解放军理工大学学报（自然科学版）
解放軍理工大學學報（自然科學版）
해방군리공대학학보（자연과학판）
JOURNAL OF PLA UNIVERSITY OF SCIENCE AND TECHNOLOGY(NATURAL SCIENCE EDITION)
2013年
6期
641-647
,共7页
型钢混凝土%转换柱%配钢率%拔出效应%延伸高度
型鋼混凝土%轉換柱%配鋼率%拔齣效應%延伸高度
형강혼응토%전환주%배강솔%발출효응%연신고도
steel reinforced concrete%transfer columns%steel ratio%pull-out effect%ductility
为确定 SRC-RC 竖向混合结构中转换柱的型钢合理延伸高度，保证转换柱具有良好的抗震性能，通过16根试件的低周反复荷载试验，对具有不同型钢延伸高度的转换柱进行了理论分析与性能研究。分析得出了能保证柱底型钢翼缘屈服的型钢最小延伸高度计算公式，保证柱底型钢受弯屈服。试件的位移延性系数随型钢延伸长度的增加呈现先升后降的规律，型钢剪力则表现截然相反的变化规律。型钢截断处的试件弯矩导致上部柱体与下部柱体在该截面存在相互脱离的趋势，纵向受力钢筋在这样的相互转动作用下产生了被拔出的作用效果。配钢率越大，型钢截断处的试件弯矩越大，则纵筋的拔出效应越明显。转换柱的反弯点大致位于0.6倍的柱高，反弯点至柱根部的距离即为型钢在转换柱中的合理延伸高度。型钢延伸高度达到反弯点时，型钢截断处的试件弯矩最小，试件损伤破坏较轻，型钢截断区的内力畸变影响区远离柱顶和柱底，相应区域的混凝土能够保持较好完整性，确保塑性铰具有良好的转动能力，转换柱具有更好的变形能力和抗震防灾能力。
為確定 SRC-RC 豎嚮混閤結構中轉換柱的型鋼閤理延伸高度，保證轉換柱具有良好的抗震性能，通過16根試件的低週反複荷載試驗，對具有不同型鋼延伸高度的轉換柱進行瞭理論分析與性能研究。分析得齣瞭能保證柱底型鋼翼緣屈服的型鋼最小延伸高度計算公式，保證柱底型鋼受彎屈服。試件的位移延性繫數隨型鋼延伸長度的增加呈現先升後降的規律，型鋼剪力則錶現截然相反的變化規律。型鋼截斷處的試件彎矩導緻上部柱體與下部柱體在該截麵存在相互脫離的趨勢，縱嚮受力鋼觔在這樣的相互轉動作用下產生瞭被拔齣的作用效果。配鋼率越大，型鋼截斷處的試件彎矩越大，則縱觔的拔齣效應越明顯。轉換柱的反彎點大緻位于0.6倍的柱高，反彎點至柱根部的距離即為型鋼在轉換柱中的閤理延伸高度。型鋼延伸高度達到反彎點時，型鋼截斷處的試件彎矩最小，試件損傷破壞較輕，型鋼截斷區的內力畸變影響區遠離柱頂和柱底，相應區域的混凝土能夠保持較好完整性，確保塑性鉸具有良好的轉動能力，轉換柱具有更好的變形能力和抗震防災能力。
위학정 SRC-RC 수향혼합결구중전환주적형강합리연신고도，보증전환주구유량호적항진성능，통과16근시건적저주반복하재시험，대구유불동형강연신고도적전환주진행료이론분석여성능연구。분석득출료능보증주저형강익연굴복적형강최소연신고도계산공식，보증주저형강수만굴복。시건적위이연성계수수형강연신장도적증가정현선승후강적규률，형강전력칙표현절연상반적변화규률。형강절단처적시건만구도치상부주체여하부주체재해절면존재상호탈리적추세，종향수력강근재저양적상호전동작용하산생료피발출적작용효과。배강솔월대，형강절단처적시건만구월대，칙종근적발출효응월명현。전환주적반만점대치위우0.6배적주고，반만점지주근부적거리즉위형강재전환주중적합리연신고도。형강연신고도체도반만점시，형강절단처적시건만구최소，시건손상파배교경，형강절단구적내력기변영향구원리주정화주저，상응구역적혼응토능구보지교호완정성，학보소성교구유량호적전동능력，전환주구유경호적변형능력화항진방재능력。
Mechanical behavior of transfer column in SRC-RC hybrid structure was analyzed based on exper-iment of 1 6 specimens under low cyclic reversed loading,which is mainly used to confirm the rational ex-tension length of the shape steel in transfer column and ensure the seismic performance of the transfer col-umn.Minimum extension length of the shape steel was confirmed and the calculation method was put for-ward,which is mainly used to make sure the bend yielding of the shape steel at bottom section.Displace-ment ductility changes with the extension length increment of the shape steel,enhancing at first and then reducing,and reaching peak value when the extension length gets close to three fifths of column height. But relationship of the steel shear force and the steel extension length is at opposite poles.Moment at sec-tion of steel discontinuity leads to pull-out effect of the steel bars.The effect promotes with the increment of the moment and the section ratio of the shape steel.Contraflexure point of the transfer column at three fifths of column height,and the distance of contraflexure point to the bottom is the rational extension length of the shape steel.If the shape steel extends to contraflexure point,the section moment of the steel dis-continuous section will reach the minimum,damage of concrete will damp down,and deformation ability and the mechanical behavior of the transfer column will be better.
