- 摘 要
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（1 華南理工大學(xué) 廣州 510640；2 廣州安德建筑構(gòu)件有限公司 511430）
【提要】 鋼筋混凝土管片住驚盾埂寬道最基本的結(jié)構(gòu)單元，其承載力影響管片環(huán)的整體性能。接頭對管片環(huán)有削弱作用，使得對接頭力學(xué)行為的分析顯得尤為重要。通過對盾構(gòu)隧道管片接頭進行精細的三維有限元分析，得到接頭的極限荷載及極限荷載下的應(yīng)力、裂縫分布。研究發(fā)現(xiàn)，正彎矩作用下的接頭強度取決于接頭的局部強度；接頭極大降低了管片環(huán)的整體承載能力；螺栓等連接件與管片混凝土之間的強度匹配也影響了管片接頭強度。
【關(guān)鍵詞】 盾構(gòu)隧道 管片接【 三維印哭元分析
3D FEM Analysis on Segment Joints of Shield Tunnel/Chen Junsheng1, Mo Haihong1, Li Zhendong2(1 Dept. of Civil Engineering, South China University of Technology, Guangzhou 510640, China; 2 Guangzhou on Track Construction Precast Products Co.,Ltd., Guangzhou 511430, China)
Abstract:RC segments are the basic structure units in shield tunnel, and their bearing capacity influences the segment rings integral performance. The weakening effect of segment joints on the segment rings makes the joints mechanical behavior analysis important. Through the elaborate 3D FEM analysis, the ultimate loading of segment joints, the relevant stress and cracks distribution are obtained. The results indicate that the segment joints local bearing capacity determines the integral positive bending bearing capacity of segment joints,and
the segment joints obviously reduce the integral bearing performance.
Keywords:reinforcement concrete; shield tunnel; segment joints; finite element analysis
