本文選題：煤礦開(kāi)采 + 地震作用　； 參考：《遼寧工程技術(shù)大學(xué)》2015年碩士論文

【摘要】：針對(duì)煤礦采動(dòng)區(qū)建筑物的地震損傷演化過(guò)程尚不明晰的問(wèn)題,考慮到煤礦采動(dòng)與地震聯(lián)合成災(zāi)機(jī)制的復(fù)雜性,基于損傷力學(xué)理論,采用地震工程學(xué)、開(kāi)采沉陷學(xué)以及結(jié)構(gòu)動(dòng)力學(xué)等相關(guān)理論,建立采動(dòng)區(qū)地震損害影響下的建筑物動(dòng)力損傷判據(jù),根據(jù)抗震設(shè)計(jì)規(guī)范選取兩組實(shí)際記錄地震波(唐山波、遷安波)以及一組人工地震波,建立ANSYS有限元模型,通過(guò)設(shè)定不同工況,分別通過(guò)數(shù)值計(jì)算分析建筑物在地震作用下的損傷以及在采動(dòng)地震聯(lián)合作用下的動(dòng)力響應(yīng)分析。根據(jù)煤礦采動(dòng)建筑物地震動(dòng)力破壞的損傷成災(zāi)機(jī)制,探討建筑物地震災(zāi)害作用以及采動(dòng)與地震聯(lián)合作用下的損傷致災(zāi)機(jī)理,通過(guò)對(duì)比分析表明：地震災(zāi)害作用下,由于選取的三組地震波的加強(qiáng)時(shí)長(zhǎng)的不同,其地震作用下建筑物結(jié)構(gòu)位移、速度、加速度時(shí)程曲線以及樓層位移、速度、彎矩等曲線都有很大的不同,頂層的位移、速度以及加速度峰值較其他樓層的變化更加明顯,容易發(fā)生突變,而根據(jù)樓層最大彎矩圖,建筑在某一樓層彎矩值存在突變,很有可能出現(xiàn)塑性鉸。建筑物承受的損傷與施加的地震波加強(qiáng)時(shí)長(zhǎng)有著直接的關(guān)系,加強(qiáng)時(shí)長(zhǎng)越長(zhǎng),建筑動(dòng)力響應(yīng)越明顯,建筑物損傷越大。在對(duì)地震災(zāi)害作用下建筑物損傷以及采動(dòng)地震聯(lián)合作用下建筑物損傷的對(duì)比分析可知,在采動(dòng)地震聯(lián)合作用下,建筑物的動(dòng)力響應(yīng)數(shù)值均遠(yuǎn)大于建筑物在只有地震作用時(shí)的各種動(dòng)力響應(yīng)的數(shù)值,也就是采動(dòng)作用對(duì)建筑在受到地震破壞時(shí)起到了一個(gè)放大作用。建筑物在地震作用下煤礦采動(dòng)對(duì)建筑物所產(chǎn)生的次生損傷不斷的發(fā)展,導(dǎo)致建筑物的薄弱層位置形成塑性鉸,嚴(yán)重削弱了建筑物的抗震性能,同時(shí)煤礦采動(dòng)也加劇了建筑的地震動(dòng)力響應(yīng),對(duì)與煤礦采動(dòng)建筑必須對(duì)煤礦開(kāi)采變形與地震荷載的成災(zāi)機(jī)理,以及二者的聯(lián)合作用成災(zāi)機(jī)制予以重視,開(kāi)展煤礦采動(dòng)建筑物抗開(kāi)采變形隔震保護(hù)體系相關(guān)的研究工作。
[Abstract]:In view of the unclear process of seismic damage evolution of buildings in mining area of coal mine, considering the complexity of combined mechanism of mining and earthquake, seismic engineering is adopted based on the theory of damage mechanics. Based on mining subsidence theory and structural dynamics theory, the dynamic damage criterion of buildings affected by earthquake damage in mining area is established. According to the seismic design code, two groups of actual seismic waves (Tangshan wave, Tangshan wave) are selected. The finite element model of ANSYS is established, and the damage of buildings under earthquake action and the dynamic response under combined action of mining earthquake are analyzed by numerical calculation under different working conditions. According to the mechanism of seismic dynamic damage of mining buildings in coal mines, the mechanism of damage and disaster caused by seismic disasters of buildings and the combined action of mining and earthquake is discussed. The results show that: under the action of earthquake disaster, Due to the difference of strengthening time between the three groups of seismic waves, the structural displacement, velocity, acceleration time history curve, floor displacement, velocity and bending moment curves are very different under the earthquake action, and the displacement of the top floor. The change of the velocity and acceleration peak is more obvious than that of the other floors, and it is easy to mutate. According to the maximum bending moment diagram of the floor, there is a sudden change in the moment value of the building on a certain floor, and the plastic hinge is likely to appear. The damage sustained by buildings is directly related to the strengthening time of applied seismic waves. The longer the strengthening time is, the more obvious the dynamic response of buildings is and the greater the damage of buildings is. By comparing and analyzing the damage of buildings under earthquake disaster and under the combined action of mining and earthquake, we can know that under the combined action of mining and earthquake, The dynamic response of buildings is much larger than that of buildings under only seismic action, that is, the action of taking action plays a magnifying role when the buildings are damaged by earthquakes. Under the action of earthquake, the secondary damage caused by the mining of coal mine on the building is developing continuously, which leads to the plastic hinge of the weak floor of the building, which seriously weakens the seismic performance of the building. At the same time, the mining of coal mine also intensifies the seismic dynamic response of the building. Therefore, the mechanism of deformation and seismic load in coal mining and the mechanism of the combined action of the two must be paid more attention to. To carry out the research work related to seismic isolation protection system of mining buildings against mining deformation.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU311.3

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