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（1 上海長福工程結(jié)構(gòu)設(shè)計(jì)事務(wù)所  200011； 2 北京金土木軟件技術(shù)有限公司  100044）

［提要］  樓板作為水平抗側(cè)力構(gòu)件，在承受和傳遞豎向力的同時(shí)，把水平力傳遞和分配給豎向抗側(cè)力構(gòu)件，協(xié)調(diào)同一樓層中豎向構(gòu)件的變形，使建筑物形成一個(gè)完整的抗側(cè)力體系。連接兩個(gè)主體結(jié)構(gòu)的連接板是樓板的薄弱部位，針對薄弱連接板的平面內(nèi)應(yīng)力分析及其抗震設(shè)計(jì)，采用分塊剛性力學(xué)模型作一些探討。工程實(shí)例表明，時(shí)程分析法反映了連接板兩端主體結(jié)構(gòu)潛在反相運(yùn)動產(chǎn)生的平面內(nèi)應(yīng)力增大效應(yīng)。對于連接板的截面設(shè)計(jì)，推薦采用主拉應(yīng)力表達(dá)式。小震作用下，按裂縫控制等級二級，采用混凝土抗裂強(qiáng)度標(biāo)準(zhǔn)值作為控制連接板混凝土核心層開裂的指標(biāo)。中震作用下，采用水平鋼筋的抗拉強(qiáng)度設(shè)計(jì)值作為連接板承載能力的指標(biāo)。

［關(guān)鍵詞］  水平抗側(cè)力構(gòu)件  連接板  平面內(nèi)應(yīng)力  中震分析

Structural Seismic Design and Analysis of Linking RC Slab in Tallbuilding/Authors:Fu Changsheng1, Liu Chunming2, Li Yongshuang2, Ying Jun1(1 Shanghai ChinaFu Structural Design Inc., Shanghai 200011,China;2 Civil King Software Technology Co.,Ltd., Beijing 100044,China)

Abstract:In seismic design of buildings, floors are horizontal elements of the lateral force resisting system, which play an important role in transferring and distribution of the horizontal forces generated by earthquake excitations to vertical elements of the lateral force resisting system. The linking slab, connecting two main structures at its two ends, is the weak place of the floor. A procedure for analysis of in-plan stresses of the linking slab is proposed. It is shown that the potential out-phase motion of the two main structures would cause the stress concentration in vicinity of holes and corners of the slab, which could be observed in the results obtained by time history analysis. It is suggested that the formula for design of reinforced concrete linking slab under the horizontal seismic action would be the expressions in terms of the principal tensile stress.

Keywords:horizontal elements; lateral force resisting system; linking slab; inplane stresses; medium strong seismic analysis