發(fā)布時間：2018-05-11 07:22

  本文選題：SRC柱 + 雙軸加載　； 參考：《西安建筑科技大學(xué)》2013年碩士論文

【摘要】：型鋼混凝土（SRC）組合結(jié)構(gòu)是目前高層建筑中一種常用的結(jié)構(gòu)體系，，具有承載力高、剛度大及抗震性能好等優(yōu)點，與傳統(tǒng)的鋼結(jié)構(gòu)和混凝土結(jié)構(gòu)相比，SRC組合結(jié)構(gòu)表現(xiàn)出了更好的性能優(yōu)勢和發(fā)展前景。現(xiàn)階段國內(nèi)外主要針對單向水平地震作用進(jìn)行了研究，對考慮雙向水平地震作用耦合影響結(jié)構(gòu)的地震反應(yīng)和抗震性能，雖然開展了一定研究，但從研究內(nèi)容的深度和廣度上仍處于初級階段，亟待開展更深入的研究。 首先運用有限元軟件ABAQUS對已有試驗的8根SRC柱進(jìn)行仿真模擬，目的在于驗證有限元軟件ABAQUS對單軸低周反復(fù)荷載作用下SRC的模擬能力，以及驗證建模的有效性，在此基礎(chǔ)上進(jìn)行雙軸低周反復(fù)荷載作用下SRC柱的有限元模擬，并研究8種常見的雙軸加載路徑、軸壓比、位移幅值循環(huán)次數(shù)及位移幅值增量等因素對SRC柱的屈服荷載、峰值荷載、位移延性和滯回耗能等抗震性能影響，研究混凝土、型鋼及鋼筋的屈服和破壞過程、破壞形態(tài)，并分析雙軸加載路徑、軸壓比、位移幅值循環(huán)次數(shù)及位移幅值增量對其破壞形態(tài)的影響。通過深入比較國內(nèi)現(xiàn)有規(guī)程雙向偏心受壓SRC柱的計算方法，得出N-M的關(guān)系曲線，研究現(xiàn)有規(guī)程中雙向偏心受壓柱的計算差異�？偨Y(jié)前人的研究成果，經(jīng)過統(tǒng)計分析，提出了一種雙向偏心受壓柱正截面承載力簡化后的實用計算公式。經(jīng)計算，采用本文所給公式的計算結(jié)果與試驗結(jié)果比值為1.00、均方差為0.02、變異系數(shù)為0.14，表明與試驗結(jié)果吻合較好，并驗證了公式的適用范圍，發(fā)現(xiàn)修正后的公式可以用來計算配I型鋼矩形截面雙向偏心受壓SRC柱的正截面承載力。
[Abstract]:Steel reinforced concrete (SRC) composite structure is a commonly used structural system in high-rise buildings at present. It has the advantages of high bearing capacity, high stiffness and good seismic performance. Compared with the traditional steel structure and concrete structure, the SRC composite structure has better performance advantages and development prospects. At present, the unidirectional horizontal seismic action is mainly studied at home and abroad. Although the seismic response and seismic performance of the structure are affected by the coupling of the two-way horizontal seismic action, although some studies have been carried out. However, the depth and breadth of the research content is still in the primary stage, it is urgent to carry out more in-depth research. At first, eight SRC columns are simulated by finite element software ABAQUS. The purpose of this paper is to verify the simulation ability of ABAQUS to SRC under uniaxial low cyclic loading, and to verify the validity of modeling. On this basis, the finite element simulation of SRC columns under biaxial low cycle cyclic loading is carried out, and the yield loads of eight common biaxial loading paths, axial compression ratios, displacement amplitude cycles and displacement amplitude increments on SRC columns are studied. The effects of peak load, displacement ductility and hysteretic energy dissipation on seismic behavior are studied. The yield and failure process of concrete, section steel and steel bar, the failure form, and the biaxial loading path, axial compression ratio, and so on, are studied. The influence of the number of cycles of displacement amplitude and the increment of displacement amplitude on its failure pattern. By comparing the calculation methods of bidirectional eccentric compression SRC columns with existing rules in China, the relationship curve of N-M is obtained, and the difference of calculation of bidirectional eccentric columns in existing regulations is studied. This paper summarizes the previous research results and puts forward a practical formula for calculating the normal section bearing capacity of biaxial eccentrically compressed columns after statistical analysis. By calculation, the ratio of the calculated results to the test results is 1.00, the mean square deviation is 0.02, and the coefficient of variation is 0.14, which indicates that the formula is in good agreement with the experimental results, and verifies the applicable range of the formula. It is found that the modified formula can be used to calculate the normal section bearing capacity of SRC columns under biaxial eccentric compression with I-section rectangular section.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU398.9;TU352.11

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