本文選題：單層球面網(wǎng)殼 + 纖維損傷��； 參考：《北京工業(yè)大學(xué)》2015年博士論文

【摘要】：單層球面網(wǎng)殼由于其輕盈,優(yōu)美等眾多優(yōu)點(diǎn),被廣泛應(yīng)用于當(dāng)代大跨空間結(jié)構(gòu)之中。然而近年來(lái)地震的頻發(fā),單層球面網(wǎng)殼的動(dòng)力失效問(wèn)題成為當(dāng)前研究熱點(diǎn)。本文主要從以下幾個(gè)方面進(jìn)行深入探討:考慮材料損傷,從能量角度探索單層球面網(wǎng)殼動(dòng)力失效判別準(zhǔn)則;進(jìn)行單層球面網(wǎng)殼動(dòng)力失效的全過(guò)程試驗(yàn);建立結(jié)構(gòu)損傷演化模擬的隱式算法,研究動(dòng)力作用下單層球面網(wǎng)殼損傷的發(fā)展過(guò)程及結(jié)構(gòu)動(dòng)力失效的全過(guò)程,最后結(jié)合計(jì)算機(jī)模擬結(jié)果及試驗(yàn)結(jié)果,研究提高單層球面網(wǎng)殼抗失效能力的方法。主要工作與結(jié)論有:(1)建立了基于桿件纖維損傷的結(jié)構(gòu)損傷演化模擬方法對(duì)于桿件的材料損傷,結(jié)合ABAQUS中材料子程序的FRTRAN接口,考慮材料的損傷累積過(guò)程,編寫(xiě)材料子程序。通過(guò)把空間桿件截面劃分為多個(gè)積分點(diǎn),實(shí)現(xiàn)了截面纖維損傷計(jì)算,進(jìn)而從微觀角度觀察材料損傷的變化過(guò)程。根據(jù)纖維失效給出桿件剛度變化并形成了隱式算法。結(jié)合已有的幾個(gè)試驗(yàn)結(jié)果,進(jìn)行計(jì)算機(jī)模擬,驗(yàn)證了材料子程序和模擬方法的正確性。從而為進(jìn)一步研究單層球面網(wǎng)殼的動(dòng)力損傷過(guò)程奠定了基礎(chǔ)。(2)進(jìn)行了基于時(shí)效的單層球殼損傷演化及震后承載力分析采用本文建立的結(jié)構(gòu)損傷演化模擬方法,對(duì)一單層球面網(wǎng)殼模型進(jìn)行強(qiáng)震作用下的響應(yīng)分析。結(jié)果表明:隨著地震作用的持續(xù),單層球面網(wǎng)殼失效具有從單元體破壞開(kāi)始,逐步發(fā)展的特點(diǎn);探討了結(jié)構(gòu)損傷以致失效的演化規(guī)律,給出了單層球面網(wǎng)殼的失效模式。進(jìn)一步通過(guò)對(duì)不同時(shí)長(zhǎng)、不同PGA情況下單層球殼極限承載力分析,得出對(duì)于震后結(jié)構(gòu)極限承載力的評(píng)估,需要同時(shí)考慮地震峰值的大小和作用時(shí)長(zhǎng)的結(jié)論,并擬合出單層球面網(wǎng)殼震后承載力和多參數(shù)之間的函數(shù)關(guān)系,這對(duì)震后結(jié)構(gòu)的安全評(píng)定,具有重要意義。(3)提出了基于動(dòng)能的單層球面網(wǎng)殼動(dòng)力失效判別準(zhǔn)則振動(dòng)過(guò)程中結(jié)構(gòu)動(dòng)能必然發(fā)生波動(dòng),而發(fā)生動(dòng)力失效時(shí)結(jié)構(gòu)動(dòng)能必將發(fā)生劇烈變化。為此,本文避開(kāi)采用塑性應(yīng)變能或最大位移通過(guò)統(tǒng)計(jì)作為失效判別指標(biāo),從動(dòng)能的角度去探討一種判別單層球面網(wǎng)殼動(dòng)力失效的準(zhǔn)則。通過(guò)研究動(dòng)能增量的變化形式與單層球面網(wǎng)殼失效可能性的關(guān)系,結(jié)合動(dòng)能增量振動(dòng)曲線,提出了單層球面網(wǎng)殼動(dòng)力失效判別準(zhǔn)則。該準(zhǔn)則簡(jiǎn)潔、明了,并且有利于程序的實(shí)現(xiàn)。算例分析表明該準(zhǔn)則對(duì)于單層球面網(wǎng)殼穩(wěn)定破壞和強(qiáng)度破壞均有效。(4)基于Python開(kāi)發(fā)ABAQUS,實(shí)現(xiàn)了結(jié)構(gòu)失效自動(dòng)判斷功能通過(guò)ABAQUS的腳本接口,該接口在Python語(yǔ)言的基礎(chǔ)上進(jìn)行的定制開(kāi)發(fā),采用Python語(yǔ)言編寫(xiě)的程序,通過(guò)腳本接口直接和軟件內(nèi)核進(jìn)行對(duì)話。結(jié)合基于動(dòng)能的單層球面網(wǎng)殼失效判別準(zhǔn)則,編寫(xiě)基于IDA的計(jì)算程序,從而實(shí)現(xiàn)ABAQUS在單層球面網(wǎng)殼動(dòng)力計(jì)算過(guò)程中的結(jié)構(gòu)失效自動(dòng)判斷功能。(5)成功地實(shí)現(xiàn)了單層球面網(wǎng)殼動(dòng)力失效全過(guò)程試驗(yàn)通常由于動(dòng)力破壞的突然性而難以通過(guò)試驗(yàn)得到結(jié)構(gòu)失效的全過(guò)程。本文利用現(xiàn)有的試驗(yàn)室條件,針對(duì)一個(gè)單層球面網(wǎng)殼的振動(dòng)臺(tái)試驗(yàn),通過(guò)低頻調(diào)幅加載獲得桿件陸續(xù)進(jìn)入塑性的規(guī)律,從而可評(píng)估結(jié)構(gòu)的損傷程度;通過(guò)基頻簡(jiǎn)諧加載獲得節(jié)點(diǎn)位移時(shí)程,從而實(shí)現(xiàn)了結(jié)構(gòu)失效全過(guò)程的監(jiān)測(cè)。并通過(guò)該試驗(yàn)驗(yàn)證了本文建立的結(jié)構(gòu)損傷演化模擬方法和單層球面網(wǎng)殼動(dòng)力失效判別準(zhǔn)則。(6)提出了提高單層球面網(wǎng)殼抗失效能力的措施試驗(yàn)與數(shù)值模擬均表明在強(qiáng)震作用下,單層球面網(wǎng)殼的環(huán)向桿件最先進(jìn)入塑性,而且由于存在彎矩的作用均是桿件根部先進(jìn)入塑性。本著延緩結(jié)構(gòu)塑性發(fā)展的原則,通過(guò)多種工況對(duì)比分析不同環(huán)桿加強(qiáng)后結(jié)構(gòu)的塑性發(fā)展情況,最后得出了對(duì)于施威德勒型網(wǎng)殼加強(qiáng)跨度1/4處的環(huán)桿和加大桿件根部均為有效的措施。根據(jù)本文提出的動(dòng)力失效判別準(zhǔn)則,采取措施后結(jié)構(gòu)失效時(shí)刻得以明顯延遲。
