What weather conditions are needed for bridge closure and why?

When the relative temperature of the bridge site is low, the closure requires high requirements for large bridges, such as continuous rigid-frame bridges, especially arch bridges, which need to be constructed at the average low temperature all the year round. Because it is necessary to strictly control the tensile stress of arch bridge, continuous rigid frame bridge and other bridges, if they are closed at high temperature, the bridge will be in a state of cold contraction at low temperature, which will lead to tensile stress of the bridge, which is not good for the bridge. However, when the bridge is closed at low temperature, the compressive stress caused by thermal expansion of the bridge at high temperature is beneficial to the stability of the bridge, especially the arch bridge.