Study On The Deflection Measurement Method Of Bridge

The deflection of bridge is one of the most important targets in bridge structure security, so bridge engineers and technicians proposed several effective ways on measuring the deflection. Based on analyzing some common techniques in measuring the deflection of bridge, this article proposes a new method on measuring the deflection of bridge with inclinometer.Lay aside the inclinometer on the bridge according to certain rules, get the inclination value of related section, then fit the deflection curve of the bridge, as a result, we can get the deflection of any bridge section. Combining with indoor model beam experiment, this article has studied on the fitting method of the deflection curve, given an optimal layout scheme of the inclinometer, confirms that the bridge deflection which is calculated by maturing the bridge section inclination is feasible. Comparing the measurement results with the percentage meter, the method can meet the engineering requirements with an error percentage less than 5%. Combining with indoor model beam experiment has further studied the method of demarcating the inclinometer sensitivity, as well as the influence to inclinometer sensitivity by turning the inclinometer. Finally, combining with the bridge experiment has validated the reliability of this method.With a succinct interface and convenient operation, the program bases on matlab can calculate the deflection of simply supported beam and continuous beam at present. Without any static reference point, using the inclinometer to measure the deflection of bridge can reduce the dependence on environment, greatly enhance the measure efficiency .This method has very high practical value and application prospect in engineering.