unbonded beam 中文意思是什麼
unbonded beam
解釋
無約束梁-
The low - cyclic reversed loading tests of two unbonded partially prestressed concrete frames with different ppr have been carried out. the aseismic behaviors are analyzed and compared, with emphases on failure mechanism, hysteretic property, displacement ductility, energy - dissipation capacity as well as stiffness degeneration, etc. the results show, when designed rationally, the unbonded partially prestressed concrete frames can form beam hinge energy - dissipation machine and total destroy mechanism
通過兩榀不同預應力度的無粘結部分預應力混凝土扁梁框架結構的低周反復荷載試驗，分析研究了無粘結部分預應力混凝土扁梁框架結構的破壞形態、滯回特性、位移延性、耗能能力、承載力及剛度退化等抗震性能。 -
A 21 meter span unbonded prestressed composite beam fabricated from reactive powder concrete ( rfc ) was designed. then the performance and economy of this kind of beams were compared with conventional prestressed beams and steel - concrete composited beams. the results indicated that rfc beams have superior performance
最後，對大跨度（ 21m ）梁，通過三種設計方案結構性能和經濟性等方面的對比，對採用活性粉末混凝土疊合梁的優越性進行了綜合評價。 -
The contents include as follows : the influencing factors of the displacement ductility factor of the unbonded partially prestressed concrete frame structures, such as stirrup reinforcement characteristic value, nominal shear span ratio, axial compression ratio, the appearing order of plastic hinges and partial prestressing ralio ( ppr ) are discussed. the formula of displacement ductility factor of the unbonded partially prestressed concrete frame structures is suggested by regression analysis. with regard to the aseismic design and the request of ductility and energy dissipation, the restriction of the flat - beam / column sectional size and aseismic reinforced design are discussed
本文主要包括以下內容：討論了配箍特徵值、名義剪跨比、軸壓比、塑性鉸出現順序、預應力度等因素對無粘結部分預應力混凝土框架位移延性系數的影響，回歸了考慮影響因素的位移延性系數計算公式；對無粘結部分預應力混凝土扁梁框架結構，闡述了抗震設計對扁梁、柱截面尺寸的要求與限制；對滿足延性和耗能要求的無粘結部分預應力混凝土扁梁控制截面抗震配筋進行了探討；通過對無粘結部分預應力混凝土扁梁梁端的受力分析，改進了以往扁梁梁端扭矩設計值計算公式。 -
Considering the behaviors of unbonded prestressed concrete beams and steel reinforced concrete columns, a kind of nonconforming beam - column element was constructed and the analysis precision was improved. loading and reloading paths were introduced into the constitutive relationship of concrete. it is helpful to the analysis program to trace the full - range mechanical behavior of structures including the descending part and the hysterisis characteristic under cyclic loading
考慮無粘結預應力混凝土梁、型鋼混凝土柱等結構構件的受力特點，構造非協調樑柱單元，提高了分析精度；混凝土的本構關系中，引入卸載路徑和再加載路徑，使得分析程序可以追蹤包括下降段在內的結構全過程力學行為，以及反復荷載下結構的滯回特性。 -
The results show that the performances of precast prestressed beam - to - column concrete connections with unbonded tendons are equal or superior to that of a monolithic connection in terms of ductility and displacement - restoring capacity
結果表明，無粘結預應力裝配式混凝土框架連接具有良好的耗能能力，在延性和變形恢復能力上比現澆連接更優。 -
At the same time, it brings the greater displacement reaction, lower energy - dissipation capacity and badly ductility ability etc. the unbonded partially prestressed concrete flat - beam frame structure has been used in the practice project in our country, but the aseismatic study of this structure is not perfect at present, study on theory is lagged behind the demand of engineering apply. it has important theoretic meaning and applied value to go deep into the examinational study about the prestressed concrete flat - beam frame structures
近年來國內已經開始在實際工程中採用無粘結部分預應力混凝土扁梁框架結構，但是目前對這種結構形式的抗震研究工作還不完善，理論研究已滯後於工程應用的需要，因此深入進行扁梁框架結構的研究，在經濟合理的情況下確保該結構的抗震安全性具有重要的理論意義和應用價值。 -
Based on tests of three moment - resisting beam - column connections under low reversed cyclic loading, this paper inquires into the failure pattern, hysteresis loop curves, displacement - restoring capacity, displacement ductility and energy dissipation of the precast prestressed beam - to - column concrete connections with unbonded tendons
摘要通過三個框架節點在低周反復荷載下的試驗，對無粘結預應力裝配式混凝土框架連接的破壞形態、滯回曲線、變形恢復能力、位移延性、能量耗散等性能進行了研究。 -
Prediction model of ductility of unbonded partially prestressed concrete beam with high strength based on genetic algorithm and neural network
神經網路的無粘結部分預應力高強混凝土梁延性預測模型
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