本文選題：強(qiáng)震作用 + 矢跨比�。� 參考：《蘭州理工大學(xué)》2011年碩士論文

【摘要】：近些年來,空間結(jié)構(gòu)的發(fā)展相當(dāng)迅猛。并且很多空間建筑已成為藝術(shù)作品被人們所津津樂道。網(wǎng)殼結(jié)構(gòu)是一種頗具魅力的空間網(wǎng)格結(jié)構(gòu),因其造型美觀、受力合理、能覆蓋較大的空間,被廣泛應(yīng)用于體育場(chǎng)館、車站、會(huì)展中心以及其它重要的公共建筑中,結(jié)構(gòu)重要性等級(jí)通常較高,一旦發(fā)生破壞對(duì)人民的生命財(cái)產(chǎn)造成嚴(yán)重危害。 關(guān)于空間結(jié)構(gòu)在靜力方面的研究時(shí)至今日已經(jīng)取得了很大的成就,其基本理論已經(jīng)相當(dāng)成熟。但其在動(dòng)力特別是像在地震作用下的力學(xué)性能還處于發(fā)展和完善階段。因此研究大跨度空間結(jié)構(gòu)在強(qiáng)震作用下的響應(yīng)具有重大的現(xiàn)實(shí)意義。在強(qiáng)震等動(dòng)力荷載作用下,網(wǎng)殼可能出現(xiàn)塑性發(fā)展較淺,結(jié)構(gòu)剛度幾乎沒有削弱,結(jié)構(gòu)位移較小的動(dòng)力失穩(wěn)破壞。也可能出現(xiàn)結(jié)構(gòu)塑性發(fā)展較深,剛度嚴(yán)重削弱的強(qiáng)度破壞,也可能出現(xiàn)動(dòng)力失穩(wěn)破壞與結(jié)構(gòu)強(qiáng)度破壞的綜合作用。 本文結(jié)合最近的參考文獻(xiàn),在前人的工作基礎(chǔ)之上,以單層球面K8型網(wǎng)殼及慶陽體育館為工程背景,利用非線性有限元理論,通過大型有限元軟件ANSYS研究了網(wǎng)殼結(jié)構(gòu)在強(qiáng)震作用下的動(dòng)力性能及破壞模式。主要工作如下: (1).首先對(duì)工程中常用矢跨比為1/3、1/5、1/7的單層球面K8型網(wǎng)殼進(jìn)行了模態(tài)分析,總結(jié)了隨矢跨比變化網(wǎng)殼結(jié)構(gòu)自振特性的變化規(guī)律,及其靜力恒荷載幾何剛度對(duì)結(jié)構(gòu)自振特性的影響; (2).在模態(tài)分析的基礎(chǔ)上,采用基于結(jié)構(gòu)響應(yīng)的全過程分析方法,利用軟件ANSYS,綜合宏觀、微觀響應(yīng)指標(biāo),對(duì)單層K8型球面網(wǎng)殼進(jìn)行動(dòng)力分析研究;并通過典型算例的分析比較,確定了單層K8型球面網(wǎng)殼的破壞模式及其特征; (3).利用前面對(duì)單層K8球面網(wǎng)殼的研究成果,對(duì)實(shí)際一復(fù)雜雙層網(wǎng)殼——慶陽體育館進(jìn)行了考慮靜力恒荷載幾何剛度影響下的模態(tài)分析,并在模態(tài)分析的基礎(chǔ)之上對(duì)其進(jìn)行了動(dòng)力時(shí)程分析,探討這種復(fù)雜雙層網(wǎng)殼其在強(qiáng)震下的動(dòng)力特性。
[Abstract]:In recent years, the development of space structure is quite rapid. And many space architecture has become a work of art that people enjoy talking about. The reticulated shell structure is a kind of attractive spatial grid structure, which is widely used in stadiums, stations, exhibition centers and other important public buildings because of its beautiful shape, reasonable force and the ability to cover large space. The level of structural importance is usually high, and damage to people's lives and property is serious. Great achievements have been made in the research of spatial structure in static force, and its basic theory has been quite mature. But its mechanical properties under dynamic, especially seismic action, are still in the development and improvement stage. Therefore, it is of great practical significance to study the response of long span space structures under strong earthquakes. Under the action of strong earthquake and other dynamic loads, the dynamic instability of reticulated shell may occur, such as shallow plastic development, almost no weakening of structural stiffness and small displacement of the structure. It is also possible that the structural plastic development is deep and the stiffness is seriously weakened, and the combined effect of dynamic instability failure and structural strength failure may also occur. In this paper, based on the previous work and the engineering background of single-layer spherical K8 reticulated shell and Qingyang Gymnasium, the nonlinear finite element theory is used. The dynamic behavior and failure mode of latticed shell structures under strong earthquake are studied by ANSYS. The main work is as follows: (1). First of all, the modal analysis of single-layer spherical K8 reticulated shell with a ratio of 1 / 3 / 1 / 5 / 1 / 7 is carried out, and the variation law of the natural vibration characteristics of latticed shell structure with the ratio of vector to span is summarized. The influence of geometric stiffness of static constant load on the natural vibration characteristics of the structure; (2). On the basis of modal analysis, the dynamic analysis of single-layer K8 spherical reticulated shell is carried out by using the whole process analysis method based on structural response, using the software ANSYSand synthesizing macro and micro response indexes, and through the analysis and comparison of typical examples, the dynamic analysis of single-layer K8 spherical reticulated shell is carried out. The failure mode and characteristics of single-layer K _ 8 spherical reticulated shell are determined. (3). Based on the previous research results of single-layer K8 spherical reticulated shell, the modal analysis of a complex double-layer reticulated shell-Qingyang Gymnasium under the influence of geometric stiffness of static constant load is carried out. On the basis of modal analysis, the dynamic time history analysis is carried out, and the dynamic characteristics of this complex double-layer latticed shell under strong earthquake are discussed.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TU399

