- 摘 要
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(廣東省建筑設(shè)計研究院，廣州510010)
［提要］廣州珠江新城核心區(qū)市政交通工程底板屬于大體積、超長混凝土結(jié)構(gòu)，控制水泥水化熱溫升、防止混凝土出現(xiàn)有害溫度裂縫是設(shè)計與施工中的關(guān)鍵問題。選取混凝土后澆帶之間的典型結(jié)構(gòu)單元，運(yùn)用ANSYS軟件，分析了60d養(yǎng)護(hù)期內(nèi)底板溫度、應(yīng)力的分布和變化規(guī)律，深入探討后澆帶間距、環(huán)境溫度、入槽溫度、養(yǎng)護(hù)方式和養(yǎng)護(hù)時間等影響因素，在此基礎(chǔ)上提出了控制水化熱溫升和裂縫的若干具體措施。
［關(guān)鍵詞］底板；溫度場；應(yīng)力場；膨脹劑；仿真
Analysis on Early Ages’ Stress in Foundation Slab of Infrastructure & Transport Project in Zhujiang New Town Core Area/Deng Hanrong, Guo Kai, Jiang Yunlin (The Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)
Abstract:Foundation slab of Infrastructure & Transport Project of Guangzhou Zhujiang New Town Core Area belongs to mass and supe-long concrete structure. The key problems in design and construction include how to control the temperature-rise caused by cement hydration heat and avoid concrete temperature cracks. Using ANSYS software, the distribution and variation disciplines of a typical structure element between post-pouring strips during 60 days curing period are studied. Furthermore, the influencing factors such as space between post-pouring strips, air temperature, initial temperature, curing methods and curing duration are researched. Based on these research results, some practical measurements for controlling temperature-rise and cracks are proposed.
Keywords: foundation slab; temperature field; stress field; expansion agent; simulation
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