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（內(nèi)蒙古科技大學(xué)土木工程學(xué)院， 包頭 014010）

［摘要］為研究部分包裹混凝土柱-型鋼梁頂?shù)捉卿撨B接三維框架的抗震性能，對(duì)框架試件進(jìn)行低周反復(fù)水平荷載試驗(yàn)，研究此類框架的破壞模式和承載力、滯回性能、延性等一系列抗震性能指標(biāo)。研究結(jié)果表明:框架梁端屈曲明顯，靠近角鋼肢處出現(xiàn)塑性鉸，頂?shù)捉卿撟冃螄?yán)重;滯回曲線比較飽滿，在各級(jí)循環(huán)荷載作用下承載力降低系數(shù)在0-95～0-99之間，框架強(qiáng)度退化穩(wěn)定。節(jié)點(diǎn)位移延性系數(shù)在2-01～2-85之間，等效黏滯阻尼系數(shù)在0-35～0-46之間，滿足抗震設(shè)計(jì)要求，框架具有良好的延性和耗能能力。頂?shù)捉卿撨B接節(jié)點(diǎn)的初始轉(zhuǎn)動(dòng)剛度在半剛性節(jié)點(diǎn)范圍內(nèi)，是延性較好的節(jié)點(diǎn)。

［關(guān)鍵詞］部分包裹混凝土； 角鋼連接； 框架； 擬靜力試驗(yàn)； 抗震性能

中圖分類號(hào)：TU398文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)06-0076-06

Research on seismic behavior of  frame of partially encased concrete (PEC) column and steel beam connected with top-bottom angle

Zhao Gentian, Zuo Yanhui

(School of Civil Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China)

Abstract:In order to study the seismic behavior of three-dimensional frame of PEC column and steel beam jointed by top-bottom angle, the frame specimen was  tested under low cycle reversed quasi-static loading. The seismic behavior indicators were analyzed, such as the failure mode, bearing capacity, hysteretic behavior and displacement ductility coefficient. The results show that: the steel beam end buckles significantly, the plastic hinge appears near the limb of the angle and the top-bottom angle steel seriously deforms. Hysteresis curve of the frame is relatively full, and the bearing capacity reduction factor level is between 0-95 and 0-99. Strength degradation of frame is stable under cyclic load. The displacement ductility coefficient of joints is ranged from 2-01 to 2-85, and the equivalent viscous damping coefficients is between 0-35 and 0-46, which meets the seismic design requirements. The three-dimension frame had good ductility and energy dissipation capacity. The initial rotational stiffness of top-bottom angle joint is in the range of semi-rigid joint, which has good ductility.

Keywords:partially encased concrete; angle steel connection; frame; quasi-static test; seismic behavior

*國(guó)家自然科學(xué)基金項(xiàng)目(51268042)。

作者簡(jiǎn)介：趙根田，博士，教授，Email:zhaogentian93110@sina.com。