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高維成 沈世釗
（哈爾濱工業(yè)大學(xué) 150090）[提要] 對預(yù)應(yīng)力箱型樓蓋結(jié)構(gòu)的結(jié)構(gòu)形式、構(gòu)造特點及施工方式等進(jìn)行研究，同時運用SAP91程序及彈塑性有限元程序?qū)?4m×24m箱型樓蓋算例進(jìn)行力學(xué)性能分析，從而充分證實預(yù)應(yīng)力箱型樓蓋結(jié)構(gòu)是一種合理、經(jīng)濟(jì)的空間結(jié)構(gòu)體系，可滿足大跨度建筑的需要。彈塑性分析結(jié)果表明，對于大跨度預(yù)應(yīng)力混凝土樓蓋結(jié)構(gòu)，考慮彈塑性影響十分必要。
[關(guān)鍵詞] 箱型樓蓋 結(jié)構(gòu)形式 力學(xué)性能 薄膜內(nèi)力 彎矩 彈塑性The structural form, character and the construction technology of the prestressed box floor frame were studied. Mean-while, the SAP91 and the elastic-plastic finite-element program were applied to the calculating analysis of the 24m×24m box floor frame. As a result, it has been fully verified that the prestressed box floor frame system is a kind of reasonable and economical space structural system and meets the demands of large span floor frame. The analysis indicates that it is very important to consider the elastic-plastic on the large span prestrssed concrete floor frame.
Keywords: box floor; structural form; mechanics properties; membrane internal force; bending moment; elastic-plastic
