人力資源開發(fā)與管理的論文中英文摘要-文庫吧
2024-11-08 23:37 本頁面
【正文】 地上15條地震動作用下的非線性動力時程分析和不同荷載模式下的靜力彈塑性分析，求解了結(jié)構(gòu)的幾個重要反應(yīng)指標(biāo)，包括能力曲線、頂端位移角及層間位移角、以及塑性鉸分布，探討了不同荷載模式對鋼筋混凝土低層和高層結(jié)構(gòu)反應(yīng)指標(biāo)的影響程度，建議了適用于鋼筋混凝土低層和高層結(jié)構(gòu)的Pushover荷載模式。首先采用模態(tài)Pushover分析計算結(jié)構(gòu)各階模態(tài)單自由度體系的特征參數(shù)，然后計算結(jié)構(gòu)各階模態(tài)單自由度體系對應(yīng)的滯回耗能，并將其進(jìn)行線性組合進(jìn)而確定結(jié)構(gòu)的滯回耗能，并與結(jié)構(gòu)通過動力時程分析計算得到的滯回耗能進(jìn)行比較，從而給出一種物理概念簡單、計算操作方便的確定結(jié)構(gòu)滯回耗能的方法。另外，為了便于計算結(jié)構(gòu)各階模態(tài)單自由度體系的滯回耗能，本文選取了國內(nèi)外四類場地土上總計320條強(qiáng)震記錄作為地震記錄數(shù)據(jù)庫，在統(tǒng)計分析的基礎(chǔ)上，給出了對應(yīng)于不同場地土和不同烈度區(qū)的單自由度體系等強(qiáng)度滯回耗能設(shè)計譜。關(guān)鍵詞：Pushover方法；能力譜方法；模態(tài)Pushover分析；水平荷載模式；滯回耗能Improvements on Pushover Analysis ProcedureMao JianmengABSTRACTHow to select the adequate procedure for seismic analysis and design of structures is an essential problem in earthquake engineering the development of Performancebased Seismic Design, Pushover Analysis procedure has attracted many scientists’ and engineers’ attentions and been widely used for its conceptual simplicity and putational overe the limitation of Pushover Analysis procedure, some improvements on this procedure were performed in this paper, including the improvement on Modal Pushover Analysis, the revision of target displacement from the pushover analysis for reinforced concrete frame, the correlation of structural response parameters with different lateral load patterns, and the putation of the structural hysteretic energy based on Modal Pushover Analysis main contents of this dissertation are as is an important assumption that the pushover load patterns keep unchanged even after the structure yields in Modal Pushover Analysis the adoption of invariable lateral force distributions in the Modal Pushover Analysis procedure, an improved modal pushover analysis procedure is presented in this paper to estimate the seismic demands of structures, considering the redistribution of inertia is suggested that after establishing the idealized bilinear curve, a pushover analysis is once again conducted for the first mode in two phases: before and after the structure the two phases, the structural elastic natural mode and the floor displacement vector at the initial yielding point are used as the displacement shape vector, approximately estimating method of displacement of reinforced concrete(RC)frame from static pushover analysis(POA)is developed with that from nonlinear response history analysis(RHA).Based on the statistic analyses of the RHA and POA results for five RC frames with different height under 80 ground motions recorded at four site conditions, the revised formula of displacements from POA is presented from results show that the site soil condition has an importa
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