發(fā)布時間：2018-02-14 16:18

  本文關(guān)鍵詞： 仿古建筑 圓形鋼管柱 工字鋼雙梁 異型節(jié)點(diǎn) 節(jié)點(diǎn)核心區(qū) 抗剪承載力　出處：《西安建筑科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：仿古建筑現(xiàn)在如雨后春筍般矗立在中國的許多地方，因?yàn)樗粌H滿足了人們的審美需求，更是傳承了中國的傳統(tǒng)文化。由于節(jié)點(diǎn)是結(jié)構(gòu)中的關(guān)鍵部位，需要深入研究仿古建筑特殊節(jié)點(diǎn)形式的性能及其設(shè)計方法，本文是基于古建筑中闌額、由額與柱組成的節(jié)點(diǎn)形式為原型進(jìn)行的研究，采用鋼結(jié)構(gòu)制成的特殊節(jié)點(diǎn)，并將節(jié)點(diǎn)域從上至下依次分為3個核心區(qū)：A、B、C。本文主要研究圓鋼管柱-工字鋼雙梁節(jié)點(diǎn)的性能以及節(jié)點(diǎn)的抗剪承載力，主要的研究內(nèi)容與成果如下所示： 1.為了研究仿古建筑圓形鋼柱-工字鋼雙梁節(jié)點(diǎn)的破壞特征和受力機(jī)理，本文設(shè)計了4個節(jié)點(diǎn)均進(jìn)行了低周反復(fù)加載，并考慮參數(shù)軸壓比為0.3和0.6的影響。分析了參數(shù)對構(gòu)件性能的影響，研究在低周反復(fù)荷載作用下節(jié)點(diǎn)的延性、耗能、強(qiáng)度退化和剛度退化規(guī)律。由試驗(yàn)結(jié)果可得：C核心區(qū)出現(xiàn)剪切斜裂縫和嚴(yán)重屈曲導(dǎo)致節(jié)點(diǎn)破壞；節(jié)點(diǎn)的滯回曲線相對飽滿，延性系數(shù)介于2.30~3.16之間，強(qiáng)度、剛度隨著位移加載級數(shù)退化穩(wěn)定，節(jié)點(diǎn)耗能的等效粘滯阻尼系數(shù)介于0.19~0.31之間。 2.通過試驗(yàn)的結(jié)果可得節(jié)點(diǎn)的荷載-位移滯回曲線及骨架曲線，確定其相應(yīng)的特征點(diǎn)并建立計算模型，依據(jù)節(jié)點(diǎn)的受力特性以及破壞機(jī)理提出節(jié)點(diǎn)的抗剪承載力公式，由力學(xué)公式推導(dǎo)出圓形鋼管截面的正應(yīng)力和剪應(yīng)力，，參照第四強(qiáng)度理論求得鋼管壁的折算應(yīng)力，依此求得鋼管截面處的最大剪應(yīng)力。參照抗震規(guī)范對節(jié)點(diǎn)域剪應(yīng)力進(jìn)行的系數(shù)修正，并考慮軸壓比對構(gòu)件的影響得出相應(yīng)的節(jié)點(diǎn)抗剪承載力公式。
[Abstract]:Antiquated buildings are now springing up in many parts of China, because they not only satisfy people's aesthetic needs, but also inherit Chinese traditional culture. It is necessary to deeply study the performance and design method of the special joint form of the ancient building. This paper is based on the research of the diaphragm in the ancient building, which is based on the prototype of the joint form composed of the forehead and the column, and adopts the special joint made of the steel structure. The joint domain is divided into three core regions in turn: 1. The paper mainly studies the properties of round steel tube-I-beam joints and the shear bearing capacity of joints. The main research contents and results are as follows:. 1. In order to study the failure characteristics and mechanical mechanism of circular steel column-I-beam joints in archaic buildings, four joints are designed for repeated low-cycle loading. Considering the influence of the axial compression ratio of 0.3 and 0.6, the effect of parameters on the performance of the members is analyzed, and the ductility and energy dissipation of the joints under low cyclic cyclic loading are studied. According to the experimental results, shear slanting cracks and severe buckling in the core area of W C lead to the joint failure, the hysteretic curve of the joints is relatively full, and the ductility coefficient is between 2.30 and 3.16. The stiffness degenerates steadily with the displacement loading, and the equivalent viscous damping coefficient of the node energy dissipation is between 0.19 and 0.31. 2. The load-displacement hysteretic curve and skeleton curve can be obtained from the test results, the corresponding characteristic points are determined and the calculation model is established. According to the stress characteristics of the joints and the failure mechanism, the shear bearing capacity formula of the joints is proposed. The normal stress and shear stress of circular steel tube section are derived from the mechanical formula, and the converted stress of steel tube wall is obtained by referring to the 4th strength theory. According to this, the maximum shear stress at the section of the steel pipe is obtained, the coefficient of shear stress in the joint region is modified by referring to the seismic code, and the corresponding formula of the shear bearing capacity of the joint is obtained considering the influence of the axial compression ratio on the members.
【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】：2014
【分類號】：TU391

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本文編號：1511100