东南大学学报（自然科学版）
東南大學學報（自然科學版）
동남대학학보（자연과학판）
JOURNAL OF SOUTHEAST UNIVERSITY
2014年
5期
1005-1010
,共6页
后张%无黏结%装配式%框架节点%抗震承载力%预测
後張%無黏結%裝配式%框架節點%抗震承載力%預測
후장%무점결%장배식%광가절점%항진승재력%예측
post-tensioned%unbonded%precast%frame joints%seismic bearing capacity%prediction
为研究后张无黏结装配式框架梁柱节点的抗震性能，提出了一种节点骨架曲线上特征点的计算方法。首先，基于弹性梁的理论和刚体转动原理，详细分析了后张无黏结节点梁端位移的组成，并给出计算位移的通用公式。然后，根据梁端截面在不同临界点（开裂点、线性极限点、混凝土核心区压碎点）的受力特点，计算了各特征点对应的荷载。最后，根据后张无黏结角钢连接节点的转动特征以及角钢在反复拉压荷载下的恢复力模型，得到骨架曲线上特征点的简化计算公式。计算结果与低周往复荷载下节点试验结果吻合较好，由此证明了计算的合理性和正确性。结果表明，该计算方法基于合理的力学概念，可较为准确地预测节点骨架曲线，具有计算简便、适用性广的优点。
為研究後張無黏結裝配式框架樑柱節點的抗震性能，提齣瞭一種節點骨架麯線上特徵點的計算方法。首先，基于彈性樑的理論和剛體轉動原理，詳細分析瞭後張無黏結節點樑耑位移的組成，併給齣計算位移的通用公式。然後，根據樑耑截麵在不同臨界點（開裂點、線性極限點、混凝土覈心區壓碎點）的受力特點，計算瞭各特徵點對應的荷載。最後，根據後張無黏結角鋼連接節點的轉動特徵以及角鋼在反複拉壓荷載下的恢複力模型，得到骨架麯線上特徵點的簡化計算公式。計算結果與低週往複荷載下節點試驗結果吻閤較好，由此證明瞭計算的閤理性和正確性。結果錶明，該計算方法基于閤理的力學概唸，可較為準確地預測節點骨架麯線，具有計算簡便、適用性廣的優點。
위연구후장무점결장배식광가량주절점적항진성능，제출료일충절점골가곡선상특정점적계산방법。수선，기우탄성량적이론화강체전동원리，상세분석료후장무점결절점량단위이적조성，병급출계산위이적통용공식。연후，근거량단절면재불동림계점（개렬점、선성겁한점、혼응토핵심구압쇄점）적수력특점，계산료각특정점대응적하재。최후，근거후장무점결각강련접절점적전동특정이급각강재반복랍압하재하적회복력모형，득도골가곡선상특정점적간화계산공식。계산결과여저주왕복하재하절점시험결과문합교호，유차증명료계산적합이성화정학성。결과표명，해계산방법기우합리적역학개념，가교위준학지예측절점골가곡선，구유계산간편、괄용성엄적우점。
In order to study the seismic bearing capacity of unbonded post-tensioned precast concrete frame beam-to-column joints,a calculation method for the skeleton curve of joints is proposed. First,based on the elastic beam deflection and rigid body rotation theory,the composition of dis-placement of the unbonded post-tensioned joints is analyzed and the common formulas are given. Then,according to the loading features of the section at the beam end at different critical points (crack points,linear critical points,crush points of the core concrete),the corresponding loads are calculated.Finally,according to the rotation features and the hysteretic model of the angle of the un-bonded post-tensioned steel angle joints,the simplified formulas for the characteristic points of the skeleton curve are deduced.The calculation results agree well with the experimental results under re-versed cyclic loading,proving the rationality and correctness of the calculations.The results show that based on reasonable rational mechanics,this calculation method,which is simple and widely used,can predict the skeleton curve of joints accurately.
