- 摘 要
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（1 華南理工大學(xué)土木與交通學(xué)院， 廣州 510641； 2 亞熱帶建筑科學(xué)國家重點(diǎn)實驗室， 廣州 510641； 3 恒大地產(chǎn)集團(tuán)， 深圳 518000）
［摘要］通過SAP2000，基于影響面理論對無梁樓蓋結(jié)構(gòu)進(jìn)行了活載不利布置的研究。分析采用了網(wǎng)格法和板帶分塊法，板帶分塊法在滿足精度要求的基礎(chǔ)上，計算效率提高了88-10%。研究結(jié)果表明，當(dāng)活載與恒載設(shè)計值的比值η增大時，活載不利布置與滿載下板帶最大彎矩設(shè)計值的比值λ將增大。當(dāng)η等于1-5時，柱上板帶的最大λ達(dá)到1-35，跨中板帶的最大λ達(dá)到1-63，因而需在結(jié)構(gòu)設(shè)計中考慮λ的影響。對于等跨、規(guī)則平板結(jié)構(gòu)，提出了可供工程簡化計算的η-λ關(guān)系圖表。在按滿載對結(jié)構(gòu)進(jìn)行分析后，可參考該圖表得到λ對滿載彎矩進(jìn)行放大，以考慮活載不利布置的影響。
［關(guān)鍵詞］無梁樓蓋； 影響面理論； 活載不利布置
中圖分類號：TU312文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)15-0098-06
Study on unfavorable living load distribution of flat floor based on influence surface theory
Chen Qingjun1,2, Peng Zhangfeng1, Hou Jiajian3, Ye Jiabin1, He Yongpeng1
(1 School of Civil and Transportation Engineering, South China University of Technology, Guangzhou 510641, China;2 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China;3 Evergrande Real Estate Group, Shenzhen 518000, China)
Abstract:Based on the influence surface theory, the unfavorable live load distribution of flat slab structure was investigated by SAP2000. The grid method and strip block method were adopted in the analysis. The results show that strip block method can improve the computational efficiency by 88-10% on the basis of satisfying the accuracy specification in engineering. The results show that with the increase of the ratio η between live load and dead load, the ratio λ, the maximum bending moment of the strip, between unfavorable live load distribution and full load increases gradually. When η equals to 1-5, the maximum λ on column strip is 1-35, and the maximum λ on middle strip is 1-63, so it is necessary to consider the influence of λ in the structural design. For regular flat slab structures with equal spans, a η-λ relation chart for simplified engineering calculation is presented. After analyzing the structure according to the full load, λ can be obtained by referring to the chart to enlarge the bending moment of the full load in order to consider the influence of the unfavorable live load distribution.
Keywords:flat slab; influence surface theory; unfavorable live load distribution
*廣東省自然科學(xué)基金資助項目（2017A030313263），華南理工大學(xué)亞熱帶建筑科學(xué)國家重點(diǎn)實驗室自主研究課題項目（2018ZC11）。
作者簡介：陳慶軍，博士，副教授，Email: qjchen@scut.edu.cn。
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