發(fā)布時(shí)間：2018-10-10 19:51

【摘要】：目前,國(guó)內(nèi)外對(duì)開(kāi)合屋蓋結(jié)構(gòu)設(shè)計(jì)的系統(tǒng)研究仍不完善,為促進(jìn)開(kāi)合屋蓋結(jié)構(gòu)快速發(fā)展,我國(guó)正在編制《開(kāi)合屋蓋結(jié)構(gòu)設(shè)計(jì)規(guī)程》,其中在抗雪設(shè)計(jì)方面,開(kāi)合屋蓋因存在多個(gè)狀態(tài)以及運(yùn)行問(wèn)題,較常規(guī)結(jié)構(gòu)有更多要求。本文利用風(fēng)致雪漂移試驗(yàn)及數(shù)值模擬方法研究三種典型剛性開(kāi)合屋蓋的積雪分布規(guī)律;最后利用ABAQUS有限元軟件模擬積雪滑落的沖擊效應(yīng)。主要工作和結(jié)論包括以下幾個(gè)方面:(1)確定了基于FLUENT的風(fēng)致雪漂移數(shù)值方法。在是否考慮積雪面的反饋?zhàn)饔玫膶?duì)比中發(fā)現(xiàn)采用風(fēng)雪單向耦合的穩(wěn)態(tài)方法能較好地反映出發(fā)生積雪沉積或侵蝕的峰值位置及大小。采用標(biāo)準(zhǔn)k-ε模型更好地反應(yīng)風(fēng)雪流的湍流情況,并通過(guò)與實(shí)測(cè)值的對(duì)比驗(yàn)證了數(shù)值方法的可行性。(2)基于躍移層無(wú)量綱體積傳輸率一致的相似準(zhǔn)則,采用風(fēng)雪聯(lián)合試驗(yàn)裝置對(duì)水平移動(dòng)開(kāi)合屋蓋進(jìn)行風(fēng)致雪漂移試驗(yàn),模擬介質(zhì)為人造雪,分析了不同開(kāi)啟狀態(tài)、風(fēng)速、風(fēng)向角下的屋面雪深分布特征。與數(shù)值模擬結(jié)果對(duì)比發(fā)現(xiàn):積雪發(fā)生沉積的范圍存在差異,但積雪分布形式滿足相同規(guī)律。(3)利用數(shù)值模擬方法研究三種開(kāi)合屋蓋形式在不同開(kāi)啟狀態(tài)、風(fēng)速、風(fēng)向角下的屋面分布特征,探討了矢跨比和屋蓋突起高度對(duì)積雪分布的影響,并參照現(xiàn)有規(guī)范提出其積雪分布建議。研究表明屋蓋高度對(duì)積雪分布的影響僅局限于局部區(qū)域;矢跨比直接影響屋蓋形狀,是影響積雪分布的關(guān)鍵因素。(4)基于Johnson-Cook本構(gòu)和失效模型,采用ABAQUS有限元軟件分析了屋面局部積雪滑落對(duì)擋雪欄桿的沖擊效應(yīng)。研究表明積雪滑落的沖擊作用顯著,擋雪欄桿受積雪滑落沖擊時(shí)破壞模式為發(fā)生塑性彎曲變形;而帶有擋雪夾的擋雪系統(tǒng)對(duì)抵抗大體積積雪滑落的能力差,通過(guò)分析總結(jié)對(duì)雪夾構(gòu)造及布置形式提出了改進(jìn)建議。
[Abstract]:At present, the systematic research on the structural design of the open and closed roof is still imperfect. In order to promote the rapid development of the open and closed roof structure, our country is compiling the Design Specification of the Open and closed Roof structure, which is in the aspect of snow resistant design. The opening and closing roof has more requirements than the conventional structure due to the existence of multiple states and operation problems. In this paper, the snow cover distribution of three typical rigid open and close roofs is studied by wind induced snow drift test and numerical simulation. Finally, the impact effect of snow fall is simulated by ABAQUS finite element software. The main work and conclusions are as follows: (1) A numerical method of wind-induced snow drift based on FLUENT is established. It is found that the steady-state method of wind and snow one-way coupling can better reflect the peak position and magnitude of snow deposition or erosion in the comparison of whether or not the feedback action of snow cover surface is taken into account. The standard k- 蔚 model is used to better reflect the turbulent flow of the wind and snow flow, and the feasibility of the numerical method is verified by comparison with the measured values. (2) based on the similarity criterion of the dimensionless volume transfer rate of the jump layer, The wind-induced snow drift test of horizontal moving open and close roof was carried out by using a combined test device of snow and snow. The snow depth distribution characteristics of roof under different open state, wind speed and wind direction angle were analyzed in the simulated medium of artificial snow. Compared with the results of numerical simulation, it is found that there are differences in the range of snow deposition, but the distribution of snow cover satisfies the same law. (3) numerical simulation method is used to study the three open and closed roof forms in different open states and wind speed. The characteristics of roof distribution under wind direction angle are discussed. The effects of the rise-to-span ratio and the height of roof protuberance on the snow cover distribution are discussed, and suggestions for snow cover distribution are put forward with reference to the existing codes. The results show that the influence of roof height on snow cover distribution is limited to local area, and the ratio of rise-to-span directly affects the shape of the roof, which is the key factor affecting snow cover distribution. (4) based on Johnson-Cook constitutive model and failure model, ABAQUS finite element software is used to analyze the impact effect of local snow sliding on snow barrier railings. The results show that the impact of snow slide is obvious, the damage mode of snow barrier is plastic bending deformation, and the snow retaining system with snow clip has poor ability to resist large volume snow fall. By analyzing and summarizing the structure and arrangement of snow clip, some suggestions are put forward.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU312.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 郜雅;劉紅波;陳志華;;于家堡貝殼形單層網(wǎng)殼不均勻雪荷載研究[J];空間結(jié)構(gòu);2016年02期

