大应变下干燥橡胶砂动力特性试验研究

doi:10.13722/j.cnki.jrme.2016.0193

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Abstract Rubber sand mixture(RSM) has been recognized useful widely in civil engineering as low cost material for energy absorbing and isolating，while little research has been done on dynamic shear modulus and damping ratio of it in large strains. Cyclic simple shear tests on dry RSM with seven rubber content and four vertical consolidation pressure are introduced in this paper，and general rules on dynamic shear modulus and damping ratio of RSM at large strain range 10－3–10－1 are introduced. Results on RSM dynamics properties at large strain indicate that：(1) Dynamic shear modulus of RSM decays relative to that of pure sand，and the decay coefficient decrease with the increase of rubber content as well as with the increase of shear strain amplitude. (2) Damping ratio of RSM is amplified comparing with that of pure sand，the amplification coefficient increases with rubber content while decreases with shear strain amplitude. (3) Vertical consolidation pressure affects little on shear modulus decay coefficient of RSM to pure sand versus rubber content，while influences significantly damping ratio amplification coefficient of RSM to pure sand versus rubber content，that is damping ratio amplification coefficient increases with vertical consolidation pressure. With the increase of shear strain amplitude，influence of vertical consolidation pressure on damping amplification attenuates. (4) Both dynamic shear modulus and damping ratio are influenced obviously by shear cycle numbers，and it seems that the effect decreases with rubber content.

Key words： soil mechanics rubber sand mixture(RSM) dynamic shear modulus damping ratio large strains cyclic simple shear tests

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	Articles by authors
	LIU Fangcheng1
	YANG Jun2
	WANG Haidong3

Cite this article:

LIU Fangcheng1,YANG Jun2,WANG Haidong3. Experimental study on dynamic characteristics of dry rubber-sand mixture at large strains[J]. , 2016, 35(S2): 4265-4278.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0193 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/4265

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