采用冷軋帶肋鋼筋焊接網(wǎng)的抗震墻性能研究
李耕勤 錢稼茹 顧萬黎
- 摘 要
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李耕勤 錢稼茹 （清華大學(xué)土木系 北京 100084）顧萬黎 （中國建筑科學(xué)研究院 北京 100013）
[提要] 完成了5個不同軸壓比、不同截面形式的抗震墻試件在往復(fù)水平荷載作用下的試驗，抗震墻的約束邊緣構(gòu)件按《建筑抗震設(shè)計規(guī)范》( GB50011-2001)設(shè)置，分布筋采用冷軋帶肋鋼筋焊接網(wǎng)。計算分析了4片設(shè)有約束邊緣構(gòu)件和構(gòu)造邊緣構(gòu)件的抗震墻邊緣混凝土達(dá)到極限壓應(yīng)變時，豎向分布冷軋帶肋鋼筋的最大拉應(yīng)變；用DRAIN 2D+程序?qū)σ淮币患墸?度）采用冷軋帶肋鋼筋焊接網(wǎng)為分布筋的抗震墻結(jié)構(gòu)進行了大震作用下的彈塑性時程分析。研究結(jié)果表明，通過合理設(shè)計，采用冷軋帶肋鋼筋焊接網(wǎng)作為分布筋的抗震墻能夠滿足抗震要求。在此基礎(chǔ)上，給出了冷軋帶肋鋼筋焊接網(wǎng)抗震墻的設(shè)計建議。
[關(guān)鍵詞] 冷軋帶肋鋼筋焊接網(wǎng) 抗震墻 約束邊緣構(gòu)件 抗震性能 設(shè)計建議
Pseudo-static experiment of five solid shear wall specimens with different axial load ratio and different section type has been carried out.The confined boundary elements of the speclmens were designed according to Code for Seismic Design of Buildings ( GB50011-2001 ) and the cold-rolled ribbed welded steel fabrics were used as the distributed reinforcements. By calculating, the maxlmum tension strain of the cold-ribbed welded steel of the RC shear wall with confined boundary elements or with ordinary boundary elements is studied as the maximum compressive strain of concrete reaches its limited value. The elastic-plastic time history analysis for a grade one ( seismic fortification intensity 8) RC cold-rolled ribbed welded steel fabric shear wall building structure under the severe earthquake is performed with the DRAIN 2D+ program.Based on the achievements of this study, the design recommendations are presented.
Keywords: cold-rolled ribbed welded steel fabric; shear wall; confined boundary element; seismic behavior; design
