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Failure modes of reinforced concrete columns of buildings under debris flow impact
Zeng, Chao1,2; Cui, Peng1; Su, Zhiman1; Lei, Yu1,2; Chen, Rong1,2
Corresponding AuthorCui, Peng
Source PublicationLANDSLIDES
AbstractBuildings are the element of greatest concern with regard to debris flow hazard risk, and their destruction is mainly caused by the collapse of walls and reinforced concrete (RC) columns. This research classifies the failure modes of the columns in a typical beam-column-framed building based on field investigations and historical data. It also proposes the collapse mechanism for columns damaged by debris flow, with reference to their failure modes. Based on the collapse mechanism, three typical types of RC columns with different strengths, which are usually used in many mountainous areas of Western China, were selected for the damage analysis. The critical velocity of debris flow and the diameter of particles were obtained using theories of material and structural mechanics. The results showed that the critical bearing condition of columns can be indicated by the formation of plastic hinges along columns and by the shear damage in the column section. The development of plastic hinges was mainly determined by the debris flow velocity and diameter and the impact location of large boulders. The energy of viscous debris flow is much larger than that of the dilute flow, and there will be more severe damage for columns under viscous flow impact. The critical velocities for three plastic hinge collapses are about twice those of two plastic hinge collapses. If the diameter of the boulders is larger than 0.5 m, the impact force of the large boulders plays a major role in the column collapse. Otherwise, both the dynamic pressure of debris flow and the impact force of boulders are responsible for column failure. Finally, the critical condition of column failure was applied to Zhouqu's debris flow hazard. The calculated critical velocity is consistent with the value given by field investigation, which implies that this study can be used for risk analysis and damage estimation in a debris-flow-prone area.
KeywordStructures Reinforced Concrete Columns Debris Flow Impact Pressure Large Boulder Impact Force Critical Condition
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS Subject ExtendedEngineering ; Geology
Indexed BySCI
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000355341400011
Funding OrganizationChinese Academy of Sciences(KZZD-EW-05-01) ; National Natural Science Foundation of China(41030742)
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zeng, Chao,Cui, Peng,Su, Zhiman,et al. Failure modes of reinforced concrete columns of buildings under debris flow impact[J]. LANDSLIDES,2015,12(3):561-571.
APA Zeng, Chao,Cui, Peng,Su, Zhiman,Lei, Yu,&Chen, Rong.(2015).Failure modes of reinforced concrete columns of buildings under debris flow impact.LANDSLIDES,12(3),561-571.
MLA Zeng, Chao,et al."Failure modes of reinforced concrete columns of buildings under debris flow impact".LANDSLIDES 12.3(2015):561-571.
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