發(fā)布時(shí)間：2018-10-12 17:42

【摘要】：網(wǎng)架結(jié)構(gòu)具有空間受力合理、自重輕、空間剛度大以及形式多樣新穎、容易滿足藝術(shù)創(chuàng)造力等多種其他結(jié)構(gòu)難以取代的優(yōu)點(diǎn),因而被廣泛應(yīng)用于各種大型公共建筑、大型體育場(chǎng)館、會(huì)展中心、博物館、火車站、工業(yè)廠房等大跨度結(jié)構(gòu)和具有某些特殊功能要求的結(jié)構(gòu)中,成為了目前應(yīng)用最為廣泛的大跨度結(jié)構(gòu)形式之一。然而,由于一些建筑在使用功能上、造型上等方面的要求,部分大跨度結(jié)構(gòu)需要在不同的部位開(kāi)洞,導(dǎo)致屋蓋平面形狀不規(guī)則,在目前對(duì)此類開(kāi)洞網(wǎng)架結(jié)構(gòu)研究甚少和現(xiàn)行設(shè)計(jì)方法尚未有明確規(guī)定的情況下,對(duì)其靜動(dòng)力性能進(jìn)行分析研究是非常有意義的。本文采用有限元方法,對(duì)大跨度開(kāi)洞網(wǎng)架結(jié)構(gòu)進(jìn)行了靜力特性、穩(wěn)定性、自振特性及地震響應(yīng)進(jìn)行了分析,研究了不同開(kāi)洞大小和位置對(duì)網(wǎng)架靜動(dòng)力特性的影響,并提出了設(shè)計(jì)建議,主要研究包括以下幾個(gè)方面的內(nèi)容： 1.對(duì)開(kāi)洞、不開(kāi)洞及加強(qiáng)洞口等網(wǎng)架結(jié)構(gòu)進(jìn)行靜力分析,研究了不同開(kāi)洞大小和位置對(duì)網(wǎng)架結(jié)構(gòu)內(nèi)力、位移分布等情況的影響,對(duì)比分析了開(kāi)洞和不開(kāi)洞結(jié)構(gòu)的靜力特性,并對(duì)開(kāi)洞網(wǎng)架結(jié)構(gòu)提出加強(qiáng)剛度和承載力的措施。 2.對(duì)開(kāi)洞、不開(kāi)洞及加強(qiáng)洞口等網(wǎng)架結(jié)構(gòu)進(jìn)行線性屈曲分析和非線性屈曲分析。考慮材料和幾何雙重非線性,研究了不同開(kāi)洞大小和位置對(duì)網(wǎng)架結(jié)構(gòu)穩(wěn)定承載力的影響,并對(duì)比分析了開(kāi)洞和不開(kāi)洞結(jié)構(gòu)的穩(wěn)定承載力。 3.對(duì)開(kāi)洞、不開(kāi)洞及加強(qiáng)洞口等網(wǎng)架結(jié)構(gòu)進(jìn)行有限元模態(tài)分析,獲取各階自振頻率及對(duì)應(yīng)振型,分析了不同開(kāi)洞大小和位置對(duì)網(wǎng)架結(jié)構(gòu)自振特性的影響。 4.利用振型反應(yīng)譜和時(shí)程法分別對(duì)開(kāi)洞、不開(kāi)洞及加強(qiáng)洞口等網(wǎng)架結(jié)構(gòu)進(jìn)行了地震分析,得出了開(kāi)洞網(wǎng)架結(jié)構(gòu)在地震作用下的位移、軸力,并對(duì)比分析了開(kāi)洞與不開(kāi)洞網(wǎng)架結(jié)構(gòu)計(jì)算結(jié)果上的差異,研究了不同開(kāi)洞大小和位置對(duì)網(wǎng)架結(jié)構(gòu)抗震承載力的影響。
[Abstract]:The space truss structure has the advantages of reasonable space force, light weight, large spatial stiffness, various and novel forms, easy to meet the artistic creativity and other difficult to replace other structures, so it is widely used in all kinds of large public buildings. Large-scale stadiums, exhibition centers, museums, railway stations, industrial buildings and other long-span structures and structures with some special functional requirements have become one of the most widely used long-span structures. However, due to the requirements of some buildings in the aspects of function and shape, some long-span structures need to open holes in different parts, resulting in irregular plane shape of roof. It is very meaningful to analyze and study the static and dynamic performance of this kind of open hole space truss structure under the condition that there are few researches on it and the current design method has not been clearly stipulated at present. In this paper, the static characteristics, stability, natural vibration characteristics and seismic response of long-span open-hole space truss structures are analyzed by using finite element method, and the effects of different hole sizes and positions on the static and dynamic characteristics of grid structures are studied. And put forward the design suggestions, the main research includes the following aspects: 1. In this paper, the static analysis of space truss structure such as opening, non-opening and strengthening hole is carried out, and the influence of different hole size and position on the internal force and displacement distribution of space truss structure is studied, and the static characteristics of the opening structure and the non-opening structure are compared and analyzed. The measures to strengthen the stiffness and bearing capacity of the open space truss structure are put forward. 2. Linear buckling analysis and nonlinear buckling analysis are carried out for space truss structures such as openings, non-openings and reinforced openings. Considering the double nonlinearity of material and geometry, the influence of different hole sizes and positions on the stability bearing capacity of space truss structures is studied, and the stability bearing capacity of open and non-perforated structures is compared and analyzed. The finite element modal analysis is carried out for the space truss structures, such as opening, non-opening and strengthening openings, and the natural frequencies and corresponding modes of each order are obtained, and the influence of the size and position of the holes on the natural vibration characteristics of the latticed truss structures is analyzed. 4. In this paper, the seismic analysis of the reticulated structures such as opening, non-opening and strengthening openings are carried out by using the mode response spectrum and the time-process method, respectively, and the displacement and axial forces of the open-hole grid structures under earthquake action are obtained. The difference between the calculation results of the space truss structure with and without holes is analyzed, and the influence of the size and position of the opening hole on the seismic bearing capacity of the space truss structure is studied.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TU356;TU311

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 徐驅(qū);大跨度三角錐網(wǎng)架結(jié)構(gòu)開(kāi)洞下的性能研究[D];長(zhǎng)沙理工大學(xué);2012年

，

本文編號(hào)：2267024