- 摘 要
-
(1 同濟(jì)大學(xué)建筑工程系， 上海 200092； 2 上海建工集團(tuán)股份有限公司， 上海 200080；3 上海裝配式建筑技術(shù)集成工程技術(shù)研究中心， 上海 200011)
［摘要］因超高層建筑快速施工的需要，創(chuàng)新研發(fā)了一種可爬升的新型鋼平臺，其鋼柱需支承在養(yǎng)護(hù)13～15h的混凝土剪力墻上承受施工荷載。為了得到這種特早齡期混凝土上的鋼柱承載力設(shè)計方法，對其柱腳繞兩個主軸方向的抗彎性能進(jìn)行了足尺試驗研究，分析了破壞模式、抗彎剛度和承載力。研究結(jié)果表明這種支承于特早齡期混凝土上的鋼柱腳具有足夠的抗彎能力來承受爬升鋼平臺的施工荷載。柱腳的薄弱環(huán)節(jié)在于抗拔鋼筋而非混凝土，混凝土未發(fā)生壓碎破壞。
［關(guān)鍵詞］爬升鋼平臺； 柱腳； 特早齡期混凝土； 足尺試驗； 抗彎性能
中圖分類號：TU391文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)08-0080-05
Experimental study on flexural behavior of steel column base supported on extra-early age concrete
Yu Qitong1, Tong Lewei1,3, Zhou Feng1,3, Wu Kunqiang1, Gong Jian2, Wang Xiao′an2
(1 Department of Structural Engineering, Tongji University, Shanghai 200092, China;2 Shanghai Construction Group Co., Ltd., Shanghai 200080, China;3 Shanghai Engineering Research Center of Assembly Building Technology Integration, Shanghai 200011, China)
Abstract:A new type of climbing steel platform was innovated to meet the needs of rapid construction of super high-rise building. Construction loads were supported by steel columns of the platform standing on a concrete shear wall with only 13 to 15 hours of curing time. To obtain the loading capacity design method of the steel columns on extra-early age concrete, two full-scale tests of steel column base were conducted on flexural behavior around two principal axes. The failure mode, flexural stiffness and strength were investigated. It is concluded that the steel column base standing on extra-early age concrete has enough bending capacity to bear construction loads applied on the climbing steel platform. The weak part of the steel column base is the anti-pulling steel reinforcement rather than the concrete, and the concrete does not crush under compression.
Keywords:climbing steel platform; column base; extra-early age concrete; full-scale test; flexural behavior
作者簡介：郁琦桐，博士研究生，Email:yuqitong09@163.com。
