高烈度地震區(qū)電廠側(cè)煤倉間結(jié)構(gòu)靜力彈塑性分析
周 霞，馬 濤
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（河北省電力勘測設(shè)計研究院，石家莊 050031）[摘要] 側(cè)煤倉是火力發(fā)電廠內(nèi)重要建筑，且結(jié)構(gòu)復雜，受工藝專業(yè)布置限制，側(cè)煤倉結(jié)構(gòu)質(zhì)量和剛度分布很不規(guī)則，存在明顯的薄弱層，因此，高烈度地震區(qū)側(cè)煤倉結(jié)構(gòu)的抗震設(shè)計顯得尤為重要，對該類結(jié)構(gòu)進行罕遇地震作用下的彈塑性變形分析是必要的。運用Pushover方法對位于高烈度地震區(qū)的某電廠鋼筋混凝土側(cè)煤倉結(jié)構(gòu)進行彈塑性分析，通過考查該結(jié)構(gòu)塑性鉸出現(xiàn)的位置及順序、彈塑性層間位移角，驗證了其在罕遇地震下的抗震性能。結(jié)果標明，該結(jié)構(gòu)第一批塑性鉸出現(xiàn)在梁端，符合“強柱弱梁”要求，彈塑性層間位移角符合規(guī)范要求。本文結(jié)果可為今后高烈度地區(qū)鋼混結(jié)構(gòu)側(cè)煤倉設(shè)計提供參考。[關(guān)鍵詞] 側(cè)煤倉間; Pushover; 彈塑性分析; 塑性鉸中圖分類號：TU352.1 文獻標識碼：A 文章編號：1002-848X(2013)S2-0406-05Static elastoplastic analysis of boiler-side bunker structures of power plant in high-intensity seismic areasZhou Xia, Ma Tao(Hebei Electric Power Design Research & Institute, Shijiazhuang 050031, China)Abstract: The boiler-side bunker is an important building in coal-fired power plants, which is a complex structure and restricted by technology professional arrangement. The quality and rigidity distribution of the boiler-side bunker are irregular, resulting in obvious weak layers. Therefore, the seismic design of boiler-side bunker structure in high earthquake intensity region is of great importance. It is necessary to analyze the elastic-plastic deformation of boiler-side bunkers under severe earthquake. Pushover analysis method is used to realize elastic-plastic analysis on a reinforced concrete boiler-side bunker in high earthquake intensity region. It verifies the seismic performance of the structure under severe earthquake by studying the position and order of plastic hinge, as well as elastic-plastic inter-story drift angle. The results indicate that the first batch of plastic hinge on the structure appears on the beams-end, conforming to the requirements of the "strong column and weak beam". The elastic-plastic inter-story drift angle also conforms to the specification requirements. In the future, the paper results can be used as reference for the design of reinforced concrete boiler-side bunkers in high earthquake intensity region.Keywords: side bunker bay; Pushover; elastic - plastic analysis; plastic hinge
