| 预应力混凝土结构非线性地震反应分析 |
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| 引用本文： | 胡文发,黄鼎业.预应力混凝土结构非线性地震反应分析[J].地震工程与工程振动,2000,20(2):44-50. |
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| 作者姓名： | 胡文发 黄鼎业 |
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| 作者单位： | 同济大学建设管理与房地产系!上海200092(胡文发)，同济大学预应力研究所!上海200092(黄鼎业) |
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| 摘 要： | 本文针对预应力混凝土与普通混凝土不同的受力特点，提出了适合于分析预应力混凝土结构抗震性能的非线性有限元模型。模型首先将混凝土结构离散为杆单元，然后对各杆单元按分层组合原理分成许多混凝土层、预应力钢筋层和普通钢筋层，计算混凝土分层单元、预应力钢筋和普通钢筋的应力和应变，最后，根据钢筋与混凝土之间的粘结－滑移关系高速钢筋变形，根据混凝土弹性模量调整结构及杆单元变形，通过对普通混凝土构件和三个预应力混凝
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| 关 键 词： | 地震反应 有限元 非线性分析 预应力混凝土结构 |
| 文章编号： | 1000-1301(2000)02-0044-07 |
Analysis for nonlinear seismic response of prestressed concrete structures |
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| HU Wen -fa, HUANG Ding -ye.Analysis for nonlinear seismic response of prestressed concrete structures[J].Earthquake Engineering and Engineering Vibration,2000,20(2):44-50. |
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| Authors: | HU Wen -fa HUANG Ding -ye |
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| Abstract: | In view of the different mechanical performance between prestressed concrete and reinforced concrete, a nonlinear flnite element model, which is suitable to analysis of seismic performance of prestressed concrete, is proposed. In this model, a concrete structure would first be divided into bar units. Then each bar unit would be separated into rnany concrete tiers, tendon tiers and steel bar tiers. According to the separating and combining method,stresses and strains of concrete tiers, tendons and steel bars could be calculated. Finally deformation of steel would be adjusted according to bond-slip relationship between steel and concrete, and deformation of the structure or bar units would be adjusted when the elastic moduli of concrete changes. Hysteresis loops of a reinforced concrete member and three prestressed concrete members are compared, which proves that this model is feasible. By theway, some parameters of this model are adjusted. The seismic responses of a four-storey prestressed concrete frame under-different earthquake excitations are calculated and compared, which shows that the seismic performance of prestressed concrete structures designed on the basis of current seisndc code is acceptable and satisfactory. |
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| Keywords: | prestressed concrete seismic response finite element nonlinear analysis |
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