本文選題：弦支子結(jié)構(gòu)　切入點(diǎn)：巨型網(wǎng)格結(jié)構(gòu)　出處：《遼寧工程技術(shù)大學(xué)》2014年碩士論文

【摘要】：在巨型網(wǎng)格結(jié)構(gòu)和弦支結(jié)構(gòu)的理論基礎(chǔ)上提出了一種有桿、索、梁共同作用的新型空間雜交結(jié)構(gòu)體系-弦支子結(jié)構(gòu)的巨型曲面結(jié)構(gòu)。這種結(jié)構(gòu)是由巨型網(wǎng)格結(jié)構(gòu),弦支子結(jié)構(gòu)及主體預(yù)應(yīng)力拉索組成,文中通過(guò)有限元分析軟件對(duì)結(jié)構(gòu)的靜動(dòng)力性能進(jìn)行了詳細(xì)的分析。通過(guò)預(yù)應(yīng)力取值原則及結(jié)構(gòu)優(yōu)化分析結(jié)果,建立了200m跨度的弦支子結(jié)構(gòu)巨型曲面結(jié)構(gòu)的計(jì)算模型。與相同參數(shù)的普通巨型網(wǎng)格結(jié)構(gòu)進(jìn)行對(duì)比分析得到該結(jié)構(gòu)的節(jié)點(diǎn)位移與桿件應(yīng)力較小,同時(shí)針對(duì)該結(jié)構(gòu)的各項(xiàng)參數(shù)進(jìn)行對(duì)比分析可知,結(jié)構(gòu)跨度有一定限制,矢跨比不宜過(guò)大,桁架梁高度對(duì)靜力性能影響較小,預(yù)應(yīng)力在取值范圍內(nèi)越大,結(jié)構(gòu)位移及應(yīng)力越小。通過(guò)與普通網(wǎng)格結(jié)構(gòu)的模態(tài)分析進(jìn)行對(duì)比可知該結(jié)構(gòu)的首階自振頻率較大,說(shuō)明結(jié)構(gòu)剛度較大,研究了跨度、矢跨比、桁架梁高度等參數(shù)對(duì)結(jié)構(gòu)自振頻率的影響。采用時(shí)程分析方法對(duì)弦支子結(jié)構(gòu)的巨型曲面結(jié)構(gòu)進(jìn)行地震響應(yīng)分析得出該結(jié)構(gòu)以豎向振動(dòng)為主,同時(shí)研究了參數(shù)變化對(duì)結(jié)構(gòu)地震位移響應(yīng)的影響并得出了部分桿件內(nèi)力與節(jié)點(diǎn)位移的變化規(guī)律。通過(guò)對(duì)安陽(yáng)某電廠干煤棚結(jié)構(gòu)與該結(jié)構(gòu)進(jìn)行靜動(dòng)力特性對(duì)比分析,可知該結(jié)構(gòu)在靜動(dòng)力特性方面比干煤棚結(jié)構(gòu)要好,同時(shí)用鋼量方面要比干煤棚結(jié)構(gòu)節(jié)省,因此該結(jié)構(gòu)形式在此類結(jié)構(gòu)中具有較好的應(yīng)用價(jià)值。
[Abstract]:Based on the theory of giant grid structure and chord branch structure, a new type of space hybrid structure system, chord supported substructure, is proposed, which is composed of giant grid structure, which is composed of rod, cable and beam. In this paper, the static and dynamic properties of the chord-supported sub-structure and the main body of prestressed cable are analyzed in detail by the finite element analysis software, and by the principle of prestress and the result of structural optimization analysis, the static and dynamic properties of the structure are analyzed in detail. The calculation model of giant curved surface structure with 200m span chord-supported substructure is established. Compared with the common giant grid structure with the same parameters, it is found that the node displacement and the member stress of the structure are smaller than those of the normal mega grid structure with the same parameters. At the same time, by comparing and analyzing the parameters of the structure, we can see that the span of the structure is limited, the rise-span ratio should not be too large, the height of the truss beam has little influence on the static performance, and the prestress is larger in the range of value. The smaller the displacement and stress of the structure are, the higher the natural frequency of the first order of the structure is, and the larger the stiffness of the structure is, by comparing with the modal analysis of the common grid structure, the span and the rise-span ratio of the structure are studied. The influence of truss beam height and other parameters on the natural vibration frequency of the structure is analyzed. The seismic response of the giant curved surface structure of chord-supported substructure is analyzed by time-history analysis method, and it is concluded that the structure is mainly vertical vibration. At the same time, the influence of parameter change on the seismic displacement response of the structure is studied, and the variation law of internal force and node displacement of some members is obtained. The static and dynamic characteristics of the dry coal shed structure and the structure in Anyang power plant are compared and analyzed. It is known that the structure is better in static and dynamic characteristics than that in dry coal shed structure, and the steel content is more economical than that in dry coal shed structure, so the structure form has better application value in this kind of structure.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU399

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本文編號(hào)：1654094