Study on the obtaining method of material elastic modulus value in the similitude law design of structural shaking table test

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (3) : 114-120.

LIU Hongbiao1, 2, LI Hongnan1

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Abstract

In order to improve the accuracy of shaking table test, the calculation methods of model material elastic modulus in similitude law design of concrete structure, masonry structure and steel structure are studied based on the mechanical testing of model materials commonly used in the laboratory and the analysis of calculation method provided by specification. Then the reasonable obtaining methods of elastic modulus of model materials are proposed for the similitude law design of shaking table test of concrete, masonry and steel structure. The material test results and the analysis show that the test value of model material elastic modulus may have great difference with that of prototype materials. As a result, the elastic modulus ratio in the similitude law is too little, which will make the shaking table test results distorting. Therefore, when the shaking table test model of concrete structure is made by the microconcrete or mortar, the material elastic modulus of model and prototype should be obtained by the uniform formula provided by the concrete structure specification based on the cube compressive strength of materials. When the shaking table test model of masonry structure is made by small concrete hollow block, the elastic modulus of model materials should be calculated with the method provided by masonry structure specification based on the compressive strength obtained by the material test. The elastic modulus ratio in the similitude law of steel structure shaking table test can be set to 1.0. The conclusions above can provide basis for designing the similitude law of shaking table test of different structures.

Key words

shaking table test / elastic modulus / design of similitude law / concrete structure / masonry structure

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LIU Hongbiao1, 2, LI Hongnan1. Study on the obtaining method of material elastic modulus value in the similitude law design of structural shaking table test[J]. Journal of Vibration and Shock, 2016, 35(3): 114-120

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