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王來貴1， 李磊1，周永發(fā)2
(1 遼寧工程技術大學力學與工程學院，阜新123000; 2 北京飛箭軟件有限公司，北京100086)[摘要] 為了研究結構拉張破裂的破壞規(guī)律，揭示材料破裂的機理。本文應用有限元材料破裂過程分析系統(tǒng)對混凝土橋墩在偏心加載條件下的受力、變形與內部裂縫萌生、擴展及破裂的全過程進行數(shù)值模擬。模擬結果顯示，橋墩結構受拉應力作用發(fā)生破裂而形成不連續(xù)面，并且拉應力作用下不斷形成破裂面，結構形式相應發(fā)生演化，并導致應力狀態(tài)改變。隨著載荷在不同位置的加載，最終確定裂縫的分布位置。數(shù)值模擬與文獻試驗結果較接近，對于深入了解T型橋結構的聯(lián)合受力規(guī)律具有一定的參考價值．
[關鍵詞] 橋結構；偏心加載；損傷破裂；數(shù)值模擬Numerical simulation of damaging fracture of T-bridge structure under partiality Joading
Wang Laigui1, Li Lei1, Zhou Yongfa2
(1 School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China; 2 Beijing FEGEN Software Co. Ltd., Beijing 100086, China)Abstract: In order to study the failure law of the tensional fiacture of the structure, and reveal the mechanism of the rupture ofthe material.The process analysis system to that concrete pier applying finite element method material breaking increases energy for be loaded with lower accepting of condition in partiality, deformation and the inside rift conceive, the entire proceeding go along numerical value extended and breaking imitates. The structure simulating result display, the pier is pulled the strain effect happening brealang to form discontinuous face, is pulled soft and floury and taking form unceasingly under strain effect breaking, the structure form acts in responses evolution happened, and lead to strain state change. The loading being unlike location with loading. the distribution location ascertaining a rift ultimately, The value simulation and the literature test result are close, Regarding understood thoroughly the T bridge structure of the union stress rule has certain reference value.
Keywords: Bridge structure; Partiality loading; damaging fracture; Numerical simulation;FEPG
