Structure Response Under Blast Wave Load

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F15%3A00234002" target="_blank" >RIV/68407700:21610/15:00234002 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Structure Response Under Blast Wave Load

Popis výsledku v původním jazyce

The paper follows from the theory of explosion and interaction of an impact wave formed by the explosion and a structure. This is a complex mechanism depending on the geometry and composition of the structure, the magnitude and the angle of the blast wave, and relative distance of the blast. Firstly, the paper determines the parameters of the blast wave excited by a small charge explosion. The empirical formulas on the basis of our own experimental results are shown and used for the structure analysis. Evaluations of structures loaded by an explosion based on dynamic response in rotations round the central line of plate or beam systems during the dynamic load of this type is in the paper discussed and comparison of own limit values and published ones is presented. Blast loads typically produce very high strain rates in the range of 10-2 to10-4 s-1. This high straining rate would significantly increase the stress and strain capacities of concrete and steel reinforcement, and accordingly affects the dynamic performance of the target structure. The effect of strain rate for concrete material is discussed. The formulas for increased compressive strength of concrete and steel reinforcement are presented. The ductility of structural members is influenced by the corresponding values under high strain rate of reinforcement. Damage to the structure is assessed accordingly, firstly by the angle of rotation of the middle axis/surface, and secondly by the limit internal forces of the selected structure. The extreme nature of blast resistance makes it necessary to accept that structural members have some degree of inelastic response in most cases. This enables the application of structure dissipation using the ductility factor and increased of concrete strength. The limits are correlated with qualitative damage expectations. The methodology of dynamic response assessment and its application to the simple bridge structure is discussed.

Název v anglickém jazyce

Structure Response Under Blast Wave Load

Popis výsledku anglicky

The paper follows from the theory of explosion and interaction of an impact wave formed by the explosion and a structure. This is a complex mechanism depending on the geometry and composition of the structure, the magnitude and the angle of the blast wave, and relative distance of the blast. Firstly, the paper determines the parameters of the blast wave excited by a small charge explosion. The empirical formulas on the basis of our own experimental results are shown and used for the structure analysis. Evaluations of structures loaded by an explosion based on dynamic response in rotations round the central line of plate or beam systems during the dynamic load of this type is in the paper discussed and comparison of own limit values and published ones is presented. Blast loads typically produce very high strain rates in the range of 10-2 to10-4 s-1. This high straining rate would significantly increase the stress and strain capacities of concrete and steel reinforcement, and accordingly affects the dynamic performance of the target structure. The effect of strain rate for concrete material is discussed. The formulas for increased compressive strength of concrete and steel reinforcement are presented. The ductility of structural members is influenced by the corresponding values under high strain rate of reinforcement. Damage to the structure is assessed accordingly, firstly by the angle of rotation of the middle axis/surface, and secondly by the limit internal forces of the selected structure. The extreme nature of blast resistance makes it necessary to accept that structural members have some degree of inelastic response in most cases. This enables the application of structure dissipation using the ductility factor and increased of concrete strength. The limits are correlated with qualitative damage expectations. The methodology of dynamic response assessment and its application to the simple bridge structure is discussed.

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

—

Projekt

<a href="/cs/project/VG20122015089" target="_blank" >VG20122015089: Hodnocení bezpečnosti a rizik dopravních staveb při mimořádném zatížení</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering

ISBN

978-960-99994-7-2

ISSN

—

e-ISSN

—

Počet stran výsledku

11

Strana od-do

-1

Název nakladatele

ECCOMAS

Místo vydání

Madrid

Místo konání akce

Crete

Datum konání akce

25. 5. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—