The damages of building structures subjected to multifarious explosions cause huge losses of lives and property. It is the reason why the blast resistance and explosion protection of building structures become an impo...The damages of building structures subjected to multifarious explosions cause huge losses of lives and property. It is the reason why the blast resistance and explosion protection of building structures become an important research topic in the civil engineering field all over the world. This paper provides an overview of the research work in China on blast loads effect on building structures. It includes modeling blast shock wave propagation and their effects, the dynamic responses of various building structures under blast loads and the measures to strengthen the building structures against blast loads. The paper also discusses the achievements and further work that needs be done for a better understanding of the blast loads' effects on building structures, and for deriving effective and economic techniques to design new or to strengthen existing structures.展开更多
Rational rock-explosive matching is of great importance to enhancing explosive energy effective utilization and improving rock fragmentation effect.The traditionally emphasized method of acoustic impedance matching is...Rational rock-explosive matching is of great importance to enhancing explosive energy effective utilization and improving rock fragmentation effect.The traditionally emphasized method of acoustic impedance matching is not rational.Based on blasting breakage mechanism,a new theory of rock-explosive matching in drilling and blasting is proposed.The new approach chooses explosive parameters by reasonable control of the size of crushed zone under the condition of fully fragmentation between adjacent blast holes.This method can directly reflect the blasting fragmentation effect and energy effective utilization,which is easy to implement.Also,a modified model is developed,taken adjacent blast hole blasting loading into account.As a result,explosive parameters of different grades of rock are given in full coupling on-site mixed explosive charge for different project objectives.展开更多
基金Supported by National Science Fund for Distinguished Young Scholars of China (No. 50425824)
文摘The damages of building structures subjected to multifarious explosions cause huge losses of lives and property. It is the reason why the blast resistance and explosion protection of building structures become an important research topic in the civil engineering field all over the world. This paper provides an overview of the research work in China on blast loads effect on building structures. It includes modeling blast shock wave propagation and their effects, the dynamic responses of various building structures under blast loads and the measures to strengthen the building structures against blast loads. The paper also discusses the achievements and further work that needs be done for a better understanding of the blast loads' effects on building structures, and for deriving effective and economic techniques to design new or to strengthen existing structures.
基金Foundation items： National Science Fund for Distinguished Young Scholars, China （No. 51125037） Natio- nal Basic Research Program of China （No. 2011CB013501） National Natural Science Foundation of China （No. 51279135）
文摘Rational rock-explosive matching is of great importance to enhancing explosive energy effective utilization and improving rock fragmentation effect.The traditionally emphasized method of acoustic impedance matching is not rational.Based on blasting breakage mechanism,a new theory of rock-explosive matching in drilling and blasting is proposed.The new approach chooses explosive parameters by reasonable control of the size of crushed zone under the condition of fully fragmentation between adjacent blast holes.This method can directly reflect the blasting fragmentation effect and energy effective utilization,which is easy to implement.Also,a modified model is developed,taken adjacent blast hole blasting loading into account.As a result,explosive parameters of different grades of rock are given in full coupling on-site mixed explosive charge for different project objectives.
