:1. Through aeroelastic models wind tunnel testing, in the specified wind field, to obtain the displacement and acceleration response data in single bridge and two parallel bridges condition。2. Comparison the displacement spectrum of along-bridge, across-bridge and Horizontal rotation, with different speed, different spacing and 0°wind direction.3. Comparison the vibration energy and damping power of along-bridge, across-bridge and Horizontal rotation, with different speed, different spacing and 0°wind direction.4. Based on the above two kinds of comparison, acquire the various physical interference factors, and discuss the negative condition.
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