本文選題：RC掉層框架結(jié)構(gòu) + 非線性分析��； 參考：《重慶大學(xué)》2016年碩士論文

【摘要】：我國(guó)是一個(gè)多山地、多丘陵的國(guó)家,掉層框架結(jié)構(gòu)在山地建筑中應(yīng)用最為廣泛。由于掉層框架結(jié)構(gòu)的特殊接地方式—不等高接地,使結(jié)構(gòu)存在嚴(yán)重的豎向不規(guī)則問(wèn)題,導(dǎo)致其受力性能比普通框架結(jié)構(gòu)要復(fù)雜得多。汶川震害調(diào)查顯示,山地建筑結(jié)構(gòu)都存在不同程度的破壞,目前針對(duì)普通框架結(jié)構(gòu)地震損傷及耗能的研究較多,專門針對(duì)山地建筑結(jié)構(gòu)地震損傷及耗能分配機(jī)制的研究卻相對(duì)較少,所以開(kāi)展平面掉層框架結(jié)構(gòu)和空間掉層框架結(jié)構(gòu)的地震損傷與耗能分配機(jī)制研究具有重要的意義。本文以8度0.2g區(qū)掉不同層數(shù)的RC平面框架結(jié)構(gòu)和空間框架結(jié)構(gòu)為研究對(duì)象,基于非線性分析軟件Perform-3D,分析了結(jié)構(gòu)基于構(gòu)件層次、樓層層次及整體層次的地震損傷情況,并對(duì)結(jié)構(gòu)的耗能分配機(jī)制進(jìn)行了深入研究。通過(guò)本文的研究,得到的主要結(jié)論如下:1.針對(duì)平面掉層框架結(jié)構(gòu):梁的損傷指數(shù)普遍大于柱的,形成“強(qiáng)柱弱梁”破壞機(jī)制;位于上接地層接地跨梁的損傷程度比其它位置的梁嚴(yán)重,柱損傷最嚴(yán)重的部位是上接地柱,且內(nèi)側(cè)各層柱的損傷程度普遍比外側(cè)柱嚴(yán)重。上接地層的層損傷指數(shù)普遍最大,損傷嚴(yán)重。不論是基于構(gòu)件層次還是樓層層次,掉層部分的損傷指數(shù)均很小,基本無(wú)損傷或輕微損傷。2.針對(duì)空間掉層框架結(jié)構(gòu):雙向地震作用下,結(jié)構(gòu)中有部分梁的損傷指數(shù)大于柱,部分梁的損傷指數(shù)小于柱,形成“強(qiáng)梁弱柱”破壞機(jī)制,與平面掉層結(jié)構(gòu)顯著不同;沿X方向,位于上接地層接地跨梁的損傷較嚴(yán)重,上接地柱及其上一層的內(nèi)側(cè)下接地柱的損傷嚴(yán)重,且各層內(nèi)側(cè)上接地柱的損傷指數(shù)普遍比外側(cè)上接地柱的大,說(shuō)明內(nèi)側(cè)上接地柱的損傷較嚴(yán)重。上接地層的損傷最嚴(yán)重,隨著樓層的增加,層損傷指數(shù)逐漸減小,損傷程度越來(lái)越輕;掉層部分的層損傷指數(shù)很小。3.通過(guò)對(duì)比Park-Ang、Kunnath和Lu-Wang三種雙參數(shù)地震損傷模型計(jì)算的損傷指數(shù),發(fā)現(xiàn)Park-Ang損傷模型計(jì)算的構(gòu)件損傷指數(shù)、層損傷指數(shù)和整體損傷指數(shù)普遍大于Kunnath和Lu-Wang損傷模型。4.在平面掉層框架結(jié)構(gòu)和空間掉層框架結(jié)構(gòu)中,上接地層吸收耗散的能量最多,為主要的耗能樓層,隨著樓層的增加,層間滯回耗能百分比f(wàn)i?逐漸減小。對(duì)平面掉層結(jié)構(gòu)而言,梁為主要的耗能構(gòu)件,而在空間掉層結(jié)構(gòu)中,柱的耗能增加,成為主要的耗能構(gòu)件。結(jié)構(gòu)邊跨梁的耗能大于中跨梁,且邊跨梁外側(cè)的耗能多于其內(nèi)側(cè)的耗能;隨著結(jié)構(gòu)樓層的增加,中柱吸收的能量逐漸增加,邊柱則逐漸減小;在上接地層以上,隨著樓層的增加,柱上端吸收的能量普遍逐漸增加,頂層柱下端吸收的能量很少。
[Abstract]:China is a mountainous and hilly country. Due to the special earthing mode of falling floor frame structure, which is not equal to the ground height, there is a serious vertical irregular problem in the structure, and the mechanical performance of the structure is much more complicated than that of the common frame structure. The investigation of Wenchuan earthquake disaster shows that there are different degrees of damage to the structure of mountain buildings. At present, there are more researches on seismic damage and energy dissipation of common frame structures. The research on seismic damage and energy dissipation mechanism of mountain building structure is relatively few, so it is of great significance to study the seismic damage and energy dissipation mechanism of plane floor frame structure and spatial falling floor frame structure. This paper takes the RC plane frame structure and the spatial frame structure with different layers in the 8 degree 0.2g area as the research object. Based on the nonlinear analysis software Perform-3D, the seismic damage of the structure based on the component level, the floor level and the whole level is analyzed. The energy dissipation allocation mechanism of the structure is also studied. Through the study of this paper, the main conclusions are as follows: 1. In view of plane falling frame structure: the damage index of beam is generally larger than that