[Abstract]:Single layer spherical reticulated shell has been widely used in modern large span space structure because of its advantages of lightness, grace and so on. However, in recent years, the dynamic failure of single layer spherical reticulated shell has become a hot topic in recent years. This paper is mainly to discuss the following aspects: considering material damage and exploring single layer from the angle of energy The dynamic failure criterion of the spherical reticulated shell, the whole process test of the dynamic failure of the single layer reticulated shell, the implicit algorithm of the structural damage evolution simulation, the development process of the damage of the single layer spherical reticulated shell under dynamic action and the whole process of the dynamic failure of the structure are studied. Finally, the improvement of the single layer is studied in combination with the simulation results and the experimental results. The main work and conclusions are as follows: (1) a structural damage evolution simulation method based on rod fiber damage is established for material damage of rod, combined with the FRTRAN interface of the material subroutine in ABAQUS, considering the damage accumulation process of the material, and compiling the subprogram of material. Several integral points are used to calculate the fiber damage of the section, and then the change process of material damage is observed from the microcosmic angle. According to the fiber failure, the change of the stiffness of the rod is given and the implicit algorithm is formed. The computer simulation is carried out with several experimental results. The correctness of the material subprogram and the simulation method is verified. The study of the dynamic damage process of single layer spherical reticulated shell has laid the foundation. (2) the damage evolution of single layer spherical shell based on aging and the analysis of post earthquake bearing capacity are used to simulate the structural damage evolution in this paper, and the response analysis of a single layer spherical reticulated shell model under strong earthquake action is carried out. The results show that with the continuous earthquake action, the single spherical reticulated shell model is subjected to the response analysis. The failure of the layer spherical reticulated shell has the characteristics of the beginning of the failure of the unit body and the gradual development. The evolution law of the structural damage and failure is discussed. The failure mode of the single layer spherical reticulated shell is given. The ultimate bearing capacity of the single layer spherical shell in different time length and different PGA conditions is analyzed, and the evaluation of the ultimate bearing capacity of the structure after the earthquake is obtained. It is necessary to take the conclusion of the magnitude of the earthquake peak and the length of action at the same time, and fit the function relation between the post earthquake bearing capacity and the multi parameters of the single layer spherical reticulated shell, which is of great significance to the safety assessment of the post earthquake structure. (3) the dynamic energy of the dynamic failure of the single layer spherical reticulated shell based on the kinetic energy is proposed. In this paper, a criterion for determining the dynamic