Test Research And Analysis On Seismic Behavior Of Large-scale Aqueduct

As an overhead building which conveying channel water across the river, roadand valley, The aqueduct is one of the most widely used cross building in hydraulicstructures, and has a long history in China. With the start of China’s South-to-NorthWater Transfer Project, a large number of large-scale aqueducts emerge. The mainwork of this paper is to study the seismic performance of large-scale aqueduct. Themain results can be summarized as follows.1、This paper presented a new method of making the test pile used in testing onpile which bearing horizontal force. And used this method, a test pile wasmanufactured. By the way of horizontal static load testing on the single pile, thefeasibility of obtaining the data of pile such as moment, soil pressure anddeformation was verified by the strain gauges and soil pressure gauges whichembedded in the steel pipe pile. Additionally, the related parameters of the soil in thelaboratory soil tank were obtained.2、In this paper, a low cyclic loading test on the performance of pot rubberbearing which will be used in the pseudo-dynamic test of aqueduct was carried out,The test obtained the force-displacement hysteretic curves and the horizontal stiffnessof the antiseismic pot rubber bearing under four kinds of different conditions.3、Based on the Housner mass-spring model and PCM-Newmark method, thispaper established the pseudo-dynamic test method which can comprehensivelyconsider the pile-soil-structure-water interaction of the aqueduct structure, and usedANSYS to simulate the test process. With the comparison of the result of the modelaqueduct and the prototype aqueduct, the results show that: Using this method ofpseudo-dynamic test to research the aqueduct structure can reflect real seismicresponse of aqueduct structure and the method is reasonable and feasible.4、 In this paper, pseudo-dynamic tests to the transverse and longitudinaldirection of a model aqueduct were carried out. the pile foundation of the model wasdirectly placed in the soil of the soil tank.The fluid-solid coupling effect of the uppertank was simulated by Housner spring-mass model, and treated as the numericallyoperated part. The displacement time-history and shear force-displacement hystereticcurves of the test substructure and calculation substructure in condition of water andanhydrous under different peak of ground acceleration of different seismic waves were obtained.In addition, tests obtained the distribution rule of bending moment,displacement and soil pressure of the pile. Test results show that, under the action ofseismic waves, the structure’s response is related to the spectral characteristics of theground acceleration and the role of of the fluid-solid coupling effect may increase orreduce the structure response.5、 This paper used ANSYS to calculate and analyse the test model. Thecalculational results were compared with the experimental results. In addition, thispaper also respectively calculated two cases that the test model with or withoutbearings, when considerate the pile-soil-structure-water dynamic interaction. Theresults show that: the seismic pot rubber bearing has a certain shock absorption.