本文選題：中心支撐鋼框架　切入點(diǎn)：抗震性能　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：板式連接鉸接中心支撐鋼框架結(jié)構(gòu)的節(jié)點(diǎn)設(shè)計(jì)、加工和安裝簡單方便。支撐與梁、柱采用節(jié)點(diǎn)板連接,不但傳力明確,構(gòu)造簡單,具有一定的耗能能力,而且更加接近于兩端鉸接、以受軸力為主的情況,同時(shí)該體系在高烈度區(qū)也具有良好的抗震性能。但是我國相關(guān)規(guī)范中對于板式連接中心支撐鋼框架的設(shè)計(jì)條款并不完善,國內(nèi)對這種結(jié)構(gòu)的抗震性能尚沒有系統(tǒng)、深入的研究。本文針對使用板式連接節(jié)點(diǎn)的中心支撐鋼框架結(jié)構(gòu),通過抗震試驗(yàn)研究和ABAQUS有限元分析相結(jié)合的方法,獲得結(jié)構(gòu)體系的地震反應(yīng)特性、極限荷載及延性水平,檢驗(yàn)構(gòu)件、節(jié)點(diǎn)等構(gòu)造措施的合理性,研究節(jié)點(diǎn)板附近梁、柱上附加彎矩的變化規(guī)律,驗(yàn)證節(jié)點(diǎn)板上支撐端部凈距對支撐與節(jié)點(diǎn)板壽命的影響。主要內(nèi)容如下:1.基于中心支撐鋼框架以及板式連接節(jié)點(diǎn)的抗震設(shè)計(jì)方法,確保強(qiáng)節(jié)點(diǎn)、弱構(gòu)件的抗震設(shè)防原則,按1:4縮尺設(shè)計(jì)3層振動(dòng)臺試驗(yàn)?zāi)Ｐ秃桶?:2.6縮尺設(shè)計(jì)兩榀3層推覆試驗(yàn)?zāi)Ｐ?考慮了支撐長細(xì)比、板件寬厚比、節(jié)點(diǎn)板在支撐端部凈距等關(guān)鍵參數(shù)的影響。2.對振動(dòng)臺試驗(yàn)?zāi)Ｐ瓦M(jìn)行24種地震動(dòng)工況的模擬振動(dòng)臺試驗(yàn),獲得了結(jié)構(gòu)的位移及加速度響應(yīng)、動(dòng)力特性、結(jié)構(gòu)的破壞模式、梁柱及節(jié)點(diǎn)板關(guān)鍵點(diǎn)的應(yīng)變數(shù)據(jù)、支撐的平面外和軸向變形以及支撐的軸力等。分析了結(jié)構(gòu)的抗震性能、梁柱上附加彎矩的大小和變化規(guī)律,驗(yàn)證了支撐板式節(jié)點(diǎn)連接抗震設(shè)計(jì)方法的合理性。3.使用ABAQUS有限元程序,建立振動(dòng)臺試驗(yàn)試件的的殼單元模型,模擬振動(dòng)臺試驗(yàn)結(jié)果;將有限元計(jì)算結(jié)果與模擬振動(dòng)臺試驗(yàn)結(jié)果進(jìn)行對比和補(bǔ)充,分析二者的異同,驗(yàn)證有限元模擬的可靠性,為空間模型的整體分析提供依據(jù)。4.對兩榀3層板式連接鉸接中心支撐鋼框架模型進(jìn)行靜力推覆試驗(yàn)。獲得了結(jié)構(gòu)的破壞模式、荷載與層間側(cè)移曲線、關(guān)鍵節(jié)點(diǎn)上的熱點(diǎn)應(yīng)變、支撐的面外及軸向變形、支撐的軸力等關(guān)鍵數(shù)據(jù)。分析了結(jié)構(gòu)的極限承載力、延性水平、結(jié)構(gòu)影響系數(shù)、破壞順序以及梁柱上附加彎矩的大小和變化規(guī)律。5.總結(jié)前人關(guān)于板式連接節(jié)點(diǎn)鉸接框架梁柱上附加彎矩的有限元模擬及試驗(yàn)結(jié)果,提出梁柱上附加彎矩指數(shù)的設(shè)計(jì)建議取值,并利用本文試驗(yàn)實(shí)測值進(jìn)行驗(yàn)證,保證取值的可靠性。
[Abstract]:The joint design, processing and installation of the steel frame structure with plate connection hinge center are simple and convenient. The connection of support, beam and column with joint plate not only has clear force transfer, simple construction, but also has certain energy consumption ability. Moreover, it is closer to the two ends of hinged joints and is mainly subjected to axial force. At the same time, the system also has good seismic performance in the high intensity region. However, the design provisions of the steel frame with plate connection center support in the relevant codes of our country are not perfect. The aseismic performance of this kind of structure has not been systematically studied in our country. In this paper, the method of combining seismic test and ABAQUS finite element analysis is used for the steel frame structure with central braced frame with plate connections. The seismic response characteristics, ultimate load and ductility level of the structure system are obtained, and the rationality of structural measures such as members and joints are examined. The variation law of additional bending moment on the column and beam near the joint plate is studied. The main contents are as follows: 1. Based on the seismic design method of central braced steel frame and plate connections, the seismic fortification principle of strong joints and weak members is ensured. A three-story shaking table test model is designed according to 1: 4 scale and two three-story nappe test models are designed according to 1: 2.6 scale. The ratio of supporting length to thickness and the ratio of width to thickness of plate are taken into account. The influence of the key parameters such as the net distance of the joint plate in the support end. 2. The shaking table test was carried out on the shaking table test model under 24 kinds of ground motion conditions, and the displacement and acceleration response, dynamic characteristics and failure mode of the structure were obtained. The strain data of Liang Zhu and the key points of the joint plate, the out-of-plane and axial deformation of the brace and the axial force of the bracing are analyzed. The aseismic performance of the structure, the magnitude and variation law of the additional bending moment on Liang Zhu are analyzed. The rationality of seismic design method of braced plate joint connection is verified. Using ABAQUS finite element program, the shell element model of shaking table test specimen is established, and the results of shaking table test are simulated. The finite element calculation results are compared with the simulated shaking table test results, the similarities and differences between them are analyzed, and the reliability of the finite element simulation is verified. This paper provides the basis for the overall analysis of the spatial model. 4. Static and force push-over tests are carried out on two steel frame models with three laminated hinged central braces. The failure mode of the structure, the load and interstory lateral displacement curves, the hot spot strain at the key joints are obtained. The key data such as out-of-plane and axial deformation of bracing, axial force of bracing and so on are analyzed. The ultimate bearing capacity, ductility level, influence coefficient of structure are analyzed. Failure sequence and the magnitude and variation of additional moment on Liang Zhu .5.Summing up the finite element simulation and experimental results of previous researches on the additional moment of plate joint hinge frame Liang Zhu, and putting forward the suggested design value of additional moment index on Liang Zhu. The experimental data are verified by this paper to ensure the reliability of the values.
【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】：2015
【分類號】：TU352.11;TU391

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本文編號：1568756