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(上海建筑設(shè)計(jì)研究院有限公司, 上海 200041)

［摘要］鋼筋混凝土連梁跨高比偏小容易破壞，在某實(shí)際工程中應(yīng)用了一種可在小震下發(fā)生第一次屈服并且仍保持一定剛度，繼而在中震和大震下發(fā)生第二次屈服的雙階耗能連梁。經(jīng)過(guò)小震以及中震、大震動(dòng)力時(shí)程分析，結(jié)果表明，應(yīng)用雙階耗能連梁的結(jié)構(gòu)與應(yīng)用鋼筋混凝土連梁的結(jié)構(gòu)相比，其層間位移角和基底剪力以及剪力墻的性能均有提升，多遇地震下結(jié)構(gòu)總地震作用降低了20%，罕遇地震下墻體更晚進(jìn)入屈服，采用鋼筋混凝土連梁方案的結(jié)構(gòu)剪力墻抗彎屈服數(shù)量達(dá)30%左右，而雙階耗能連梁方案僅7%，從而有效保護(hù)結(jié)構(gòu)。

［關(guān)鍵詞］聯(lián)肢剪力墻； 鋼筋混凝土連梁； 雙階耗能連梁； 減震設(shè)計(jì)

中圖分類號(hào)：TU318文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)04-0129-05

Earthquake-reduction design and application of double-step yielding coupling beam structure

Zhang Jian

(Shanghai Architectural Design & Research Institute Co., Ltd., Shanghai 200041, China)

Abstract:The reinforced concrete coupling beam is easy to break because its  span ratio is small. In a practical project, a kind of  double-step yielding  coupling beam that can yield  first time under small earthquake and still maintain a certain stiffness, and then  yield  second time under  medium earthquake and  large earthquake was applied. After  time-history analyses under small earthquake, medium earthquake and large earthquake, the results show that compared with the structure adopting  the reinforced concrete coupling beam,  the interlayer displacement angle, the base shear force and the performance of the shear wall of the structure adopting  the double-step yielding  coupling beam are improved. Under multiple earthquakes, the total seismic action of the structure is reduced by 20%. Under rare earthquakes, the wall enters yielding later. The shear wall of the structure adopting the reinforced concrete coupling beam scheme has  bending yield of about 30%, while  the shearwall of the structure adopting the double\|step yielding coupling  beam scheme has only bending yield of 7%, thus effectively protecting the structure.

Keywords:coupled shear wall; reinforced-concrete coupling beam; double-step yielding coupling beam; earthquake-reduction design

作者簡(jiǎn)介：張堅(jiān)，學(xué)士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，英國(guó)特許工程師，Email：zhangjian@siadr.com.cn。