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Guo E.-D.,China Earthquake Administration | Zhao Z.,China Earthquake Administration | Wang Z.-R.,China Earthquake Administration | Liu Z.,China Earthquake Administration | And 2 more authors.
Beijing Gongye Daxue Xuebao/Journal of Beijing University of Technology

To estimate seismic damage of highway beam bridges quickly and accurately, influence factors of the seismic damage were more reasonably reselected in an improved methodology based on Zhu Mei-zhen's empirical methodology. The least squares method was used to analyze the data of partial bridges in Tangshan earthquake and Wenchuan earthquake. The improved methodology was formed with new regression coefficients of the influence factors. The main difference between the improved and original methodologies is that site classification and seismic intensity are considered together to take place of the influence factor of liquefaction and instability of side slope that are taken into account in original methodology. By using both the improved and original methodologies, some highway beam bridges in Wenchuan earthquake were estimated. Results show that compared with the real seismic damages, the improved model is preliminarily validated to be more accurate. Source

Wang Y.,Survey Design and Research Institute of the Heilongjiang Water Utilities | Guo E.,China Earthquake Administration | Gao L.,China Earthquake Administration
Journal of Natural Disasters

Flood disasters occur frequently in the Nenjiang River in the history, especially the floods in 1998 and 2013, which severely affected the economic development of both sides along the Nenjiang River. This paper summarized and analyzed the disaster characteristics of the Nenjiang River flood in 2013 and the disaster causes. Because the Nenjiang River flood lasted for a long time and recessed slowly, and the construction material of the dikes is mainly sand, in order to ensure the dikes to safely pass the flood period and protect people's lives and properties in the future, effective measures must be taken to strengthen the dikes. Based on the dike design experience accumulated in many years, some effective measures for danger elimination and strengthening of dike project are proposed herein. Source

Zhang L.-N.,China Earthquake Administration | Guo E.-D.,China Earthquake Administration | Wang Y.,Survey Design and Research Institute of the Heilongjiang Water Utilities | Wang Q.,China Earthquake Administration | And 2 more authors.
Journal of Natural Disasters

In order to carry out quick and accurate assessment to the damage state of the earth dam project suffered from earthquake, based on earth dam earthquake damage estimation model and with application of VB platform, the earth dam earthquake damage assessment system were developed, the overall design and pattern of system development were introduced, key technologies such as the link of VB with Excel and input of Excel/Access data during system development were elaborated. Source

Guo E.-D.,China Earthquake Administration | Zhang L.-N.,China Earthquake Administration | Wang Y.-D.,Survey Design and Research Institute of the Heilongjiang Water Utilities | Wang Z.-R.,China Earthquake Administration | Wang Q.,China Earthquake Administration
Yantu Lixue/Rock and Soil Mechanics

In order to evaluate earthquake damage to earth dams quickly and accurately, more rational influence factors of the damage are chosen based on the empirical model. The least square method is used to re-analyze the earthquake damage data of earth dams. The regression coefficients of the influence factors of earthquake damage under different conditions are presented; and an improved empirical model to evaluate the earthquake damage to earth dams is set up. In the new model, irrational influence factors are eliminated; and the prediction accuracy of the regression model is improved with the correlation coefficient of 0.908 and the standard deviation of 0.459, which are better than the original model. By using both the improved and original model, 47 earth dams damaged in Wenchuan Earthquake are evaluated. The results are analyzed by comparing with the real seismic damages, preliminarily proving the improved model to be more satisfying. Source

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