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（廣州大學(xué)土木工程學(xué)院， 廣州 510006）

［摘要］采用有限元軟件對(duì)帶消能樓梯間框架結(jié)構(gòu)、帶普通樓梯間框架結(jié)構(gòu)、帶滑動(dòng)樓梯間框架結(jié)構(gòu)及空框架結(jié)構(gòu)進(jìn)行地震作用下的數(shù)值仿真分析，研究了消能樓梯間對(duì)框架結(jié)構(gòu)抗震性能的影響及消能樓梯間在整體結(jié)構(gòu)中的減震效果。結(jié)果表明：消能樓梯間同時(shí)消除了梯板的支撐效應(yīng)、填充墻的剛度效應(yīng)及約束效應(yīng)，而未明顯改變結(jié)構(gòu)的抗側(cè)剛度分布，對(duì)結(jié)構(gòu)動(dòng)力特性的影響很小；消能樓梯間消耗了輸入結(jié)構(gòu)中的大量地震能量，提供了一定的有效附加阻尼比，減小了結(jié)構(gòu)的樓層剪力、層間位移，提高了框架結(jié)構(gòu)的抗震性能；消能樓梯間減輕了樓梯間構(gòu)件、框架梁柱等在地震作用下的損壞程度，改善了結(jié)構(gòu)的屈服情況，有助于結(jié)構(gòu)實(shí)現(xiàn)“強(qiáng)柱弱梁”的屈服機(jī)制。

［關(guān)鍵詞］消能樓梯間； 滑動(dòng)樓梯間； 框架結(jié)構(gòu)； 抗震性能； 抗側(cè)剛度； 填充墻

中圖分類號(hào)：TU375-4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)21-0080-06

Seismic performance analysis of frame structures with damped staircases

Luo Dezhang， Deng Xuesong， Zhou Yun， Zhang Chao

(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract:Numerical simulation analysis was conducted on the frame structure with damped staircase, the frame structure with conventional staircase, the frame structure with sliding staircase and bare frame structure under earthquake actions, in order to research the effect of damped staircase on the seismic performance of frame structure and the energy dissipating performance of damped staircase. The results show that damped staircase decreases infill walls′ stiffness and eliminate the restraint effect and brace effect produced by stairs. The damped staircase does not significantly change the lateral stiffness distribution of the structure, and has little effect on the dynamic characteristics of the structure. The damped staircase consumes a large amount of seismic energy in the input structure, provides a certain effective additional damping ratio, reduces the floor shear force and interlayer displacement, and improves the seismic performance of the frame structure; damped staircase reduces the damage degree of staircase members, frame beams and columns under earthquake action, improves the yielding of the structure, and contributes to the yielding mechanism of “strong column and weak beam” of the structure.

Keywords:damped staircase; sliding staircase; frame structure; seismic performance; lateral stiffness; infill wall

*國(guó)家自然科學(xué)基金（51178128）。

通訊作者：鄧雪松，碩士，教授，Email: deng2593@163.com。