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王來(lái)貴¹，  李磊¹，周永發(fā)²
(1 遼寧工程技術(shù)大學(xué)力學(xué)與工程學(xué)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(jié)構(gòu)拉張破裂的破壞規(guī)律，揭示材料破裂的機(jī)理。本文應(yīng)用有限元材料破裂過程分析系統(tǒng)對(duì)混凝土橋墩在偏心加載條件下的受力、變形與內(nèi)部裂縫萌生、擴(kuò)展及破裂的全過程進(jìn)行數(shù)值模擬。模擬結(jié)果顯示，橋墩結(jié)構(gòu)受拉應(yīng)力作用發(fā)生破裂而形成不連續(xù)面，并且拉應(yīng)力作用下不斷形成破裂面，結(jié)構(gòu)形式相應(yīng)發(fā)生演化，并導(dǎo)致應(yīng)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(xiàn)試驗(yàn)結(jié)果較接近，對(duì)于深入了解T型橋結(jié)構(gòu)的聯(lián)合受力規(guī)律具有一定的參考價(jià)值．
[關(guān)鍵詞] 橋結(jié)構(gòu)；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