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（清華大學(xué)土木工程系結(jié)構(gòu)工程與振動教育部重點實驗室  北京 100084）

［提要］  為了研究開縫形式對開縫鋼板墻抗震性能的影響，完成了6組共12片1∶4比例的開縫鋼板墻試件的往復(fù)加載試驗。試驗結(jié)果表明：開單層豎縫鋼板墻的屈曲形態(tài)是豎縫間板帶的單獨扭轉(zhuǎn)屈曲形態(tài)（第一類屈曲形態(tài)），屈服與破壞集中在豎縫的端部，造成豎縫間板帶逐漸斷裂，導(dǎo)致試件的剛度與承載力逐漸下降，滯回曲線出現(xiàn)剪切滑移現(xiàn)象；開雙層豎縫鋼板墻的屈曲是板內(nèi)對角方向形成斜拉帶的整板屈曲形態(tài)（第二類屈曲形態(tài)），到剪切位移角超過4％，試件的承載力沒有出現(xiàn)下降，且滯回曲線相對飽滿；豎縫間板帶的長寬比越大，試件的抗側(cè)剛度與屈服承載力越低；與開單層豎縫試件相比，開雙層豎縫墻板的抗側(cè)剛度與屈服承載力均明顯提高。建議的試件初始剛度和承載力理論計算結(jié)果與試驗得到的結(jié)果基本一致。

［關(guān)鍵詞］  開縫鋼板墻  抗震性能  屈曲  靜力試驗

Experimental Study on Seismic Behavior of Steel Plate Shear Walls with Vertical Slits/Zhao Zuozhou, Xiao Ming, Qian Jiaru, Ke Jianghua（Department of Civil Engineering, Key Laboratory for Structural Engineering and Vibration of China Education Ministry, Tsinghua University, Beijing 100084,China）

Abstract:In order to study the effect of the different slit patterns on seismic behavior of steel plate shear walls with vertical slits, 6 groups totally 12 onefourth scaled specimens were loaded under reversed cyclic loading.  The specimens with one layer of the vertical slits all failed in the first type buckling mode: torsional buckling of the individual steel plate between the vertical slits under shear and bending.  For this type of buckling mode, yielding and buckling of the steel plate are concentrated near the ends of each slit.  The lateral stiffness and the load resisting capacity of the specimens gradually decreased and the load displacement hysteresis curve shows shear sliding characteristic. However, the specimens with two layers of the vertical slits all failed in the second type buckling mode: a tension band built along the diagonal direction in tension due to buckling of the entire steel plate.  The load resisting capacity of the specimen did not decrease up to a relative shear displacement over 4% of the specimen height. The load displacement hysteresis curves of these specimens are stable and plump.  With increment of the height to width ratio of the plate between intermediate slits, the lateral stiffness and the load resisting capacity of the specimen decreased.  Compared to the specimens with one layer of vertical slits, the specimens with two layers of the vertical slits showed smaller stiffness and strength. The predicted stiffness and strength of the specimens using proposed method agreed well with the test results.

Keywords:steel plate shear wall with vertical slits; seismic behavior; buckling;static experiment

*清華大學(xué)實驗室開放基金(LF2005001)和北京工業(yè)大學(xué)工程抗震與結(jié)構(gòu)診治北京市重點實驗室開放基金（EERS2004.6）資助項目。