【摘要】：橋梁在國(guó)民經(jīng)濟(jì)生活中占據(jù)著十分重要的地位,一旦遭受恐怖襲擊或者意外爆炸,不僅會(huì)導(dǎo)致橋梁破壞甚至倒塌,還可能造成附近的人員傷亡和經(jīng)濟(jì)財(cái)產(chǎn)損失。然而現(xiàn)行國(guó)內(nèi)設(shè)計(jì)規(guī)范中對(duì)于結(jié)構(gòu)抗爆設(shè)計(jì)的要求尚欠缺,這就造成了現(xiàn)有的橋梁抗爆能力極為薄弱,一旦遭到恐怖襲擊或意外爆炸,則會(huì)造成不堪設(shè)想的后果。因此開(kāi)展爆炸荷載作用下混凝土橋梁結(jié)構(gòu)的響應(yīng)問(wèn)題以及損傷效應(yīng)的相關(guān)基礎(chǔ)和應(yīng)用研究,找到更加合理的設(shè)計(jì)理論和方法,使橋梁結(jié)構(gòu)能有效抵御爆炸荷載的作用是非常必要的。本文以河南省義昌大橋爆竹爆炸的事故為背景,主要內(nèi)容包括以下幾個(gè)方面:1.分析國(guó)內(nèi)外的研究現(xiàn)狀,通過(guò)對(duì)爆炸的基本理論研究,研究混凝土橋梁在爆炸荷載下的損傷機(jī)理,明確橋梁結(jié)構(gòu)的爆炸分析方法。2.通過(guò)ANSYS軟件建立簡(jiǎn)支T梁數(shù)值模擬模型,研究爆炸荷載作用下鋼筋混凝土梁的動(dòng)力響應(yīng)和破壞模式。通過(guò)改變比例距離、TNT當(dāng)量、TNT相對(duì)于梁的位置等參數(shù),數(shù)值模擬簡(jiǎn)支T梁的梁體爆炸,分析鋼筋混凝土簡(jiǎn)支T梁的抗爆性能。指出改變參數(shù)會(huì)導(dǎo)致鋼筋混凝土梁的破壞程度不同。3.通過(guò)ANSYS軟件建立簡(jiǎn)支T梁橋數(shù)值模擬模型,通過(guò)改變TNT相對(duì)于梁的位置等參數(shù),模擬簡(jiǎn)支T梁橋的爆炸,分析鋼筋混凝土簡(jiǎn)支T梁橋的抗爆性能。指出TNT相對(duì)于橋的位置改變會(huì)影響鋼筋混凝土梁橋的破壞程度。4.通過(guò)ANSYS軟件建立簡(jiǎn)支T梁橋數(shù)值模擬模型,對(duì)在特定位置的簡(jiǎn)支T梁橋的易損性進(jìn)行了分析,給出了易損性標(biāo)準(zhǔn)及易損性曲線。
[Abstract]:Bridges play a very important role in the national economic life. Once they are attacked by terrorists or accidentally exploded, they will not only lead to the destruction or collapse of bridges, but also may cause casualties and economic property losses in the vicinity. However, the requirement of structural anti-explosion design in the current domestic design code is still lacking, which leads to the extremely weak anti-explosion capability of existing bridges. Once the bridge is attacked or accidentally exploded, it will result in unimaginable consequences. Therefore, the response problem of concrete bridge structure under explosive load and the related foundation and application of damage effect are studied to find more reasonable design theory and method. It is necessary to make bridge structure resist explosion load effectively. This paper takes the explosion accident of Yichang Bridge in Henan Province as the background. The main contents include the following aspects: 1. This paper analyzes the present research situation at home and abroad, studies the damage mechanism of concrete bridge under explosion load, and clarifies the explosion analysis method of bridge structure by studying the basic theory of explosion. The numerical simulation model of simply supported T-beam is established by ANSYS software, and the dynamic response and failure mode of reinforced concrete beam under explosive load are studied. By changing the ratio distance, TNT equivalent and the position of TNT relative to the beam, the explosion of simply supported T-beam is simulated numerically, and the anti-explosion performance of reinforced concrete simply supported T-beam is analyzed. It is pointed out that the failure degree of reinforced concrete beams will be different by changing the parameters. The numerical simulation model of simply supported T-beam bridge is established by ANSYS software. The explosion of simply supported T-beam bridge is simulated by changing the position of TNT relative to the beam, and the anti-explosion performance of reinforced concrete simply supported T-beam bridge is analyzed. It is pointed out that the change of the position of TNT relative to the bridge will affect the damage degree of reinforced concrete beam bridge. 4. The numerical simulation model of simply supported T-beam bridge is established by ANSYS software. The vulnerability of simply supported T-beam bridge in a special position is analyzed, and the vulnerability criterion and curve are given.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U447

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 劉山洪,魏建東,錢(qián)永久;橋梁結(jié)構(gòu)爆炸分析特點(diǎn)綜述[J];重慶交通學(xué)院學(xué)報(bào);2005年03期

，

本文編號(hào)：2370428