- 摘 要
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(中國中元國際工程有限公司， 北京 100089)
摘要: 通過研究不同開洞區(qū)域的帶 50%穿層柱的框架結(jié)構(gòu)抗震性能，提出一種基于框架柱地震剪力分擔比例的設計調(diào)整方法，并進行了調(diào)整前后結(jié)構(gòu)彈性及彈塑性抗震性能的對比分析。 由于樓板開洞形成穿層柱，穿層柱抗側(cè)剛度偏小，按照計算剛度分擔的剪力偏小，一旦進入屈服，穿層柱彈塑性開展較快。 彈性設計階段，應通過調(diào)整梁柱截面，滿足小震作用下設計指標要求，使穿層柱承擔的樓層剪力比例不低于 40%，宜控制在 45%左右，結(jié)構(gòu)的彈塑性性能滿足預期要求。 按照普通柱與穿層柱的地震剪力分擔相當?shù)脑瓌t，進行穿層柱的設計地震作用調(diào)整，提高了穿層柱的彈塑性承載力，增加了穿層柱在彈塑性階段的抗側(cè)貢獻，改善了普通柱的破壞程度。
關鍵詞: 穿層柱；框架結(jié)構(gòu)；抗震設計；性能評估
中圖分類號:TU318 文獻標志碼:A 文章編號:1002￣848X(2022)01￣0063￣07
DOI:10. 19701 / j. jzjg. 20200417
Study on seismic design of RC frame structure with cross￣floor columnsaccounting for 50% of total columns
WU Hanfu， FU Yangqiang， ZHANG Song， HAN Mingming
(China IPPR International Engineering Co.， Ltd.， Beijing 100089， China)
Abstract: By studying the seismic performance of the frame structure with cross￣floor columns accounting for 50% of totalcolumns in different opening areas， the design method based on the seismic shear sharing ratio of frame columns wasproposed， and the elastic and elastic￣plastic seismic performances of the structure before and after the design was comparedand analyzed. Because of the opening in the floor slab to form cross￣floor columns， the lateral stiffness of the cross￣floorcolumn is small， and so was the shear force shared. Once the cross￣floor column yields， the elastic￣plastic developmentspeed of the cross￣floor column is fast. In the elastic design stage， the beam column section should be designed to meet thedesign index requirements under the frequent earthquake， so that the floor shear ratio borne by the cross￣floor column is notless than 40% and controlled at about 45%， and the elastic￣plastic performance of the structure meets the expectedrequirements. According to the principle that the seismic shear force of the common column is equal to that of thecross￣layer column， the design earthquake action of the cross￣floor column was adjusted， which improves the elastic￣plasticbearing capacity， increases the seismic contribution of the cross￣floor column in the elastic￣plastic stage， and improves thedamage of the common column.
Keywords:cross￣floor column；frame structure；seismic design；performance evaluation
第一作者:吳漢福，學士，教授級高級工程師，一級注冊結(jié)構(gòu)工程師，主要從事結(jié)構(gòu)設計及技術質(zhì)量管理工作，Email:wuhanfu@ippr. net。
[引用本文] 吳漢福，付仰強，張松，等. 帶 50%穿層柱的 RC 框架結(jié)構(gòu)抗震設計研究[J]. 建筑結(jié)構(gòu)，2022，52(1):63￣69. WU Hanfu，F(xiàn)U Yanqqiang，ZHANG Song，et al. Study on seismic design of RC frame structure with cross￣floorcolumns accounting for 50% of total columns[J]. Building Structure，2022，52(1):63￣69.
