Abstract
The types of Dynamic loads that might face an engineer during any design procedure vary. One of these loads is the explosion's pressure on buildings which is in other words the blast load. This research has examined the possibility of using a finite element method as a tool for predicting the dynamic response of blast loaded reinforced concrete beams. In this study, the advanced software, ABAQUS is used in order to model materials and consider the material nonlinearity, stiffness degradation and strain rate effects. Experimental results for several beams under explosion are chosen to be modeled and verified using ABAQUS. These experiments were carried out at the National University of Defense Technology in China. The results show that the material properties of concrete under impact loads (high strain rates) can be well defined in ABAQUS. Also the built in model CONWEP for blast load in ABAQUS can be used in the simulation process with an acceptable error.
Highlights
Many types of concrete structures may be subjected to blast and shock waves due to different types of blast loading
2 Aim and Objectives The aim of the research was to model the behavior of a Reinforced Concrete Beam under blast loading using ABAQUS
The specific objectives were to: 1- Model the material property under under high strain rate load. 2- Model the blast load using "CONWEP" Built-in model in ABAQUS and check the validity and accuracy of this model. 3- Show the effect of strain rate on the responses of reinforced concrete beams
Summary
Many types of concrete structures may be subjected to blast and shock waves due to different types of blast loading. After World War one and two, people started to understand the importance of protecting buildings from blast effect in order to save human lives, and this presented a particular challenge to design Nowadays this domain became one of most important when designing structures to resist impact loading or explosion in many parts of the world including the Middle East. For concrete structures and since the shock impedance of concrete is much higher than the shock impedance of air, the reflected blast wave from the interface of the two mediums will be magnified and reversible in direction (expansion wave "T") The elastic modulus of steel won't be affected
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