Structural theory and innovative technology of concrete-filled steel tubular bridges 并列题名：Structural theory and innovative technology of concrete-filled steel tubular bridges Construction process and key techniques of concrete-filled steel tubular arch bridges Maintenance and renovation technology for large span steel truss bridges Practical and innovative technologices for welding of steel structures 并列题名：Maintenance and renovation technology for large span steel truss bridges Rehabilitation technology of centennial steel truss bridge 并列题名：Practical and innovative technologices for welding of steel structures 并列题名：Rehabilitation technology of centennial steel truss bridge