|
|
|
| DYNAMIC BEHAVIOR AND CONSTITUTIVE MODEL OF STYROPOR CONCRETE UNDER IMPACT LOADING |
HuZebin1; XuJinyu1,2; XiFeng1; DingGuobo1
|
| 1.The Engineering Institute ,Air Force Engineering University,Xi’an710038,China;2.Northwest China University of Technology,Xi’an710072,China |
|
|
|
Abstract Mechanical behavior of Styropor concrete（EPSC） added with various volumetric fractions of EPS subjected to high strain rates were studied by using the Large-Diameter-SHPB. The infection of volumetric fractions and average strain rate to dynamic properties of EPSC were investigated. A nonlinear viscoelastic constitutive model for EPSC was established with experimental data. The experimental results show that under high strain rate condition, the dynamic strength and limit strain of EPSC are strain rate dependent, the strain rate effect can be expressed by linear approximations. With the addition of volumetric fractions of EPS, the impact compressive strength and elastic modulus of EPSC declines, and the toughness of EPSC is reinforced. Comparison of model output with experimental data indicates that this nonlinear viscoelastic constitutive model is able to describe high-strain-rate mechanical behavior of EPSC reasonably.
|
|
Received: 05 May 2010
|
|
|
|
|
|
|
2011, Vol. 30 
