高層剪力墻結(jié)構(gòu)溫度應(yīng)力初探
夏 勇 裴若娟
- 摘 要
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夏 勇 （中南建筑設(shè)計院 武漢 430071）裴若娟 （華中理工大學(xué) 武漢 430074）
[提要] 從日照和水化熱兩方面考慮高層剪力墻結(jié)構(gòu)溫度的作用效應(yīng)。通過熱傳導(dǎo)微分方程導(dǎo)出日照作用下非勻質(zhì)材料的差分格式，用數(shù)值方法求解墻體的溫度場分布；考慮一般情況下的水化熱降溫曲線，求得構(gòu)件在水化熱反應(yīng)過程中溫度應(yīng)力的等效溫差。綜合考慮兩者的溫度變化，計算結(jié)構(gòu)的最不利溫度應(yīng)力和組合值。對一個實際的剪力墻結(jié)構(gòu)進行了溫度應(yīng)力全過程計算。
[關(guān)鍵詞] 剪力墻結(jié)構(gòu) 溫度應(yīng)力 熱傳導(dǎo)方程 有限差分法 水化熱反應(yīng)
Two factors are taken into account in the researches on thermal effects on shear waIlI structures: solar radiation and hydration heat. A finite-difference function based on the differential equation governing the heat conduction is deduced to calculate temperature distribution for concrete wall. According to the temperature dropping curves of hydration heat, authors also consider the equivalent temperature variation of thermal stress due to the hydration reaction of the cement. From above, the most dangerous thermal stress is calculated. Finally, the temperature distribution and stress analysis of a high-rise shear wall structure are carried out.
Keywords: shear wall structure, thermal stress; heat conduction equation; finite-difference method; hy-
dration reaction
