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(1.中廣國際建筑設(shè)計(jì)研究院，北京100034；2.北京市建筑工程研究院，100039)
［提要］介紹了某辦公樓地下室加層改造的框架柱加固及雙向預(yù)應(yīng)力樓板設(shè)計(jì)方案，并利用ANSYS有限元分析軟件對該房屋邊緣構(gòu)件對加層樓板中預(yù)應(yīng)力建立的影響進(jìn)行了分析和探討。結(jié)果表明，對于預(yù)應(yīng)力板柱結(jié)構(gòu)，邊緣構(gòu)件對與之平行的預(yù)應(yīng)力的建立影響較大。
［關(guān)鍵詞］預(yù)應(yīng)力；板柱結(jié)構(gòu)；有限元分析；邊緣構(gòu)件
Reconstruction Design and Finite Element Analysis of Prestressing Effects of a Newadded Underground Floor of an Office Building/Gao Huizong1,Liu Hang2,Wu Wenqi2（1 Zhongguang Building Design & Research Institute International, Beijing 100034,China;2 Beijing Building Construction Research Institute, Beijing 100039,China）
Abstract:Reconstruction design of twoway prestressed slabs and strengthening of frame columns of a newadded underground floor of an office building are introduced. ANSYS finite element analysis program is used to analyze the prestressing effects of the slab due to boundary members. It is shown that for prestressed slabcolumn structure, the boundary members will greatly influence the parallel prestressing force in the slab.
Keywords:prestress; slabcolumn structure; finite element analysis; boundary members