Seismic dynamic centrifugal model test extension analysis method
A technique of centrifugal model test, epitaxial analysis method, applied in the field of test theory
Active Publication Date: 2014-04-16
NANJING HYDRAULIC RES INST
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Problems solved by technology
In the foreseeable future, it is unimaginable to build a centrifuge vibrating table with a table size of 15 meters, a centrifugal acceleration of 100g, a vibrating mass of 3000t, and a rotating mass of 30000t. Its research and development expenditure is more than 5 billion yuan, and it is almost impossible to build it.
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[0074] Implementation case——Seismic Safety Evaluation and Centrifugal Model Test of Seismic Measures of Changhe Dam.
[0075] like figure 1 , a hydropower station is a rockfill dam with sand and gravel core wall, the maximum dam height is 240m, the crest length is 497.94m, the crest width is 16.00m, and the bottom width is 500m. In theory, all centrifuge vibration tables in the world are unable to test and study its seismic performance. According to the test method invented by the applicant, the geometric scale of the model is selected as 1 / 750, and the gravity scale is 10, 20, 30, 40, so that the dynamic centrifugal model test of the dam can be carried out smoothly. The seismic acceleration response of the dam body, the dynamic stress of the cut-off wall and the residual deformation of the dam body after the earthquake were obtained through the test, and the effectiveness of various seismic reinforcement measures was tested. Among them, the maximum seismic residual deformat...
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The invention provides a seismic dynamic centrifugal model test extension analysis method which aims at researching a seismic destructive mechanism and the disaster prevention and decrease of large-scale projects such as a high earth-rock dam by using an unequal stress small-scale dynamic centrifugal model test. The technical thought is as follows: an equal stress scale test result is obtained by fitting extension through a method that model stress gradually approaches prototype stress by adopting n unequal stress small-scale dynamic centrifugal model tests. The seismic dynamic centrifugal model test extension analysis method provided by the invention can be used for simulating the large-scale project through a relatively small scale and applying the centrifugal machine vibration table to the effective test research of the seismic destructive mechanism and disaster preventing and decreasing measures of large-scale projects such as the high earth-rock dam, a scientific and feasible way is provided for the model test research of the problem of seism of the large-scale projects, which can not be originally carried out, and the reasonability of the effective test result of the seismic destructive mechanism and disaster preventing and decreasing measures of large-scale projects such as the high earth-rock dam can be obviously promoted.
Description
technical field [0001] The invention belongs to the technical field of test theory, and in particular relates to an extension analysis method for an earthquake dynamic centrifugal model test. It is especially suitable for the experimental research on the earthquake damage mechanism of high earth-rock dams and the effectiveness of earthquake disaster prevention and mitigation measures. Model tests can be applied to the study of earthquake disaster prevention and mitigation in large-scale projects. Background technique [0002] my country has more than 98,000 reservoir dams, among which there are more than 100 100m high earth-rock dams. With the development and utilization of water resources and the progress of the western development process, a number of 100m-level or even 200-300m high earth-rock dams are under construction or Construction is about to start, and most of these high dams are located in high seismic intensity areas. Once an earthquake occurs or even crashes, th...
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Inventor 章为民王年香陈生水徐光明顾行文曾友金任国峰傅华
Owner NANJING HYDRAULIC RES INST