- 摘 要
-
(重慶市設計院， 重慶 400015)
［摘要］近年來，基于性能的結構抗震設計方法得到了廣泛關注和研究，我國也有相應的規(guī)范條文。但是常規(guī)設計方法僅考慮了多遇地震作用，得到的設計結果往往不能無法滿足設防、罕遇地震下構件性能水準要求。而設防、罕遇地震彈性、不屈服設計方法得到的設計結果又存在經(jīng)濟性不佳或者構件嚴重超筋等情況。故現(xiàn)有的常規(guī)設計方法在抗震性能設計領域有所欠缺。本文認為，當所有構件都處于性能水準允許的極限狀態(tài)，結構就處于性能水準允許的最低剛度狀態(tài)。即性能水準對應了構件的允許最低剛度，在這個前提下本文提出了利用折減構件剛度進行設防、罕遇地震作用計算的近似設計方法，相對于現(xiàn)有常規(guī)設計方法更容易滿足性能水準要求，且具有較好的經(jīng)濟性。最后通過一個典型算例進行驗證。
［關鍵詞］性能設計； 性能水準； 抗震； 剛度折減
中圖分類號： TU318 文獻標識碼： A文章編號： 1002-848X(2016)S1-0359-04
Performance-based seismic design method of structure based on components′ stiffness
reduction according to seismic performance levelsBao Haoshan
(Chongqing Architectural Design Institute， Chongqing 400015, China)
Abstract: In recent years, Performance-based seismic design of structure has gained wild attention and research. It has also been introduced in Chinese code for seismic design of buildings. But the conventional seismic design result can not always satisfy the seismic performance objectives of structure in service level and maximum considered earthquake, and the elastic design and un-yield design result will greatly increase the cost. So we have some defects in recent performance-based seismic design of structure methods. The components have allowable lowest stiffness according to seismic performance levels of structure. The stiffness of components to design the structure in service level and maximum considered earthquake can be reduced. Comparing to the recent methods, it is more efficient and brings more economical benefits.
Keywords: performance-based seismic design; seismic performance level; seismic; stiffness reduction
作者簡介：包浩杉，碩士，一級注冊結構工程師，Email：baohaoshan@126.com。
