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（四川大學(xué)建筑與環(huán)境學(xué)院， 成都 610065）
［摘要］探究了橋梁在爆炸荷載下的動態(tài)響應(yīng)以及模擬爆炸荷載下橋梁的損毀過程，選用了ANSYS軟件建立橋梁、空氣以及炸藥模型，利用了通用顯示動力分析程序LS-DYNA進(jìn)行顯示求解。分析了在爆炸過程中沖擊波的傳播規(guī)律,得到了關(guān)鍵橋梁單元的位移響應(yīng),模擬了全橋坍塌的損毀過程,探究了不同爆炸距離以及不同炸藥量對橋梁動態(tài)響應(yīng)的影響,并通過Tuler-Butcher損傷模型計算出了特定單元的損傷累計曲線。
［關(guān)鍵詞］橋梁； 爆炸； 動態(tài)響應(yīng)； 損傷累計； 坍塌模擬
中圖分類號： TU997 文獻(xiàn)標(biāo)識碼： A 文章編號： 1002-848X(2015)S2-0523-05
Numerical simulation of dynamic response and collapse of bridge under blast loading
Zhao Yi, Chen Huayan, Song Zulan, Zeng Xiangguo
(College of Architecture and Environmental, Sichuan University, Chengdu 610065, China)
Abstract: The dynamic response of bridge was explored and the damage process of bridge under explosion was simulated. ANSYS and the explicit dynamic analysis program LS-DYNA were chosen to build and compute the bridge, air and explosive models. Also, the characteristics of shock wave propagation were analyzed, and the displacement response of some specified elements was obtained. Besides, the failure and collapse process of the bridge was simulated, and then the influence caused by different explosion distances and different explosive quantities on dynamic response of the bridge was analyzed. Finally, according to the Tuler-Butcher damage rule, the damage accumulation curves of specified elements were obtained.
Keywords： bridge； blasting； dynamic response； damage accumulation； collapse simulation* 2014年四川大學(xué)大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計劃校級重點(diǎn)項目（20140139）。
作者簡介：趙羿，本科，Email：371815604@qq.com。
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