本文選題：儲液池　切入點(diǎn)：震度法　出處：《天津大學(xué)》2014年碩士論文

【摘要】：近年來,隨著地下結(jié)構(gòu)數(shù)量的增多和震害的頻繁出現(xiàn),儲液池因功能的特殊性和重要性,其抗震設(shè)計(jì)和安全性評價(jià)日益受到重視。由于復(fù)雜場地土的動力特性直接影響儲液池結(jié)構(gòu)的抗震性能,因此考慮土層動力特性的變化對儲液池受力性能的影響,其必要性十分顯著;同時(shí),隨著儲液池內(nèi)部結(jié)構(gòu)日趨復(fù)雜,罕遇地震作用下儲液池的三維靜力彈塑性分析已成為工程技術(shù)人員面臨的重要課題,這就是本文研究的初衷。本文在兩階段設(shè)計(jì)法、應(yīng)答震度法、抗震計(jì)算和耐震檢測方法的基礎(chǔ)上,對某凈水廠地下儲液池的抗震計(jì)算進(jìn)行全過程分析整理。本文首先依據(jù)場地土類別和結(jié)構(gòu)的固有周期計(jì)算結(jié)構(gòu)的基準(zhǔn)水平震度Kh0,使用震度法依據(jù)Kh0計(jì)算動荷載并對整體模型進(jìn)行線彈性計(jì)算,得到兩級震、四個(gè)加震方向共八個(gè)工況下與結(jié)構(gòu)相鄰各側(cè)土層的平均剪切角γ;其次依據(jù)土層G/G0-γ曲線,計(jì)算每個(gè)工況下各側(cè)土層動剪切模量值G并分析變化情況和影響因素,由G計(jì)算土彈簧剛度來模擬不同工況下土和儲液池的動力相互作用;最后使用FINAL軟件對儲液池逐級施加靜荷載和地震引起的水平動荷載,基于能量守恒法則計(jì)算設(shè)計(jì)水平震度,以此對罕遇地震作用時(shí)的儲液池進(jìn)行靜力彈塑性分析,并從各種工況中分別得到最不利的地震響應(yīng)以進(jìn)行承載能力極限狀態(tài)下的校核�；贕/G0-γ曲線,用土彈簧等效地反應(yīng)結(jié)構(gòu)與土相互作用的主要動力特性;基于能量守恒法則計(jì)算設(shè)計(jì)水平震度,用靜力彈塑性分析方法反應(yīng)罕遇地震時(shí)儲液池的破壞過程和屈服機(jī)制。本文的研究思路及流程,能夠?yàn)樘胤N儲液池結(jié)構(gòu)的抗震性能設(shè)計(jì)提供一種簡易、可行的方法。
[Abstract]:In recent years, with the increase of the number of underground structures and the frequent occurrence of earthquake damage, the seismic design and safety evaluation of liquid storage tanks have been paid more and more attention due to the particularity and importance of their functions.Because the dynamic characteristics of the soil in complex sites directly affect the seismic performance of the reservoir structure, it is necessary to consider the influence of the dynamic characteristics of the soil layer on the mechanical performance of the reservoir, and at the same time,With the internal structure of liquid storage tank becoming more and more complex, the three-dimensional static elastic-plastic analysis of liquid storage tank under rare earthquake has become an important subject for engineers and technicians, which is the original intention of this paper.On the basis of two-stage design method, seismic response method, seismic calculation and seismic detection method, the whole process of seismic calculation of underground liquid storage tank in a water purification plant is analyzed and sorted out in this paper.In this paper, the reference horizontal seismicity Kh0 of the structure is calculated according to the site soil type and the natural period of the structure, the dynamic load is calculated by using the seismic degree method based on Kh0 and the linear elastic calculation of the whole model is carried out, and the two-magnitude earthquake is obtained.The average shear angle 緯 of each side soil layer adjacent to the structure is calculated under eight working conditions with four seismic directions, and the dynamic shear modulus value G of each side soil layer is calculated according to the G / G0- 緯 curve of soil layer, and the variation and influencing factors are analyzed.The soil spring stiffness is calculated by G to simulate the dynamic interaction between soil and liquid storage tank under different working conditions. Finally, FINAL software is used to apply the static load and horizontal dynamic load caused by earthquake to the reservoir step by step, and the design horizontal earthquake degree is calculated based on the energy conservation law.The static elastic-plastic analysis of liquid storage tank under rare earthquake is carried out, and the most unfavorable seismic response is obtained from various working conditions for checking under the limit state of load-carrying capacity.Based on the G / G0- 緯 curve, the main dynamic characteristics of the interaction between the structure and the soil are equivalent with the soil spring, and the design horizontal earthquake degree is calculated based on the energy conservation law.The failure process and yield mechanism of liquid storage tank under rare earthquake are analyzed by static elastoplastic analysis method.The research idea and flow of this paper can provide a simple and feasible method for the seismic performance design of the special storage tank structure.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU352.11

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