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(上海長(zhǎng)福工程結(jié)構(gòu)設(shè)計(jì)事務(wù)所，上海 200011)

［摘要］歸納了6種類型的不規(guī)則樓板，簡(jiǎn)述了它們的受力特點(diǎn)和分析要點(diǎn)。結(jié)合兩個(gè)工程實(shí)例，應(yīng)用彈性樓板模型對(duì)不規(guī)則樓板的平面應(yīng)力及樓板與豎向構(gòu)件之間的相互影響進(jìn)行了詳細(xì)剖析。當(dāng)樓板的凹槽或洞口實(shí)質(zhì)性地改變了水平力的傳力途徑，可能會(huì)造成應(yīng)力集中，影響到豎向構(gòu)件的內(nèi)力分布。凹槽附近，除了樓板需要加強(qiáng)以外，對(duì)豎向構(gòu)件也要采取加強(qiáng)措施，避免過(guò)早出現(xiàn)塑性鉸，成為結(jié)構(gòu)的薄弱部位。對(duì)于剛度較強(qiáng)的電梯井壁，井道貫通、樓板缺失，通過(guò)豎向構(gòu)件也是可以傳遞水平力剪力、協(xié)調(diào)變形的。但是對(duì)井壁角部的應(yīng)力水平應(yīng)加以注意，尤其是處于高烈度區(qū)結(jié)構(gòu)的頂部區(qū)域。

［關(guān)鍵詞］樓板；樓板不規(guī)則；樓板-豎向構(gòu)件相互影響

Slab irregularity and its effects on seismic design of the structure

Fu Changsheng, Ju Jin(Shanghai Changfu Structural Design Inc., Shanghai 200011, China)

Abstract:The slab irregularity was defined. To study the dynamic behavior of the irregular slab and the slab-vertical element cross-effects, two engineering projects were analyzed by using finite element method. The results show that the deep slot or big holing in slab may change the direction of the in-planar stress flow, resulting in stress concentration both in the slab and vertical elements in vicinity of the slot or hole. Both slab and vertical elements around the slot should be designed for avoiding earlier yielding by the over-strength factor. For lift well, the wall, which is stiff,may resist the horizontal force and be deformed as integrity. However, caution should be taken on the stress intensity at corner of the wall in upper portion of the designed structures in high seismic zone.

Keywords:slab; slab irregularity; slab-vertical element cross-effects

作者簡(jiǎn)介：扶長(zhǎng)生(1944-)，男，上海人，教授級(jí)高級(jí)工程師，Email:cfstruct@vip.sina.com。

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