發(fā)布時(shí)間：2019-04-21 06:42

【摘要】：為了制定合理的水管冷卻方案,基于ANSYS有限元仿真方法,計(jì)算了厚倒丁字型高強(qiáng)度混凝土結(jié)構(gòu)在無水管冷卻、單排水管冷卻及雙排水管冷卻工況下的溫度、應(yīng)力變化規(guī)律,探討其施工期水管冷卻溫控防裂效果。結(jié)果顯示:采用單排或雙排水管冷卻方案后,高強(qiáng)度混凝土墩墻內(nèi)外溫差分別降低了42%和90%,外表面早期應(yīng)力分別減小了40%和80%以上,內(nèi)部后期應(yīng)力分別減小了20%和75%以上�？梢�,雙排水管的冷卻效果明顯優(yōu)于單排水管,可有效避免混凝土墩墻開裂風(fēng)險(xiǎn)。結(jié)果表明,在厚倒丁字型高強(qiáng)度混凝土結(jié)構(gòu)施工期,冷卻水管布置應(yīng)較密集,水管間距以1 m以內(nèi)為佳。
[Abstract]:In order to make a reasonable cooling scheme of water pipe, the temperature and stress of thick inverted T-shaped high strength concrete structure under the conditions of no pipe cooling, single drain pipe cooling and double drainage pipe cooling are calculated based on the ANSYS finite element simulation method. The effect of water pipe cooling temperature control and crack prevention during construction is discussed. The results show that the temperature difference between inside and outside of the high strength concrete pier wall decreases by 42% and 90% respectively, and the early stress on the outer surface decreases by more than 40% and 80% respectively after adopting the cooling scheme of single row or double drain pipe. The internal post-stress decreases by more than 20% and 75% respectively. It can be seen that the cooling effect of double drains is obviously better than that of single drains, which can effectively avoid the risk of concrete pier wall cracking. The results show that during the construction period of thick inverted T-shaped high strength concrete structure, the arrangement of cooling pipes should be dense and the spacing of pipes should be less than 1 m.
【作者單位】： 浙江省水利水電勘測設(shè)計(jì)院;
【分類號】：TV544

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本文編號：2461946