failure of a single layer reticulated spherical reticulated shell is discussed from the point of view of kinetic energy. The relationship between the failure possibility of the reticulated shell and the kinetic energy increment vibration curve, a criterion for the dynamic failure of the single layer spherical reticulated shell is proposed. The criterion is concise, clear and beneficial to the realization of the program. The example analysis shows that the criterion is effective for the stability and strength failure of a single layer spherical reticulated shell. (4) the structure is developed based on Python, and the structure is realized. The function of automatic failure judgment is made through the script interface of ABAQUS. The interface is developed on the basis of the Python language, the program written in the Python language is written in the language, and the software kernel is dialogically dialogically with the script interface. It combines the failure criterion of the single layer spherical reticulated shell based on the kinetic energy, and writes the computing program based on the IDA to realize the AB AQUS in the dynamic calculation of the single layer spherical reticulated shell. (5) the whole process test of the dynamic failure of the single layer spherical reticulated shell is successfully realized. The whole process of structural failure is difficult to be obtained by the test of the dynamic failure. The shaking table test of the shell is used to obtain the plastic law of the member through the low frequency amplitude modulation loading, thus the damage degree of the structure can be evaluated. The displacement time history of the node is obtained through the basic frequency simple harmonic loading, thus the whole process of structural failure is monitored. The simulation method and single layer of structural damage evolution established in this paper has been verified by the experiment. The criterion for dynamic failure of a spherical reticulated shell. (6) the test and numerical simulation of improving the anti failure ability of a single-layer spherical reticulated shell show that the ring member of a single-layer spherical reticulated shell is the first to enter the plastic under strong earthquake action, and the effect of the moment is the advanced plasticity of the root of the member. In principle, through a variety of working conditions, the plastic development of the reinforced structure with different ring bars is analyzed. Finally, the effective measures are obtained for the reinforcement of the ring rod and the root of the member at 1/4 span of the schwedeler type reticulated shell. According to the dynamic failure criterion proposed in this paper, the failure time of the structure is obviously delayed.

【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU399;TU317

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8 王燕麗;單層球面網(wǎng)殼考慮地震空間相關(guān)性效應(yīng)的參數(shù)分析研究[D];哈爾濱工業(yè)大學(xué);2013年

9 高廣燕;單層球面網(wǎng)殼結(jié)構(gòu)地震概率風(fēng)險(xiǎn)評(píng)估研究[D];哈爾濱工業(yè)大學(xué);2012年

10 練蘭英;凱威特型單層球面網(wǎng)殼隨機(jī)缺陷穩(wěn)定性分析[D];南京航空航天大學(xué);2010年

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