Prestressed Concrete Continuous Rigid Frame Bridge 0 # Block Stress Analysis And Testing

According to the achieved percentage of construction for Santan Yellow River bridge, this paper makes a comprehensive analysis about the zero block where distribution of stress is the most complex in the continuous rigid frame bridge. The main contents are as follows: ? Making three 梔imension stress analysis to the deck, web and bottom plate of the zero block. ? Taking supervised tests for different construction phases of bridge. ? Giving an evaluation to the structure performance of the original design. After comparing the results between the theoretical calculation and the test of the bridge, this paper inquires the change regulation of the zero block stress (strain), finds Out the region where stress is rather large and easy to crack, perfects the zero block three- dimension calculation model, provides scientific and effective measure for next construction step and future rigid frame bridge design. During three-dimension stress calculation, Shrinkage, temperature and time-dependent are considered, then this paper gets accurate secondary stress distribution regulation under construction, so as to determine a better method to reduce crack region, calculate and tests the zero block stress for the most disadvantageous load combination under construction and on service, and provide dependable foundation for optimal design and construction scheme of the block.