of column, which forms the failure mechanism of "strong column and weak beam"; the damage degree of earthing span beam located in the upper grounding layer is more serious than that of other positions, and the most serious damage part of column is the upper earthing column. The injury degree of the medial column was generally more serious than that of the lateral column. The damage index of the upper ground layer is generally the largest and the damage is serious. Regardless of whether it is based on the component level or the floor level, the damage index of the falling layer is very small, basically no damage or slight damage. 2. The damage index of some beams is larger than that of columns, and the damage index of some beams is smaller than that of columns under the action of bi-directional earthquake, forming the failure mechanism of "strong beam and weak column", which is obviously different from plane falling structure, along X direction, the damage index of some beams is larger than that of column, and the damage index of part of beam is smaller than that of column. The damage of the earthing span beam in the upper grounding layer is more serious, the damage of the upper earthing column and the inner and lower earthing post of the upper layer is serious, and the damage index of the inner earthing post in each layer is generally larger than that of the outer earthing post. It shows that the damage of the inner earthing post is more serious. The damage of the upper ground layer is the most serious, with the increase of the floor, the damage index of the layer decreases gradually, and the damage degree becomes lighter and lighter, and the damage index of the falling layer is very small. 3. By comparing the damage index calculated by Park-Angn Kunnath model and Lu-Wang damage model, it is found that the damage index, layer damage index and global damage index calculated by Park-Ang damage model are generally larger than those calculated by Kunnath and Lu-Wang damage models. In the plane floor frame structure and the spatial floor frame structure, the upper ground layer absorbs the most dissipated energy, which is the main energy dissipation floor. With the increase of floor, the percentage of energy dissipation between layers hysteretic energy consumption? Gradually decrease. For plane floor structure, beam is the main energy dissipation component, while in space falling structure, the energy consumption of column increases and becomes the main energy dissipation member. The energy consumption of the side span beam is larger than that of the middle span beam, and the energy consumption on the outside of the side span beam is more than that on the inside; with the increase of the floor of the structure, the energy absorbed by the middle column increases gradually, and the side column decreases gradually. With the increase of the floor, the energy absorbed by the upper end of the column is gradually increased, and the energy absorbed by the lower end of the top column is very little.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TU375.4

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