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 姬淑艷;李英民;劉立平;賴明;;考慮雙向水平地震作用的結(jié)構(gòu)設(shè)計(jì)問題研究[J];地震工程與工程振動(dòng);2006年05期

2 董石麟，，姚諫;網(wǎng)殼結(jié)構(gòu)的未來與展望[J];空間結(jié)構(gòu);1994年01期

3 陳軍明,陳應(yīng)波,吳代華;單層球面網(wǎng)殼結(jié)構(gòu)抗震性能研究[J];空間結(jié)構(gòu);2001年04期

4 郭海山,沈世釗;單層網(wǎng)殼結(jié)構(gòu)動(dòng)力穩(wěn)定性分析方法[J];建筑結(jié)構(gòu)學(xué)報(bào);2003年03期

5 曹資,張毅剛;單層球面網(wǎng)殼地震反應(yīng)特征分析[J];建筑結(jié)構(gòu);1998年08期

6 沈世釗;大跨空間結(jié)構(gòu)的發(fā)展——回顧與展望[J];土木工程學(xué)報(bào);1998年03期

7 沈世釗,支旭東;球面網(wǎng)殼結(jié)構(gòu)在強(qiáng)震下的失效機(jī)理[J];土木工程學(xué)報(bào);2005年01期

8 范峰,錢宏亮,謝禮立;最不利地震動(dòng)在網(wǎng)殼結(jié)構(gòu)抗震設(shè)計(jì)中的應(yīng)用[J];世界地震工程;2003年03期

9 陳軍明,陳應(yīng)波,吳代華;單層球面網(wǎng)殼結(jié)構(gòu)的動(dòng)力特性研究[J];武漢工業(yè)大學(xué)學(xué)報(bào);1999年05期

相關(guān)碩士學(xué)位論文 前3條

1 燕保軍;考慮底部框架共同作用下單層網(wǎng)殼的非線性動(dòng)力分析[D];河北農(nóng)業(yè)大學(xué);2007年

2 李彥君;考慮下部結(jié)構(gòu)的單層球面網(wǎng)殼在強(qiáng)震下的破壞機(jī)理研究[D];太原理工大學(xué);2007年

3 肖秀蘭;網(wǎng)殼結(jié)構(gòu)非線性及隨機(jī)缺陷分析[D];湖南大學(xué);2006年

本文編號(hào)：2108074