【摘要】：混凝土異形柱框架結(jié)構(gòu)由于其良好的建筑功能和合理的結(jié)構(gòu)布局,在民用住宅中得到廣泛運(yùn)用。由于異形柱結(jié)構(gòu)中柱截面的特殊形式,異形柱節(jié)點(diǎn)比矩形節(jié)點(diǎn)薄弱。在地震作用下,節(jié)點(diǎn)受力復(fù)雜,異形柱節(jié)點(diǎn)更容易破壞,限制了異形柱結(jié)構(gòu)體系的高度,因此有必要研究增強(qiáng)異形柱節(jié)點(diǎn)受力性能的相關(guān)措施。本文通過在節(jié)點(diǎn)區(qū)增設(shè)X形配筋提高異形柱節(jié)點(diǎn)的抗震性能。對增設(shè)X形配筋的T形柱節(jié)點(diǎn)、十形柱節(jié)點(diǎn)、Z形柱節(jié)點(diǎn)的受力性能分別進(jìn)行有限元分析,研究工作如下:基于增設(shè)X形配筋T形柱節(jié)點(diǎn)試驗(yàn),建立T形柱節(jié)點(diǎn)有限元模型,研究往復(fù)荷載作用下T形柱節(jié)點(diǎn)受力性能。通過對比試驗(yàn)與模型的骨架曲線、承載力和延性,驗(yàn)證模型可靠性。改變X形配筋和梁內(nèi)縱筋參數(shù),對比分析X形配筋增設(shè)對T形柱節(jié)點(diǎn)模型的承載力、延性以及混凝土和鋼筋應(yīng)力引起的變化。研究表明:X形配筋可以提高屈服荷載和峰值荷載,試件的屈服位移減小。基于增設(shè)X形配筋十形柱節(jié)點(diǎn)試驗(yàn),建立十形柱節(jié)點(diǎn)有限元模型,施加往復(fù)荷載。對比試驗(yàn)與模型的骨架曲線、承載力和延性,驗(yàn)證模型可靠性。以X形配筋和梁內(nèi)縱筋為變量,研究十形柱節(jié)點(diǎn)受力性能。研究表明:十形柱節(jié)點(diǎn)模型延性較好,X形配筋提高十形柱節(jié)點(diǎn)屈服荷載和承載力,降低屈服位移。基于Z形柱節(jié)點(diǎn)試驗(yàn),建立Z形柱節(jié)點(diǎn)模型。對比試驗(yàn)與模型承載力,驗(yàn)證模型可靠性。在模型節(jié)點(diǎn)區(qū)腹板中各增設(shè)兩對X形配筋,分析不同X形配筋和梁內(nèi)縱筋條件下,X形配筋對Z形柱節(jié)點(diǎn)受力性能的影響。研究表明:X形配筋對Z形柱節(jié)點(diǎn)承載力提高較小,分擔(dān)節(jié)點(diǎn)區(qū)混凝土和箍筋承擔(dān)的剪力。
[Abstract]:The concrete special-shaped column frame structure is widely used in civil housing because of its good building function and reasonable structural layout. Because of the special form of column section in special-shaped column structure, the joint of special-shaped column is weaker than that of rectangular joint. Under seismic action, the joints are subjected to complex forces, and the joints of special-shaped columns are more easily destroyed, which limits the height of special-shaped column structures. Therefore, it is necessary to study the relevant measures to enhance the mechanical properties of the joints of special-shaped columns. In this paper, the seismic performance of special-shaped column joints is improved by adding X-shaped reinforcement in the joint area. The finite element analysis of T-shaped column joints, ten-column joints and Z-shaped column joints is carried out respectively. The research work is as follows: based on the experiment of adding X-shaped reinforced T-column joints, the finite element model of T-shaped column joints is established. The behavior of T-shaped column joints under reciprocating load is studied. The reliability of the model is verified by comparing the skeleton curve, bearing capacity and ductility of the model. By changing the parameters of X-shaped reinforcement and longitudinal reinforcement in beam, the change of bearing capacity, ductility and stress of concrete and steel bar caused by the addition of X-shaped reinforcement to T-shaped column joint model is analyzed. The results show that the yield load and peak load can be increased and the yield displacement of the specimen is decreased. Based on the test of adding X-shaped reinforced ten-shaped column joint, the finite element model of ten-shaped column joint is established, and the reciprocating load is applied. The skeleton curve, bearing capacity and ductility of the model are compared to verify the reliability of the model. Taking X-shaped reinforcement and longitudinal reinforcement of beam as variables, the mechanical behavior of ten-shaped column joints is studied. The results show that the ductility of the model is good and the yield load and bearing capacity of the joints are increased and the yield displacements are reduced. Based on the test of Z-shaped column joint, the model of Z-shaped column joint is established. The reliability of the model is verified by contrasting test with model bearing capacity. Two pairs of X-shaped reinforcement were added to the web of the model node area. The effect of X-shaped reinforcement on the mechanical behavior of Z-shaped column joints was analyzed under the conditions of different X-shaped reinforcement and longitudinal reinforcement in beam. The results show that the bearing capacity of Z-shaped column joints is increased less by X-shaped reinforcement, and the shear force of concrete and stirrups in the joint zone is shared.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU398.9

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