Experimental Study of Concrete Filled Steel Box Arch Bridge under Special Type Load

The experimental test on concrete filled steel box arch bridge which is the first bridge in China is presented under the special type load NHL 3307. The numerical results of the test is analyzed by general program SAP5 and program CFSB in which the steel box restriction for the concrete is taken into account. The results indicate that the steel box has a good restriction for the concrete in steel box, the force distribution of its structure is reasonable and its rigidity is very bigger.