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2016,
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1147 1153. .123:
02582724(
2016)
06114707 DOI:
10. 3969 / j. issn. 02582724. 2016. 06. 014456789:;<=>?@ABCDEFG
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AElastoPlastic Dynamic Responses of
Reinforced Concrete Slabs under Rockfall Impact
WANG Dongpo,
LIU Yang,
PEI Xiangjun,
SHI Si(
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,
Chengdu University of Technology,
Chengdu 610059,
China)
Abstract:
The process of rockfall impact on reinforced concrete slabs is accompanied by complex energy transformation. The traditional engineering design,
which was based on experience or the Hertz contact law,
has great deviation with actuality. In order to develop an efficient and accurate calculation method of rockfall impact response,
we adopted dynamic equations proposed by Olsson for orthotropic composite plates under impact loads,
meanwhile compared the dynamic responses calculated according to the elastoplastic contact law,
the Hertz contact law and the dynamic finite element method. The results show that,
in the same conditions,
as the plastic deformations of slabs were considered in the Hertz solution,
its peak contact force was larger than the elastoplastic solution and dynamic finite element solution by 31. 8% and 77. 1% respectively. Moreover,
the maximum indentation derived from Hertz solution was increased by 17. 3% and 61. 8% than the elastoplastic solution and dynamic finite element solution,
respectively. The elastoplastic dynamic responses were closer to the dynamic finite element solutions than Hertz dynamic responses,
demonstrating that the proposed elastoplastic method is efficient and accurate without complicated modeling process. Key words:
rockfall;
impact;
reinforced concrete slab;
elasticplastic theory ]^KLßàáâãäIåæJçè égJqKL. ÅêëÞìíîïðíï,
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[
1]
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J]
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2015,
50(
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. Journal of Southwest Jiaotong University,
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e,
,
\. jayx®r]`^K LVW-gnDE[
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et al. Application of flexible shedtunnel structure to rockfall hazard prevention[
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. Journal of Southwest Jiaotong University,
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∥ ASTM Special Technical Publication.[
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American Society for Testing,
1977:
427440.[
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SAXENA R. Combined effects of shear deformation and permanent indentation on the impact response of elastic plates[
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. International Journal of Solids and Structures,
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OLSSON R. Impact response of orthotropic composite plates predicted from a oneparameter differential 2 5 1 17 ( 6 * +,-