دانلود کتاب نوآوری در حفاظت از ضربه و انفجار

For recent decades, the extreme events or threats on buildings and infrastructures related to impact and blast loads have shown an increasing tread, which results in severe damage or even collapse of the structures. Hence, there is an urgent need to improve their resistances against impact and blast loads. Generally, the impact and blast protections can be categorized into two groups, including “soft” and “stiff” protections. “Soft” protection refers to the use of “soft” materials (e.g., foam) or structures (e.g., thin-walled tube) to dissipate impact and blast energy through plastic deformation. “Stiff” protection refers to the utilization of structures with high resistance and ductility to directly resist potential impact and blast loads. More recently, the combination of “soft” and “stiff” protection is more appealing in terms of lightweight, high energy absorption capacity, failure mode regulating, etc.
This book aims to present some new protective methods from three aspects, including “soft” protection, “stiff” protection, and the combination of the two. In the first part of this book, the aluminum foam-and polyurethane foam-filled struc-tures have been developed for dissipating impact and blast energy. Experimental and numerical studies have been conducted to obtain their behaviors under impact loading. Moreover, analytical models have been proposed to assess their energy absorption performances and facilitate the impact and blast-resistant design when using the proposed foam-filled structures as energy absorbers. In the second part of this book, Steel-Concrete-Steel (SCS) sandwich structures with novel shear connec-tors have been developed, and their behaviors under impact and blast loads have been experimentally, numerically, and analytically studied. The analytical models for predicting the impact and blast responses of SCS sandwich structures have been developed. In the third part of this book, a new Steel-Polyurethane Foam-Steel-Concrete-Steel (SPUFSCS) panel (i.e., the combination of “soft” and “stiff” protec-tion) has been developed to achieve a higher impact-resistant performance. Owing to the increasing impact and blast threats on buildings and infrastructures, the studies presented in this book are of significance for providing new solutions for impact and blast enhancements. The main contents of this book are as follows:
Chapter 1: Two types of novel aluminum foam-filled energy absorption connec-tors are presented, and their energy absorption performances under impact load are presented to predict force–displacement of the aluminum foam-filled energy absorp-tion connectors. A design method is presented for conducting the blast-resistant design of the structures employing the proposed energy absorption connectors as additional energy absorbers.
Chapter 2: Two types of Polyurethane (PU) foam-filled energy absorption connec-tors are developed, and their energy absorption performances are experimentally and numerically examined. Moreover, the analytical models for predicting the force–displacement responses of PU foam-filled energy absorption connectors are presented, and the transient strain rate effects of both steel and PU foam are incorporated into the analytical models.
Chapter 3: A novel Aluminum Foam-Filled Circular-Triangular Nested Tube (AFCTNT) energy absorber is presented to resist impact load, and its energy absorption performance, force–displacement response, and deformation mode are experimentally and numerically examined.