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Research on Damage Characteristics of Concrete Bridge Subjected to Blast Loading

Author: ZhangKaiJin
Tutor: HuangPingMingï¼›WangDi
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: Blast Concrete Bridges Transient analysis Dynamic Response Damage characteristics
CLC: U441.4
Type: Master's thesis
Year: 2009
Downloads: 173
Quote: 3
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Abstract


Currently, the the bridge explosion caused by accident continue to increase, such an incident has caused structural damage and casualties seriously affect the safe use of the roads and bridges . Therefore, it is increasingly important to ensure that the bridge structure under blast loading Safety Day . However , at this stage under blast loading bridges are almost empty, can not meet the needs of bridge construction and maintenance . In order to establish a more rational design theory and methods , the bridge structure can effectively resist blast loading , to carry out basic and applied research , in-depth understanding of the response of the concrete bridge structures under blast loading and damage effects is necessary . This article is based on the basic theory of the explosion , the damage mechanism of concrete bridge under blast loading . Grasp the explosion of the bridge structure analysis method to establish the reasonable finite element model , the blast impulse load a triangle pressure load to a certain range of the deck , and taking into account the strain rate effect of concrete materials , using ANSYS instantaneous state analysis module of the dynamic response of concrete bridge under blast loading , while concrete bridge overall structure damage effect . Loading position by changing the load , load size, loading rate and strength grade of concrete , structural damage effect and damage factors to the analysis, the degree of influence of each parameter on the effects of structural damage and laws . Paper research results provide a theoretical basis for antiknock design of the bridge structure and the comprehensive protection and support .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge strength and fatigue damage
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