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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

27卷

期数:

2010年02期

页码:

61-66

栏目:

出版日期:

2010-06-20

文章信息/Info

Title:

Seismic Performance of Precast Monolithic Concrete Frame Exterior Connections Under Low Cyclic Loading

作者:

窦祖融¹,王怡²,薛伟辰²

1. 万科企业股份有限公司,广东 深圳 518049; 2. 同济大学 建筑工程系,上海 200092

Author(s):

DOU Zu-rong¹, WANG Yi², XUE Wei-chen²

1. China Vanke Co., Ltd., Shenzhen 518049, Guangdong, China; 2. Department of Building Engineering, Tongji University, Shanghai 200092, China

关键词:

装配整体式混凝土框架;  边节点;  低周反复荷载;  延性;  耗能;  滑移

Keywords:

precast monolithic concrete frame;  exterior connection;  low cyclic loading;  ductility;  energy dissipation;  slip

分类号:

TU37

DOI:

-

文献标志码:

A

摘要:

以某18层装配整体式混凝土框架工程为背景,按照“强柱弱梁”、“强节点弱构件”的原则设计试件,取其标准层中典型的普通剪跨比边节点和短剪跨比边节点进行低周反复荷载下的足尺模型试验,对装配整体式混凝土框架边节点的破坏形态、滞回曲线、位移延性、耗能能力、剪切变形进行了系统的研究。结果表明:2个装配整体式混凝土框架边节点在低周反复荷载下均具有较大的安全储备; 普通剪跨比边节点和短剪跨比边节点的破坏形态分别为梁端弯曲破坏和梁端剪切破坏,此时梁端纵向钢筋屈服,而柱内纵向钢筋和核心区内箍筋在整个受力过程中均处于弹性状态; 发生弯曲破坏的普通剪跨比边节点的耗能明显高于发生剪切破坏的短剪跨比边节点的耗能。

Abstract:

Taking an eighteen-story precast monolithic concrete frame engineering as background, designing the specimens in terms of the objective of strong column-weak beam and strong joint-weak element, the full-scale model tests of two different typical shear-span ratio connections with composite beams and cast-in-place columns were carried out under low cyclic loading. Failure mode, hysteresis curve, displacement and ductility, energy dissipation capacity, shear deformation of precast monolithic concrete frame exterior connections were systematically studied. The results show that the two precast monolithic concrete frame exterior connections have large safety margins under low cyclic loading. The connections with normal shear-span ratio fail in bending and short shear-span ratio fail in shearing at the fixed beam ends. The longitudinal steel bars at the fixed beam end yield while the longitudinal steel bars in the column and the joint hoops keep in elastic state. The connections with normal shear-span ratio have better energy dissipation than connections with short shear-span ratio.

参考文献/References:

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2010-05-04
基金项目:国家自然科学基金项目(50878167); 上海市城乡建设和交通委员会科研项目(2009-001-004)
作者简介:窦祖融(1975-),男,江苏南京人,工学博士,E-mail:xuewc@mail.tongji.edu.cn。

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更新日期/Last Update: 2010-06-20