鑄鋼球節(jié)點的內(nèi)力狀態(tài)參數(shù)分析及合理設計
王遠利1，2，馬人樂1
- 摘 要
-
(1 同濟大學土木工程學院，上海200092; 2 廣州容柏生建筑結(jié)構(gòu)設計事務所，廣州510170)［摘要］以球形鑄鋼球節(jié)點為研究對象，對其力學特性進行非線性有限元分析。對內(nèi)力分布，并首次對內(nèi)力狀態(tài)和斷裂特點進行分析，得出鑄鋼節(jié)點在應力集中程度和應力狀態(tài)三維程度上都有明顯改善，容易實現(xiàn)強節(jié)點弱構(gòu)件的設計要求，能夠避免焊接節(jié)點焊縫區(qū)易發(fā)生脆性開裂的危險。鑄鋼節(jié)點的倒角和壁厚的參數(shù)有限元分析結(jié)果表明，倒角和壁厚存在合理的取值范圍，可保證鑄鋼節(jié)點良好的受力特性，提高鑄鋼節(jié)點設計的經(jīng)濟性。［關鍵詞］鑄鋼節(jié)點；應力狀態(tài)；應力集中；斷裂中圖分類號：TU511文獻標識碼：A文章編號：1002-848X(2011)02-0046-03Stress state parameters analysis and reasonable design of cast steel jointsWang Yuanli1，2, Ma Renle2(1 College of Civil Engineering, Tongji University, Shanghai 200092, China;2 RBS Architecture Engineer Design Associates, Guangzhou 510170, China)Abstract:Mechanic performance of cast steel joints was studied including stress distribution, stress state and fracture behaviour. The result of finite element analysis proved that the stress concentration and stress state triaxiality were relieved. The design of strong joint was achieved for structure engineering. Cast steel joints were exonerated from the risk of weld fracture in welded zones. It concluds that there exists reasonable value ranges of fillet angle and wall thickness based on the parameters analysis. Appropriate value can assure the good mechanic performance and economy of cast steel joints design.Keywords:cast steel joint; stress state; stress concentration; fracture作者簡介：王遠利，博士研究生，Email: wangyuanlily@126.com。參考文獻［1］SCHOBER H. Cast steel joints for tubular structures［C］//10th International Symposium on Tubular Structures. Rotterdam: A A Balkema Publishers, 2003： 143-152.［2］VESELCIC M, HERION S, PUTHLI R. Cast steel in tubular bridges-new applications and technologies［C］//10th International Symposium on Tubular Structures. Rotterdam: A A Balkema Publishers, 2003：135-142.［3］STURN S, NUSSBAUMER A, HIRT M A. Fatigue behaviour of cast steel nodes in bridge structures［C］//10th International Symposium on Tubular Structures. Rotterdam: A A Balkema Publishers, 2003：55-62.［4］PIETER C GLIJNIS， JOOST CROMMENTUYN. To cast or not to cast［C］//10th International Symposium on Tubular Structures. Rotterdam: A A Balkerma Publishers, 2003.［5］衛(wèi)星, 李俊, 強士中. 網(wǎng)殼結(jié)構(gòu)鑄鋼球節(jié)點彈塑性分析及試驗研究［J］. 建筑結(jié)構(gòu)學報, 2005, 26(1): 45-51.［6］鄧開國, 李巧. 重慶袁家崗體育中心體育場網(wǎng)殼鑄鋼節(jié)點設計［J］. 建筑結(jié)構(gòu), 2005, 35(8): 52-56.［7］HAN Q H, LIU X L. Ultimate bearing capacity of the welded hollow spherical joints in spatial reticulated structures［J］. Engineering Structures, 2004, 26(1): 73-82.［8］湯安民，王靜. 幾種金屬材料斷裂形式變化規(guī)律的試驗分析［J］. 實驗力學, 2003，18（4）：440-444.［9］RICE J R, TRACY D M. On the ductile enlargement of voids in triaxial stress fields［J］. Journal of Mechanics and Physics of Solids, 1969, 17(2): 201-217.［10］鄭長卿. 金屬韌性破壞的細觀力學及其應用研究［M］. 北京: 國防工業(yè)出版社, 1995.［11］楊衛(wèi). 宏微觀斷裂力學［M］. 北京: 國防工業(yè)出版社, 1995.［12］張建強, 張富巨, 賴荊平. 應力狀態(tài)對16Mn鋼焊接接頭斷裂行為的影響［J］. 武漢水利電力大學學報, 1998, 31(2): 51-55.第41卷 第2期 2011年2月建筑結(jié)構(gòu) Building StructureVol.41 No.2 Feb. 2011
