检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Bo-Ya, Feng Qing-Yong, Xia Zhu, Xun-Guo Key Laboratory of disaster prediction & control of complex structure system Dalian University Dalian116622 China College of architectural engineering Dalian University Dalian116622 China

In order to study the influence of chlorine salt erosion on the bending performance of graphite tailings concrete beams, the bending performance tests of graphite tailings concrete beams with different substitution rates (0, 10%, 20%, 30%, 40%) in air, water and chlorine salt environments were carried out. The failure mode, crack development law, ultimate bearing capacity, mid-span deflection change law and concrete and steel strain of the test beams under three environments were mainly analyzed. The results show that the cracking load and ultimate load of graphite tailings concrete beams decrease after chlorine salt erosion. With the increase of the replacement rate of graphite tailings, the characteristic load of the test beam increases first and then decreases. The characteristic load of the test beam is the highest when the replacement rate is 20%. The bending performance of low-volume graphite tailings concrete beams is better than that of ordinary concrete beams after chlorine salt erosion. Deflection growth of test beams with replacement ratios of 10% and 20% is relatively slow. Graphite tailings concrete beams still conform to plane section assumption after chloride attack. Based on the test results, a formula for calculating the ultimate bearing capacity of concrete beams with different graphite tailings replacement ratios after chlorine salt erosion was established. © 2022, The Authors. All rights reserved.

关键词： Graphite

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Risk Assessment of Geological Hazards in the Dahe Mountain Area Based on AHP

Risk Assessment of Geological Hazards in the Dahe Mountain A...

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2018 4th International Conference on Green Materials and Environmental Engineering(GMEE 2018)

作者： Xun-guo ZHU Yan REN College of architectural engineering Dalian University Key Laboratory of disaster prediction and control of complex structure system Dalian University

In order to evaluate the geological disasters in the DaHe Mountain area, In view of the geological environment and the development characteristics of rock strata in DaHe Mountain area of Dalian, six influencing factors have been selected as the study evaluation index which such as stratigraphic lithology（a）, slope structural type（a）, slope gradient（a）, slope height（a）, rainfall（a） and structural plane（a）. The weight of evaluation factors is determined by AHP method, and the risk assessment model of geological hazards is established in the study area. On this basis, the risk of geological hazards in the study area is preliminarily divided and calculated according to the established evaluation model. The risk magnitude of geological hazards in different regions of Dahe Mountain is obtained. Moreover, the research findings can provide certain reference for the government's risk prevention and control.

关键词： AHP method Geological hazard Risk assessment Evaluation model

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