Integrated construction technology of small and mid-span assembled steel-concrete composite bridge Key construction technology for piers and caps of assembled cross-sea bridge 并列题名：Key construction technology for piers and caps of assembled cross-sea bridge Connection technology and seismic design of prefabricated steel-concrete composite bridge pier 并列题名：Connection technology and seismic design of prefabricated steel-concrete composite bridge pier conceptual and structural design of steel and steel-concrete composite bridges