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（中冶建筑研究總院有限公司， 北京 100088）

［摘要］夾板式螺栓節(jié)點(diǎn)在各類輕工業(yè)建筑的懸掛運(yùn)輸軌道中廣泛應(yīng)用，近年來(lái)也逐漸被汽車生產(chǎn)工業(yè)建筑所選用。然而某采用該類連接節(jié)點(diǎn)的小型汽車生產(chǎn)廠房，在使用1到5年內(nèi)，該類連接節(jié)點(diǎn)螺栓陸續(xù)發(fā)生斷裂。通過(guò)螺栓斷面分析、現(xiàn)場(chǎng)吊桿應(yīng)力與螺栓軸力測(cè)試、有限元計(jì)算分析及疲勞強(qiáng)度驗(yàn)算，揭示了該類節(jié)點(diǎn)在小型汽車工業(yè)廠房中的斷裂屬于疲勞破壞，采用Monte Carlo法，進(jìn)行了該類節(jié)點(diǎn)在小型汽車生產(chǎn)廠房中的疲勞可靠性分析，指出若設(shè)計(jì)時(shí)僅考慮靜力強(qiáng)度，其疲勞可靠指標(biāo)較低，失效概率較高，建議該類節(jié)點(diǎn)在汽車生產(chǎn)工業(yè)建筑中應(yīng)用時(shí)，進(jìn)行疲勞強(qiáng)度驗(yàn)算。

［關(guān)鍵詞］懸掛軌道； 螺栓節(jié)點(diǎn)； 疲勞； 可靠性

中圖分類號(hào)：TU392-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)16-0097-04

Fatigue reliability analysis of splint-type bolt joints in hanging transportation structures

Zhao Xiaoqing, Xing Kuntao, Wang Xinquan, Chang Haosong

（China Metallurgical Construction Research Institute Co., Ltd., Beijing 100088, China）

Abstract:Splint-type bolt joints are widely used in the hanging transportation structures of various light industrial buildings. In recent years, they have gradually been used for automotive industrial buildings. However, in a small automobile production plant that adopts this type of joint, the bolts of such connection joints fractured one after another within five years after the factory was completed. Through bolt fracture surface analysis, on-site boom stress and bolt axial force testing, finite element calculation analysis and fatigue strength check, it was revealed that the fracture of this type of joint in the small automobile industrial plant was a fatigue failure. The Monte Carlo method was used to analyze the fatigue reliability of this type of joint which was used in small car production plants. It was pointed out that the fatigue reliability index was lower and the failure probability was higher if merely the static strength was taken into account in the design. It was recommended that such joints should be evaluated for fatigue strength when they are used in automobile production industrial buildings.

Keywords:hanging track; bolt joint; fatigue; reliability

*國(guó)家十三五重點(diǎn)研發(fā)計(jì)劃課題（2016YFC0701303）。

作者簡(jiǎn)介：趙曉青，博士研究生，Email：550688029@qq.com。