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（1 中國(guó)建筑第八工程局有限公司， 上海 200135； 2 同濟(jì)大學(xué)土木工程學(xué)院， 上海 200092；3 華東建筑集團(tuán)股份有限公司， 上海 200011）

［摘要］基于疊合剪力墻在低周反復(fù)荷載用下的抗震性能試驗(yàn)，考慮疊合板中預(yù)制層和現(xiàn)澆層混凝土強(qiáng)度等級(jí)的不同，推導(dǎo)整個(gè)受力過(guò)程中不同階段疊合剪力墻頂點(diǎn)位移公式和承載力公式，揭示疊合剪力墻預(yù)制層在受力不同階段參與工作程度，并與試驗(yàn)對(duì)比驗(yàn)證公式的合理性。針對(duì)疊合面之間的粘結(jié)滑移問(wèn)題，考慮兩種極端的情況：疊合面之間完全沒(méi)有連接和疊合面之間完全連接，推導(dǎo)疊合剪力墻的最大承載力，和試驗(yàn)對(duì)比得出疊合面之間不會(huì)產(chǎn)生粘結(jié)滑移。在理論分析的基礎(chǔ)上，基于OpenSees程序，建立疊合剪力墻有限元分析模型，利用理論推導(dǎo)的不同階段的承載力作為恢復(fù)力模型骨架曲線的特征點(diǎn)，考慮剛度退化和混凝土剪力墻在低周反復(fù)荷載作用下的捏攏效應(yīng)，建立疊合剪力墻四線型應(yīng)力-應(yīng)變恢復(fù)力模型，模擬結(jié)果和試驗(yàn)結(jié)果對(duì)比較為符合，表明提出的疊合剪力墻恢復(fù)力模型正確合理。

［關(guān)鍵詞］疊合剪力墻； 恢復(fù)力模型； 捏攏效應(yīng)； 粘結(jié)滑移

中圖分類(lèi)號(hào)：TU375文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)02-0020-09

Restoring force model and finite element analysis of double-sided superimposed shear wall

Yu Shaole1, Yan Lianping2,3, Zhang Qilin2, Yan Junsheng1, Zhang Xuewei1, Cui Jiachun3

(1 China Construction Eighth Engineering Division Co., Ltd., Shanghai 200135, China; 2 College of Civil Engineering, Tongji University, Shanghai 200092, China; 3 Arcplus Group PLC, Shanghai 200011,  China)

Abstract:Based on the seismic performance test of the superimposed shear wall under the low cyclic loading, the different concrete strength grades of precast layer and cast-in-place layer in composite slab were considered, and the formulas of top displacement and bearing capacity of superimposed shear wall at different stages during the whole loading process were deduced, and the degrees of participation of precast layer of superimposed shear wall in different stages of loading were revealed. The rationality of the formula was verified by comparison with the experiment. Aiming at the problem of bond-slip between overlapping surfaces, two extreme cases were considered: no connection between overlapping surfaces and complete connection between overlapping surfaces. The maximum bearing capacity of superimposed shear walls was deduced, and no bond-slip between overlapping surfaces was obtained by comparison with test. On the basis of theoretical analysis and OpenSees program, the finite element analysis model of superimposed shear wall was established. Taking the bearing capacity of different stages as the characteristic points of the skeleton curve of the restoring force model,  considering the stiffness degradation and the reduced pinch phenomenon of the concrete shear wall under low cyclic loading,  a four-line stress-strain restoring force model of the superimposed shear wall was established. The simulation results were in good agreement with the experimental results, which shows that the proposed restoring force model for superimposed shear wall is correct and reasonable.

Keywords:superimposed shear wall; restoring force model; reduced pinch phenomenon; bond-slip