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 (1 四川建筑職業(yè)技術(shù)學(xué)院，德陽 618000；2 西南交通大學(xué)土木工程學(xué)院，成都 610031)

［摘要］結(jié)合某大跨度鋼管結(jié)構(gòu)樹形管柱分叉節(jié)點(diǎn)，從受力、工藝和經(jīng)濟(jì)性出發(fā)，研究了局部與整體混尺度條件下的節(jié)點(diǎn)極限承載力。在非線性牛頓-拉普森方法中引入微動(dòng)力阻尼系數(shù)抑制次生動(dòng)力，考慮了無加強(qiáng)、內(nèi)加勁、主管局部加厚與支管和主管局部加厚4種模式，分析節(jié)點(diǎn)顯式破壞模式。研究表明，加強(qiáng)節(jié)點(diǎn)可有效改變節(jié)點(diǎn)的破壞模式，提高節(jié)點(diǎn)承載力。綜合而言，在實(shí)際工程中，樹形柱分叉節(jié)點(diǎn)采用局部加厚更為適用。

［關(guān)鍵詞］樹形結(jié)構(gòu)；分叉節(jié)點(diǎn)；強(qiáng)化節(jié)點(diǎn)；微動(dòng)力阻尼系數(shù)；非線性分析

Nonlinear analysis on ultimate bearing capacity of branch joints in tree steel pipe structures

Shao Liqun1, Yu Zhixiang2, Wu Mingjun1

(1 Sichuan College of Architectural Technology, Deyang 618000, China;

2 Civil Engineering College of Southwest Jiaotong University, Chengdu 610031,China)

Abstract:According to a steel pipe column with the tree form in a long span steel truss structure, the static behavior of the tree form joint was studied based on static mechanical behavior, technology and economy with multi-scale calculation which contains both macroscopic and microscopic finite element models. Full Newton-Raphson algorithm was applied in nonlinear analysis,and low-speed dynamic damping factor was introduced to restrain the secondary dynamic effect. The implicit failure modes analysis was carried out on joints with four types which were non-strengthen,ribbed,local stiffness respectively in the main pipe of the connection region and the main pipe and branch pipe around the connection. The result indicates that the strengthen points can effectively improve the failure modes,and it is better to reinforce the joints in local region.

Keywords:tree structure; branch joint; strengthen joint; low-speed dynamic damping factor; nonlinear analysis

作者簡(jiǎn)介：邵力群，副教授，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：kuyuzihe@163.com。

參考文獻(xiàn)

［1］李敬學(xué). 上海南站站臺(tái)雨棚結(jié)構(gòu)設(shè)計(jì)［J］. 鐵道工程學(xué)報(bào),2008,117(6):80-83.

［2］鮑廣鑑，王宏，徐重良，等. 樹枝結(jié)構(gòu)及巨型鑄鋼的應(yīng)用與研究——深圳文化中心鋼結(jié)構(gòu)施工技術(shù)［J］.鋼結(jié)構(gòu),2003,18(6):15-18.

［3］謝浩文,黃孚浩,朱晗迓.解構(gòu)鑄鋼節(jié)點(diǎn)［J］. 深圳土木與建筑,2007,4(4):60-63.

［4］趙鵬飛,潘國(guó)華,湯榮偉，等.武漢火車站復(fù)雜大型鋼結(jié)構(gòu)體系研究［J］.建筑結(jié)構(gòu),2009,39(1):1-4.

［5］譚德遠(yuǎn). 黃金樹結(jié)構(gòu)兩種節(jié)點(diǎn)可選方案的性能比較［J］.鋼結(jié)構(gòu),2002,17(3):19-20.

［6］PACKER J A, HENDERSON J E, CAO J J. 空心管結(jié)構(gòu)連接設(shè)計(jì)指南［M］.北京：科學(xué)出版社，1997.

［7］WARDENIE J. Hollow sections in structural applications［M］.張其林，劉大康，譯.上海：同濟(jì)大學(xué)出版社，2002.

［8］Adina theory and modeling guide［M］. ADINA R&D, Inc,2005.