884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（廣州大學(xué)減震控制與結(jié)構(gòu)安全國家重點(diǎn)實(shí)驗(yàn)室(培育)，  廣州 510405）

［摘要］對隔震結(jié)構(gòu)提出以中震彈性為基準(zhǔn)設(shè)防目標(biāo)的性能化設(shè)計(jì)方法，并通過引入結(jié)構(gòu)性能系數(shù)φ調(diào)整同一震級(jí)下不同性能設(shè)防目標(biāo)之間的關(guān)系；提出通過迭代計(jì)算確定隔震層的水平等效剛度和等效阻尼比的方法，并通過兩種不同的初值進(jìn)行迭代方法的驗(yàn)證；對比了隔震結(jié)構(gòu)采用直接設(shè)計(jì)法和傳統(tǒng)的兩階段分部設(shè)計(jì)法的內(nèi)力和配筋結(jié)果。研究表明，提出的設(shè)計(jì)方法可通過引入結(jié)構(gòu)性能系數(shù)φ調(diào)整同一震級(jí)下不同地震作用效應(yīng)的組合以適應(yīng)不同的性能設(shè)計(jì)目標(biāo)；相比較傳統(tǒng)的兩階段分部設(shè)計(jì)法，上部結(jié)構(gòu)隨隔震層的平動(dòng)改變了構(gòu)件之間的地震作用分配方式，減輕了中梁的受扭現(xiàn)象，使上部構(gòu)件的受力更加合理。

［關(guān)鍵詞］隔震結(jié)構(gòu)； 等效剛度； 等效阻尼比； 結(jié)構(gòu)性能系數(shù)； 直接設(shè)計(jì)法

中圖分類號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)09-0071-06

Study on performance-based direct design method for seismic isolation structure

Teng Xiaofei, Tan Ping, Zhou Linli, Jin Jianmin, Liu Yanhui

(State Key Laboratory for Seismic Control and Structural Safety (Cultivation Base), Guangzhou University, Guangzhou 510405, China)

Abstract:Performance-based direct design method for seismic isolated structure under the basic fortification target of keeping elasticity under fortification earthquake was proposed, and the relationship of different performance targets was adjusted by introducing the structural performance coefficient φ under the same seismic magnitude. A method for determining the horizontal equivalent stiffness and the equivalent damping ratio of the isolation layer by iterative calculation was proposed, and the iterative method was verified using two different initial values. The results of internal forces and reinforcement of isolated structures were compared using direct design method and traditional two-stage partial design method. The research shows that the proposed design method can adjust the combination of different seismic effects under the same magnitude by introducing the structural performance coefficient φ  to adapt to different performance design targets. Compared with the traditional two-stage partial design method, the super structure changes the distribution of seismic action among the members with the horizontal displacement of the isolation layer, which alleviates the torsion phenomenon of the middle beam, and makes the mechanism of the superstructure more reasonable.

Keywords:isolation structure; equivalent stiffness; equivalent damping ratio; structural performance coefficient; direct design method