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(1 中國建筑西北設(shè)計研究院有限公司,西安 710003; 2 同濟大學(xué),上海 200092)
[摘要]鋼管混凝土柱外包式柱腳是通過預(yù)埋于基礎(chǔ)中的定位錨栓將柱腳底板與基礎(chǔ)連接在一起,在基礎(chǔ)頂面以上一定高度范圍內(nèi)的柱外表面設(shè)置抗剪栓釘,以厚度不小于150mm、配置有縱向鋼筋和箍筋的鋼筋混凝土包裹,形成的鋼與混凝土“組合”節(jié)點構(gòu)件,其傳力機制較為復(fù)雜,計算方法一般參照《高層民用建筑鋼結(jié)構(gòu)技術(shù)規(guī)程》(JGJ 99—98)的有關(guān)規(guī)定進行,常應(yīng)用于設(shè)防烈度6,7度地區(qū)的多層建筑結(jié)構(gòu)。目前對于外包式柱腳的抗震性能研究仍不多見。根據(jù)兩個鋼管混凝土柱外包式柱腳節(jié)點的單向低周反復(fù)載荷試驗,來驗證該類節(jié)點的剛接程度及其滯回性能,對該類節(jié)點的抗震設(shè)計方法及構(gòu)造要求進行了探討。
[關(guān)鍵詞]鋼管混凝土;外包式柱腳;抗震設(shè)計
Discussion of seismic design method on semi-embeded CFT column base
Xu Yongji1, Lü Xudong1, Zhang Youyi1, Chen Yiyi2, Wang Wei2, Wang Yi2(1 China Northwest Building Design Research Institute Ltd. Co., Xi′an 710003,China; 2 Tongji University,Shanghai 200092,China)
Abstract:Semi-embeded CFT column base is steel-concrete composite joint component including the stay bolts which are embeded in the foundation to connect the base of column and base plate, the shear studs which are mounted on the surface of column in the specified scope above the foundation, the thickness of the concrete reinforced the longitudinal bar and the stirrup is not smaller than 150mm. Its load transmission mechanism is more complex, and the calculation method is generally based on concerned regulations of technical specification for steel structure of tall building(JGJ 99—98). Semi-embeded CFT column base is often used in multi-story stuctures located in the area of seismic fortification intensity 6 or 7.At present, the research on the seismic performance has been done insufficiently in this column base. Based on the experiment about semi-embeded CFT column base under the low-cycle repeated load to test for the rigid conection degree and hysteresis performance, the seismic design method and structural request are proposed for this type joints.
Keywords:CFT; semi-embeded column base; seismic design
作者簡介:徐永基,顧問總工程師,Email:xu356870@sohu.com。
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