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忻鼎康 滕裕珠 施榮華
（上海建筑科學(xué)研究院預(yù)應(yīng)力所 200032）[提要] 使用有限元仿真技術(shù)計算了上?？萍拣^地下室超長弧形墻體的當(dāng)量溫度應(yīng)力分布規(guī)律和預(yù)應(yīng)力應(yīng)力場分布規(guī)律。分析表明，對于超長弧形墻體，預(yù)應(yīng)力產(chǎn)生的應(yīng)力場可以抵消由混凝土收縮和溫度產(chǎn)生的部分拉應(yīng)力，對阻止墻體收縮裂縫和溫度裂縫出現(xiàn)是有效的。仿真計算是在ANSYS程序上完成的，預(yù)應(yīng)力筋和混凝土之間相互作用的有限元約束處理方法可以推廣應(yīng)用于其它預(yù)應(yīng)力構(gòu)件的仿真計算。
[關(guān)鍵詞] 仿真計算 裂縫 當(dāng)量溫度 地下室外墻 預(yù)應(yīng)力 有限元With use of the finite element computation,the equivalent temperature stress distribution law and the prestress distribution law of overlong exterior wall of basement are acquired. The analysis shows that the stress produced by prestress can, to a great extent, counteract the tension stress caused by shrinkage of concrete and change of temperature. It is also effective to prevent the crack caused by shrinkage ancl temperature.The simulated-computation is completed based on the ANSYS program. The restriction method of finite element to deal with the interaction between the prestress tendon and concrete can be referred to the simulated-computation of other prestress members.
Keywords: simulated-computation; crack; equivalent temperature; exterior wall; basement; prestress; finite element
