鋼筋混凝土偏心受壓柱徐變分析
張宇鵬1，曹 燕2，黃達(dá)海3
- 摘 要
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（1 北京市建筑工程研究院有限責(zé)任公司，北京100039；2 國家知識(shí)產(chǎn)權(quán)局專利局專利審查協(xié)作北京中心，北京 100190；3 北京航空航天大學(xué)，北京 100191）[摘要] 基于彈性徐變理論，研究了對(duì)稱配筋的鋼筋混凝土偏心受壓柱中，鋼筋和混凝土的應(yīng)力-應(yīng)變?cè)隽筷P(guān)系和遞推公式；采用數(shù)值方法計(jì)算了考慮加、卸載后鋼筋和混凝土應(yīng)力-應(yīng)變的變化過程；分析了偏心距、配筋率、加載齡期及卸載時(shí)間等因素對(duì)長(zhǎng)期荷載下鋼筋混凝土偏心受壓柱徐變特性和卸載后混凝土應(yīng)力的影響規(guī)律。[關(guān)鍵詞] 鋼筋混凝土; 偏心受壓柱; 混凝土徐變; 卸載中圖分類號(hào)：TU375 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)S2-0532-04作者簡(jiǎn)介：張宇鵬，碩士，中級(jí)工程師，國家一級(jí)注冊(cè)結(jié)構(gòu)工程師，國家一級(jí)注冊(cè)建造師， Email：29815435@qq.com。Creep analysis of reinforced concrete eccentric compression columnsZhang Yupeng1, Cao Yan2, Huang Dahai3(1 Beijing Building Construction Research Institute, Beijing 100039; 2 Patent Examination Cooperation Center of the Patent Office, SIPO, Beijing 100190; 3 Beihang University, Beijing 100191, China)Abstract: Based on the elastic-creep theory, this paper analyses the relationship of stress-strain increment and recurrence formula of reinforcement and concrete in reinforced concrete eccentric compression columns. The stress-strain changing process considering repeated loading is calculated through numerical method. The effects of long-time loading on creep behavior of RC eccentric compression columns and concrete stress after unloading is studied. Many factors are considered in the study, that include the eccentricity, the reinforcement ratio, the age of concrete at loading, and the duration of loading.Keywords: reinforced concrete; eccentric compression columns; concrete creep; unload
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