2 康路陽(yáng);周fE毅;顧明;;考慮積雪休止角的屋面積雪漂移數(shù)值模擬方法[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年01期

3 李躍;袁行飛;;大跨度球殼屋蓋風(fēng)致積雪數(shù)值模擬及雪荷載不均勻分布系數(shù)研究[J];建筑結(jié)構(gòu)學(xué)報(bào);2014年10期

4 孫曉穎;洪財(cái)濱;武岳;;典型形式大跨度屋蓋風(fēng)雪漂移的數(shù)值模擬[J];振動(dòng)與沖擊;2014年18期

5 王衛(wèi)華;廖海黎;李明水;;基于時(shí)變邊界屋面積雪分布數(shù)值模擬[J];西南交通大學(xué)學(xué)報(bào);2013年05期

6 范重;胡純煬;李麗;欒海強(qiáng);彭翼;劉先明;;鄂爾多斯東勝體育場(chǎng)開(kāi)合屋蓋結(jié)構(gòu)設(shè)計(jì)[J];建筑結(jié)構(gòu);2013年09期

7 范重;王義華;欒海強(qiáng);楊蘇;胡純煬;;開(kāi)合屋蓋結(jié)構(gòu)設(shè)計(jì)荷載取值研究[J];建筑結(jié)構(gòu);2011年12期

8 孫芳錦;張大明;殷志祥;;大跨度膜屋面風(fēng)致雪壓的數(shù)值模擬研究[J];鄭州大學(xué)學(xué)報(bào)(工學(xué)版);2010年01期

9 周fE毅;顧明;;風(fēng)致積雪漂移堆積效應(yīng)的研究進(jìn)展[J];工程力學(xué);2008年07期

相關(guān)會(huì)議論文 前2條

1 秦乃兵;張毅剛;;大跨度剛性開(kāi)合結(jié)構(gòu)抗震抗風(fēng)性能研究及展望[A];第三屆全國(guó)現(xiàn)代結(jié)構(gòu)工程學(xué)術(shù)研討會(huì)論文集[C];2003年

2 周fE毅;顧明;李雪峰;;北京首都機(jī)場(chǎng)3號(hào)航站樓屋面風(fēng)致雪壓分布的影響因素分析[A];第十三屆全國(guó)結(jié)構(gòu)風(fēng)工程學(xué)術(shù)會(huì)議論文集（下冊(cè)）[C];2007年

相關(guān)博士學(xué)位論文 前2條

1 林莉;網(wǎng)殼結(jié)構(gòu)沖擊響應(yīng)及失效機(jī)理精細(xì)化研究[D];哈爾濱工業(yè)大學(xué);2015年

2 王衛(wèi)華;風(fēng)致屋面積雪分布特性風(fēng)洞實(shí)驗(yàn)與數(shù)值模擬研究[D];西南交通大學(xué);2014年

相關(guān)碩士學(xué)位論文 前5條

1 王世玉;屋面積雪的實(shí)測(cè)與風(fēng)洞試驗(yàn)基礎(chǔ)研究[D];哈爾濱工業(yè)大學(xué);2013年

2 洪財(cái)濱;典型形式大跨度屋蓋風(fēng)致雪漂移的數(shù)值模擬研究[D];哈爾濱工業(yè)大學(xué);2012年

3 莫華美;典型屋面積雪分布的數(shù)值模擬與實(shí)測(cè)研究[D];哈爾濱工業(yè)大學(xué);2011年

4 豁國(guó)鋒;開(kāi)合屋蓋結(jié)構(gòu)設(shè)計(jì)方法與風(fēng)壓分布的數(shù)值模擬研究[D];浙江大學(xué);2007年

5 楊治;開(kāi)合屋蓋結(jié)構(gòu)設(shè)計(jì)方法研究[D];浙江大學(xué);2005年

，

本文編號(hào)：2263035