- 摘 要
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（1 揚州市人民政府抗震人防辦公室， 揚州 225009； 2 揚州大學(xué)建筑科學(xué)與工程學(xué)院， 揚州 225127）
［摘要］為研究托換后寬柱雙梁節(jié)點的抗震性能，設(shè)計制作了6個1∶2縮尺的寬柱雙梁節(jié)點，并進行了擬靜力循環(huán)加載試驗，研究了軸壓比、縱梁對寬柱雙梁節(jié)點的承載能力、剛度、耗能及延性等性能的影響。結(jié)果表明：混凝土與鋼筋之間存在一定的粘結(jié)滑移，但節(jié)點總體抗震性能良好；軸壓比的增大在一定程度上提高了試件的極限承載能力，增大柱頂軸壓力提高了節(jié)點核心區(qū)的抗剪承載力，但節(jié)點的延性出現(xiàn)了顯著的下降；通過平面寬柱雙梁節(jié)點與空間寬柱雙梁節(jié)點對比，平面寬柱雙梁節(jié)點的極限承載力更優(yōu)。
［關(guān)鍵詞］寬柱雙梁節(jié)點； 軸壓比； 承載能力； 抗震性能； 延性
中圖分類號：TU375-4文獻標(biāo)識碼：A文章編號：1002-848X(2021)01-0072-07
Experimental study on seismic performance of wide-column double-beam joints
XU Hong1, MENG Ruizhi2, CAO Dafu2, GE Wenjie2, BAO Jun2
(1 Anti Earthquake Civil Air Defense Office of Yangzhou Municipal People′s Government, Yangzhou 225009, China；2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China)
Abstract:In order to study the seismic performance of wide-column double-beam joints after underpinning, six wide-column double-beam joints with a scale of 1∶2 were designed and made. The pseudo-static cyclic loading test was carried out to study the effects of axial compression ratio and the longitudinal beam to the wide-column double-beam joints′ performance such as bearing capacity, stiffness, energy dissipation and ductility of the joints. The results show that bond slip between concrete and steel bar occurred, but the seismic performance of the joints are good; with the increase of axial compression ratio, the ultimate bearing capacity of the specimens is improved to a certain extent.And increases the axial pressure of the column top,the shear-bearing capacity of the core area of the joints is improved, but the ductility of the joints has decreased significantly; according to comparison of the plane and spatial wide-column double-beam joints, the plane wide-column double-beam joints has higher ultimate bearing capacity.
Keywords:wide-column double-beam joint; axial compression ratio; bearing capacity; seismic performance; ductility
*國家自然科學(xué)基金資助項目 (51578478)。作者簡介：徐紅，學(xué)士，高級工程師，Email: 1057080710@qq.com；通信作者：曹大富，碩士，教授，博士生導(dǎo)師， Email: dfcao@yzu.edu.cn。
