- 摘 要
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李少泉 沙鎮(zhèn)平 （廈門大學(xué) 廈門 361005）
[提要] 通過對受不同方向的地震作用的一典型空間鋼筋混凝土框架結(jié)構(gòu)的強度分析，對目前采用的計算模型（即對相互正交的兩個主軸方向分別進行內(nèi)力及強度設(shè)計）提出質(zhì)疑，指出構(gòu)件的最不利受力狀態(tài)隨構(gòu)件的不同和地震作用方向的不同而不同；并解釋了實際結(jié)構(gòu)難以實現(xiàn)強柱弱梁的主要原因，以及角柱震害普遍嚴重的主要原因。計算分析表明，在目前的計算模型下，無論是從結(jié)構(gòu)強度的角度上講，還是從強柱弱梁的抗震設(shè)計原則上講，均需提高柱的設(shè)計強度。
[關(guān)鍵詞] 空間結(jié)構(gòu) 強度分析 雙向偏心受壓柱Under the different direction seismic action,the strength of a typical space reinforced concrete frame is analyzed. The strength problem of the frames is revealed. The existing calculating model is queried which is strength analysis and design to orthogonal two major axis of structures separately. It is pointed out that the worst-case members in force are different with members and direction seismic action. The main reasons are explained why actual structures are hard to bring about the strong column-weak beam, ancl why the seismic calamity of corner columns is serious unlversally. It is indicated by the results that the strength of columns is increased.
Keywords: space structure; frame; strength analysis; two-way column; seismic design
