本文選題：型鋼混凝土柱 + 復(fù)合受扭　； 參考：《建筑結(jié)構(gòu)學(xué)報》2017年11期

【摘要】：為研究復(fù)合受扭型鋼混凝土柱的抗震性能,進(jìn)行了11個復(fù)合受扭型鋼混凝土構(gòu)件和1個作為對比的復(fù)合受扭鋼筋混凝土構(gòu)件的擬靜力試驗,研究配鋼形式、軸壓比、扭彎比、混凝土強度、配鋼率和配箍率等對構(gòu)件抗震性能的影響。結(jié)果表明:復(fù)合受扭型鋼混凝土構(gòu)件受力全過程經(jīng)歷未裂階段、帶裂縫工作階段和破壞階段;構(gòu)件的破壞形態(tài)有扭型破壞和彎扭型破壞兩種;軸壓比為0.1較其為0.2的構(gòu)件、扭彎比為0.5較其為1.0的構(gòu)件、以及箍筋間距75 mm較其為100 mm的構(gòu)件的滯回曲線更為飽滿;11個型鋼混凝土構(gòu)件轉(zhuǎn)角延性系數(shù)的平均值為5.12,其中6個H型鋼混凝土構(gòu)件轉(zhuǎn)角延性系數(shù)的平均值為4.17,5個十字型鋼混凝土構(gòu)件轉(zhuǎn)角延性系數(shù)的平均值為6.27,鋼筋混凝土對比構(gòu)件的轉(zhuǎn)角延性系數(shù)為3.86;隨著加載位移的加大,構(gòu)件的承載力衰減越來越大;相對剛度的退化經(jīng)歷彈性退化、屈服退化和破壞退化階段;等效阻尼比隨著扭率的增大而增大,兩者大致成線性關(guān)系。
[Abstract]:In order to study the seismic behavior of composite steel reinforced concrete columns subjected to torsion, the pseudostatic tests of 11 composite steel reinforced concrete members and 1 composite torsional reinforced concrete members are carried out, and the steel form, axial compression ratio and torsional bending ratio are studied. The influence of concrete strength, steel distribution ratio and hoop ratio on the seismic behavior of members. The results show that the whole process of composite steel reinforced concrete members subjected to torsion goes through the uncracked stage, the working stage with cracks and the failure stage; the failure patterns of composite steel reinforced concrete members are torsional failure and bending and torsional failure, and the axial compression ratio of 0.1 is 0.2. A member whose torsion / bending ratio is 0.5 and which is 1.0, The hysteretic curve of 75 mm stirrups is more full than that of 100 mm, and the average ductility coefficient of 11 steel reinforced concrete members is 5.12, of which the average value of 6 H-section steel reinforced concrete members is 4.17%. The average angle ductility coefficient of cross section steel concrete members is 6.27, and the angle ductility coefficient of reinforced concrete contrast members is 3.86. With the increase of loading displacement, The degradation of relative stiffness goes through the stages of elastic degradation, yield degradation and failure degradation, and the equivalent damping ratio increases with the increase of torsion ratio, and the relationship between them is approximately linear.
【作者單位】： 蘇州科技大學(xué)機械工程學(xué)院;蘇州科技大學(xué)江蘇省結(jié)構(gòu)工程重點實驗室;蘇州科技大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51078249,51478287)
【分類號】：TU352.11;TU398.9

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