斜入射地震波作用下綜合管廊的動力響應(yīng)
發(fā)布時間：2019-01-17 08:07
【摘要】：地下綜合管廊是一種典型的淺埋地下結(jié)構(gòu),相比于傳統(tǒng)的直埋管線解決了很多城市化建設(shè)進程中的難題,創(chuàng)造了良好的地下空間利用和統(tǒng)一化管理平臺�，F(xiàn)階段我國大力支持發(fā)展建設(shè)地下綜合管廊,多個城市現(xiàn)在已經(jīng)建成,這也是實現(xiàn)未來創(chuàng)造海綿城市的希望。但是,我國現(xiàn)有的規(guī)范對抗震設(shè)計方面幾乎空白,設(shè)計過程中對管廊的研究多為借鑒隧道、地鐵等地下結(jié)構(gòu)的抗震設(shè)計,這些地下結(jié)構(gòu)與綜合管廊抗震有一定的不同,不能為經(jīng)濟和安全同時實現(xiàn)帶來可靠的參考。因此,本文在已有的試驗和理論基礎(chǔ)上,運用有限元分析軟件研究了其抗震性能。通過對某實際工程中的地下綜合管廊做數(shù)值模擬研究,在斜入射地震動輸入條件下,觀測地下綜合管廊、周圍土體以及內(nèi)部管線的動力響應(yīng)規(guī)律,總結(jié)概括其破壞方式并給出現(xiàn)象產(chǎn)生的解釋,最后據(jù)此給出對于抗震設(shè)計的建議。本文的主要內(nèi)容如下:第一,針對地下綜合管廊發(fā)展現(xiàn)狀、斜入射地震動輸入實現(xiàn)和土結(jié)相互作用等幾個方面進行系統(tǒng)的整理并闡述了相關(guān)理論。隨后基于一致粘彈性人工邊界的建立,推導(dǎo)了等效荷載計算公式。實現(xiàn)在人工邊界上的等效荷載求解,并利用MATLAB編程實現(xiàn)多個面上不同節(jié)點的等效荷載輸入,用模型驗證了地震動荷載的輸入和邊界條件的合理性和準確度。第二,選取某實際工程中的綜合管廊為研究對象,選定混凝土的本構(gòu)分析模型與塑性損傷參數(shù),在有限元軟件ABAQUS中實現(xiàn)模型的斜入射地震動輸入,分析地下綜合管廊在動力作用下的響應(yīng)規(guī)律,分別探討了土體、綜合管廊體與內(nèi)置管線在動荷載作用下的響應(yīng)規(guī)律和破壞準則。第三,逐個的分析了可能對地下綜合管廊的動力響應(yīng)規(guī)律產(chǎn)生重要影響的因素,分別選取土體介質(zhì)參數(shù)、輸入不同的地震動幅值以及綜合管廊埋深變化等因素進行了研究,分析數(shù)值計算結(jié)果中的監(jiān)測點的位移、應(yīng)力以及加速度峰值放大系數(shù)等參數(shù),得出了相應(yīng)的結(jié)論:地下綜合管廊在地震作用下的整體振動性能良好;斜入射輸入相比于垂直輸入地震動會使結(jié)構(gòu)處于不利的受力狀態(tài),更易于發(fā)生破壞;地下綜合管廊的頂部角點處是最易于發(fā)生破壞的位置,斜入射下內(nèi)部隔板與頂板和底板的角點位置處也是動荷載作用下的危險位置,設(shè)計時應(yīng)該在這些位置給予加固處理。
[Abstract]:The underground integrated pipe gallery is a kind of typical shallow buried underground structure. Compared with the traditional buried pipeline, it solves many problems in the process of urbanization construction, and creates a good underground space utilization and unified management platform. At present, our country strongly supports the development and construction of underground integrated pipe gallery, and many cities have now been built, which is also the hope of creating sponge city in the future. However, the existing codes of our country are almost blank in seismic design. The study of pipe gallery in the design process mostly refers to the seismic design of underground structures such as tunnels, subway and so on. These underground structures are different from the seismic design of comprehensive pipe corridors to some extent. It cannot provide reliable reference for both economy and security. Therefore, on the basis of existing experiments and theories, this paper studies its seismic performance by using finite element analysis software. Through numerical simulation of underground integrated pipe gallery in a practical project, the dynamic responses of underground composite pipe gallery, surrounding soil and internal pipeline are observed under the input condition of oblique incident ground motion. The failure mode is summarized and the explanation of the phenomenon is given. Finally, some suggestions for seismic design are given. The main contents of this paper are as follows: first, aiming at the development situation of underground integrated pipe gallery, the paper systematically arranges the input of oblique incident ground motion and the interaction of soil junction, and expounds the relevant theories. Then, based on the establishment of uniform viscoelastic artificial boundary, the equivalent load calculation formula is derived. The solution of equivalent load on artificial boundary is realized, and the equivalent load input of different nodes on the plane is realized by MATLAB programming. The rationality and accuracy of the input of earthquake load and boundary condition are verified by the model. Secondly, the concrete constitutive analysis model and plastic damage parameters are selected, and the oblique incident earthquake input of the model is realized in the finite element software ABAQUS. The response law of underground integrated pipe gallery under dynamic load is analyzed, and the response law and failure criterion of soil mass, integrated pipe gallery body and inner pipeline under dynamic load are discussed respectively. Thirdly, the factors which may have important influence on the dynamic response law of underground integrated pipe corridor are analyzed one by one. The parameters of soil medium, the input of different amplitude of ground motion and the variation of buried depth of integrated pipe corridor are studied respectively. The parameters of displacement, stress and acceleration peak magnification factor of monitoring points in numerical calculation results are analyzed, and the corresponding conclusions are drawn: the whole vibration performance of underground composite pipe gallery under earthquake is good; Compared with vertical input ground motion, oblique incident input will make the structure in a disadvantageous stress state, and it is more prone to damage. The corner at the top of the underground integrated pipe gallery is the most prone to damage, and the corner position of the internal partition, roof and floor is also the dangerous position under the action of dynamic load under oblique incidence, which should be strengthened in the design.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU990.3;TU311.3
