【摘要】：1960年,匹茲堡大廈的建成拉開了高層斜交網(wǎng)格結(jié)構(gòu)研究的序幕。到21世紀初,對高層斜交網(wǎng)格結(jié)構(gòu)的研究也越來越多,相關(guān)的研究成果正不斷地以文獻或工程實例的形式展現(xiàn)出來。高層斜交網(wǎng)格結(jié)構(gòu)作為建筑領(lǐng)域的新姿態(tài),它造型多樣,美觀大氣,將其研究做深做全做細,有利于我國經(jīng)濟的發(fā)展,也將推動學(xué)術(shù)界的創(chuàng)新。通過有限元分析軟件SAP2000建立了不含樓板、核心內(nèi)筒和連系梁的高層斜交網(wǎng)格外框筒結(jié)構(gòu)模型、只設(shè)核心筒的高層斜交網(wǎng)格結(jié)構(gòu)模型及在核心筒基礎(chǔ)上加設(shè)樓板的高層斜交網(wǎng)格結(jié)構(gòu)模型,對上述三個不同結(jié)構(gòu)形式的高層斜交網(wǎng)格結(jié)構(gòu)模型施加豎向荷載。在彈性范圍內(nèi),分析外筒結(jié)構(gòu)整體變形曲線得到了豎向荷載作用下,高層斜交網(wǎng)格結(jié)構(gòu)獨特的外鼓特征,即側(cè)移規(guī)律。分析該規(guī)律產(chǎn)生的原因,同時建議采用側(cè)移較小的結(jié)構(gòu)形式,符合現(xiàn)有工程實例普遍應(yīng)用的結(jié)構(gòu)形式。又改變荷載值的大小,總結(jié)了高層斜交網(wǎng)格結(jié)構(gòu)的變形隨荷載值變化的變化規(guī)律,同時指出構(gòu)件內(nèi)力特點。通過斜柱受力后的幾何變形圖,得出斜柱變形與結(jié)構(gòu)側(cè)向位移的關(guān)系,推導(dǎo)出計算高層斜交網(wǎng)格結(jié)構(gòu)豎向荷載作用下最大側(cè)向位移的理論公式。與有限元分析結(jié)果對比得出,該公式的計算結(jié)果具有一定的參考價值,可以用來初步估算高層斜交網(wǎng)格結(jié)構(gòu)豎向荷載作用下的側(cè)移值。定義斜柱與水平方向的夾角為斜交角度,通過對斜交角度為37.56°、45.71°、56.96°、66.56°、71.99°以及77.77°的六個高層斜交網(wǎng)格結(jié)構(gòu)模型施加豎向荷載,研究斜交角度在高層斜交網(wǎng)格結(jié)構(gòu)側(cè)移規(guī)律中所起的重要作用。通過對比六個不同斜交角度的高層斜交網(wǎng)格結(jié)構(gòu)模型側(cè)移曲線,結(jié)合第二章得出的側(cè)移規(guī)律,發(fā)現(xiàn)斜交角度小于50°的兩個結(jié)構(gòu)模型側(cè)移曲線變異,不符合規(guī)范規(guī)定,將其舍棄并對剩下的結(jié)構(gòu)模型繼續(xù)研究其外鼓側(cè)移的影響因素。最后分別以斜交角度為56.96°、66.56°、71.99°以及77.77°的四個高層斜交網(wǎng)格結(jié)構(gòu)模型為研究對象,研究加強節(jié)點、增加斜柱截面面積和增加環(huán)梁截面面積對高層斜交網(wǎng)格結(jié)構(gòu)豎向荷載作用下側(cè)移值的影響。得出三種措施較實用的為加強節(jié)點和增加環(huán)梁截面面積,增加斜柱截面面積的做法意義不大。在斜交角度較小時,加強節(jié)點同時加強節(jié)點附近部分環(huán)梁,是充分提高高層斜交網(wǎng)格結(jié)構(gòu)的受豎向力性能的一個經(jīng)濟的措施。
[Abstract]:In 1960, the construction of Pittsburgh Building opened the prelude to the study of high-rise skew grid structure. At the beginning of the 21st century, there are more and more studies on the high-rise skew grid structure, and the related research results are constantly presented in the form of literature or engineering examples. As a new attitude in the field of architecture, the high-rise skew grid structure has a variety of shapes and beautiful atmosphere. It is beneficial to the economic development of our country and will also promote the innovation of academic circles. The special frame-tube structure model of high-rise skew network without floor, core inner tube and connecting beam is established by finite element analysis software SAP2000. Only the high-rise skew grid structure model of the core tube and the high-rise skew grid structure model with the floor added to the core tube are set up to apply vertical loads to the above three different structural forms of the high-rise skew grid structure model. In the elastic range, the unique outer drum characteristics, that is, the lateral displacement law, of the high-rise skew grid structure under vertical load are obtained by analyzing the overall deformation curve of the outer tube structure. The causes of this law are analyzed, and it is suggested that the structural form with small lateral displacement should be adopted, which is in line with the commonly used structural form of existing engineering examples. The variation law of the deformation of the high-rise skew grid structure with the load value is summarized by changing the load value, and the internal force characteristics of the component are pointed out at the same time. Based on the geometric deformation diagram of oblique column, the relationship between the deformation of inclined column and the lateral displacement of the structure is obtained, and the theoretical formula for calculating the maximum lateral displacement of high-rise skew grid structure under vertical load is derived. Compared with the results of finite element analysis, the calculated results of the formula have certain reference value and can be used to estimate the lateral displacement of high-rise skew grid structures under vertical load. The angle between the oblique column and the horizontal direction is defined as the oblique angle, and the vertical load is applied to six high-rise skew grid structure models with oblique angles of 37.56 擄, 45.71 擄, 56.96 擄, 66.56 擄, 71.99 擄and 77.77 擄. The important role of skew angle in the lateral displacement of high-rise skew grid structures is studied. By comparing the lateral displacement curves of six high-rise skew grid models with different skew angles, combined with the lateral displacement law obtained in the second chapter, it is found that the variation of the lateral displacement curves of the two structural models with oblique angles less than 50 擄is not in accordance with the code. The factors affecting the lateral displacement of the outer drum were studied by abandoning it and continuing to study the remaining structural models. Finally, four high-rise skew grid structure models with oblique angles of 56.96 擄, 66.56 擄, 71.99 擄and 77.77 擄are taken as the research objects to study the strengthened nodes. The influence of increasing the section area of oblique column and ring beam on the lateral displacement of high-rise skew grid structure under vertical load. It is concluded that it is of little significance to strengthen the joint and increase the cross section area of the ring beam and increase the section area of the inclined column in order to strengthen the joint and increase the cross section area of the ring beam. When the skew angle is small, strengthening the joint and strengthening some ring beams near the joint is an economic measure to fully improve the vertical force performance of the high-rise skew grid structure.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU973

【參考文獻】

相關(guān)期刊論文 前10條

1 史慶軒;任浩;戎，

本文編號：2479971