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(1 黑龍江八一農(nóng)墾大學(xué)土木水利學(xué)院, 大慶 163319;2 鄭州大學(xué)綜合設(shè)計(jì)研究院有限公司, 鄭州 450002)
摘要: 為避免四邊連接屈曲約束鋼板墻在周邊非約束區(qū)特別是角部首先發(fā)生破壞,提出四邊連接角部削弱開洞屈曲約束鋼板墻。 在鋼板墻角部切除一定范圍以消除角部應(yīng)力集中的影響;然后在屈曲約束鋼板墻中部沿 45°方向錯(cuò)列開洞,實(shí)現(xiàn)鋼板墻的塑性應(yīng)變主要集中于墻體中部且保持較高的受力效率。 利用經(jīng)過模型試驗(yàn)結(jié)果驗(yàn)證的有限元分析方法對四邊連接角部削弱開洞屈曲約束鋼板墻的受力性能進(jìn)行了參數(shù)分析,考慮了不同墻體尺寸和不同開洞率的影響,確定了合理的開洞間距和尺寸。 分析表明,提出的開洞方案能夠有效地減小屈曲約束鋼板墻周邊連接處的屈服區(qū)并降低塑性應(yīng)變峰值,同時(shí)避免對邊緣構(gòu)件產(chǎn)生過大的附加內(nèi)力,有利于四邊連接屈曲約束鋼板墻受力性能的充分發(fā)揮。
關(guān)鍵詞: 屈曲約束鋼板墻; 四邊連接; 錯(cuò)列開洞; 開洞率; 塑性應(yīng)變
中圖分類號:TU392. 4 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)23-0147-06
DOI:10. 19701 / j. jzjg. LS210282
Study on mechanical behavior of holed buckling restrained steel plate shear wall with weakened corners
LIU Wenyang1, WANG Liming2, DAI Qipeng1, BAI Na1
(1 College of Civil Engineering and Water Conservancy, Heilongjiang Bayi Agricultural University, Daqing 163319, China;2 Zhengzhou University Multi-functional Design and Research Academy Co. , Ltd. , Zhengzhou 450002, China)
Abstract: The holed buckling restrained steel plate wall ( HBRW) with four-side connection and weakened corners wasproposed to avoid the early failure in the surrounding unconstrained area, especially in the corner of the buckling restrainedsteel plate shear wall (BRW) with four-side connection. A certain part at the corners of the BRW was cut to eliminate theinfluence of the stress concentration in the corner. Then, staggered holes were opened in the middle part of the BRW alongthe 45° direction to concentrate the plastic strain mainly in the middle part of the wall with high load efficiency. Theparametric analyses for mechanical behavior of HBRW were carried out by using the finite element method which wasvalidated by other model test results, the influence of different wall sizes and different opening rates was considered, andthe reasonable spacing and size of opening holes were determined. The analysis results show that the proposed holed schemecan effectively reduce the yield zone and peak value of plastic strain at the edges of BRW, and avoid excessive additionalinternal force on the boundary members, which is conducive to full play of the mechanical behavior of BRW with four-sideconnection.
Keywords:buckling restrained steel plate shear wall; four-side connection; staggered hole; hole ratio; plastic strain
∗國家自然科學(xué)基金項(xiàng)目(51608180),大慶市指導(dǎo)性科技計(jì)劃項(xiàng)目(zd-2021-85)。
第一作者:劉文洋,博士,副教授,主要從事鋼結(jié)構(gòu)抗震研究,Email:wyliu81@ 126. com。
[引用本文] 劉文洋,王立明,代啟鵬,等. 角部削弱開洞屈曲約束鋼板墻受力性能研究[ J]. 建筑結(jié)構(gòu),2022,52(23): 147-152. LIU Wenyang, WANG Liming, DAI Qipeng, et al. Study on mechanical behavior of holed bucklingrestrained steel plate shear wall with weakened corners[J]. Building Structure,2022,52(23):147-152.
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