本文編號：2409795
[Abstract]:The underground integrated pipe gallery is a kind of typical shallow buried underground structure. Compared with the traditional buried pipeline, it solves many problems in the process of urbanization construction, and creates a good underground space utilization and unified management platform. At present, our country strongly supports the development and construction of underground integrated pipe gallery, and many cities have now been built, which is also the hope of creating sponge city in the future. However, the existing codes of our country are almost blank in seismic design. The study of pipe gallery in the design process mostly refers to the seismic design of underground structures such as tunnels, subway and so on. These underground structures are different from the seismic design of comprehensive pipe corridors to some extent. It cannot provide reliable reference for both economy and security. Therefore, on the basis of existing experiments and theories, this paper studies its seismic performance by using finite element analysis software. Through numerical simulation of underground integrated pipe gallery in a practical project, the dynamic responses of underground composite pipe gallery, surrounding soil and internal pipeline are observed under the input condition of oblique incident ground motion. The failure mode is summarized and the explanation of the phenomenon is given. Finally, some suggestions for seismic design are given. The main contents of this paper are as follows: first, aiming at the development situation of underground integrated pipe gallery, the paper systematically arranges the input of oblique incident ground motion and the interaction of soil junction, and expounds the relevant theories. Then, based on the establishment of uniform viscoelastic artificial boundary, the equivalent load calculation formula is derived. The solution of equivalent load on artificial boundary is realized, and the equivalent load input of different nodes on the plane is realized by MATLAB programming. The rationality and accuracy of the input of earthquake load and boundary condition are verified by the model. Secondly, the concrete constitutive analysis model and plastic damage parameters are selected, and the oblique incident earthquake input of the model is realized in the finite element software ABAQUS. The response law of underground integrated pipe gallery under dynamic load is analyzed, and the response law and failure criterion of soil mass, integrated pipe gallery body and inner pipeline under dynamic load are discussed respectively. Thirdly, the factors which may have important influence on the dynamic response law of underground integrated pipe corridor are analyzed one by one. The parameters of soil medium, the input of different amplitude of ground motion and the variation of buried depth of integrated pipe corridor are studied respectively. The parameters of displacement, stress and acceleration peak magnification factor of monitoring points in numerical calculation results are analyzed, and the corresponding conclusions are drawn: the whole vibration performance of underground composite pipe gallery under earthquake is good; Compared with vertical input ground motion, oblique incident input will make the structure in a disadvantageous stress state, and it is more prone to damage. The corner at the top of the underground integrated pipe gallery is the most prone to damage, and the corner position of the internal partition, roof and floor is also the dangerous position under the action of dynamic load under oblique incidence, which should be strengthened in the design.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU990.3;TU311.3
【引證文獻】
相關(guān)碩士學(xué)位論文 前3條
1 姜龍;城市地下綜合管廊典型節(jié)點地震響應(yīng)分析[D];廣西大學(xué);2018年
2 黃懿;重載汽車作用下綜合管廊的動力特性試驗研究[D];中南林業(yè)科技大學(xué);2018年
3 楊乾;綜合管廊分支口管道地震動力響應(yīng)研究[D];西南交通大學(xué);2018年
，本文編號：2409795
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