[1]方有珍,李 聪,袁 园,等.钢板组合PEC柱-削弱截面钢梁组合框架抗震试验研究[J].防灾减灾工程学报,2019,39(06):879-887.[doi:10.13409/j.cnki.jdpme.2019.06.001]
 FANG Youzhen,LI Chong,YUAN Yuan,et al.Experimental Research on Seismic Performance of Composite Frame with Steel Plates Reinforced PEC Column and Reduced Sectional Steel Beam[J].Journal of Disaster Prevention and Mitigation Engineering,2019,39(06):879-887.[doi:10.13409/j.cnki.jdpme.2019.06.001]
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钢板组合PEC柱-削弱截面钢梁组合框架抗震试验研究()
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防灾减灾工程学报[ISSN:1672-2132/CN:32-1695/P]

卷:
39卷
期数:
2019年06期
页码:
879-887
栏目:
论文
出版日期:
2019-12-31

文章信息/Info

Title:
Experimental Research on Seismic Performance of Composite Frame with Steel Plates Reinforced PEC Column and Reduced Sectional Steel Beam
文章编号:
1672-2132(2019)06-0879-09
作者:
方有珍 李 聪 袁 园 孙国华
(苏州科技大学土木工程学院, 江苏 苏州 215011)
Author(s):
FANG Youzhen LI Chong YUAN Yuan SUN Guohua
(College of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China)
关键词:
钢板组合截面PEC柱 削弱截面钢梁 组合框架 抗震性能 低周往复荷载试验
Keywords:
PEC column fabricated with steel plates composite section reduced beam section composite frame seismic performance low-cycle reversed loading test
分类号:
TU398
DOI:
10.13409/j.cnki.jdpme.2019.06.001
文献标志码:
A
摘要:
为深入研究PEC柱-钢梁组合框架结构体系的抗震性能,设计了1榀两层单跨钢板组合截面PEC柱-削弱截面钢梁组合框架1:2缩尺试件,并对其进行了低周往复荷载抗震试验。根据实测数据整理,得到了试验滞回特征曲线,并结合试验过程现象记录,分析了试件滞回特性、抗侧刚度退化规律、节点连接性能、耗能与延性和试件破坏模式等力学性能。研究结果表明:试件结构具有较高的承载力和较大的抗侧刚度; 采取梁端截面削弱方式可实现梁端塑性铰位置远离节点区,且端板对穿螺栓连接能有效将梁端受拉翼缘拉力转化为对应边对节点区的压力,使得节点区形成了混凝土斜压带传力模式,提高了节点区抗震性能; 试件滞回曲线较为饱满,在梁翼缘与端板连接焊缝存在施工缺陷情况下,其整体侧移、延性系数和等效黏滞阻尼比分别达到3.50%(推)/4.50%(拉)、2.92(推)/3.21(拉)和0.306,且承载力仍未下降至其极限承载力的85%,即试件结构具有良好的变形、抗震延性与耗能能力; 该试件在循环往复荷载下呈现的破坏模式为梁削弱截面部位和PEC柱脚相继形成塑性铰的塑性机构。
Abstract:
To further study the seismic performance of PEC column-steel beam composite frame structural system, a small scale model of a two-story and one bay composite frame with a ratio of 1/2 was designed. Seismic test was conducted on the model under low-cycle reversed loading. Based on experimental observation and measurements, the hysteretic loops were derived, and the seismic performance, such as hysteretic characteristics, lateral resistant stiffness, mechanical behavior of joint, energy dissipation, ductility and failure mode were analyzed. The research results show that the model has a high bearing capacity and large lateral resistant stiffness. The location of the plastic hinge is away from the panel zone by reducing the beam section, and the force-transfer mode of concrete strut improves the shear strength in the panel zone with end-plate and through-out bolts connection. The test model has approximately a full hysteretic loop. Its global drift, ductility efficient and equivalent viscous damping ratio are 3.50%(push)/4.50%(pull), 2.92(push)/3.21(pull)and 0.306 respectively when its bearing capacity is still larger than 85% of its ultimate capacity. It proves that the test model has better deformation, ductility and energy-dissipation capacity. The plastic failure mode induced by the plastic hinges first occurs on the reduced beam section of steel beam and then at the foot of the PEC column.

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备注/Memo

备注/Memo:
收稿日期:2018-01-16; 修回日期:2018-03-12基金项目:国家自然科学基金项目(51478286,51078247)、江苏省“六大人才高峰”高层次人才项目(2016-JZ-033)资助作者简介:方有珍(1972-),男,教授,硕导,博士。主要从事钢结构与组合结构抗震性能研究。Email:Fyz72@mail.usts.edu.cn
更新日期/Last Update: 2019-12-25