- 摘 要
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(杭州市城建設計研究院有限公司， 杭州 310020)
［摘要］針對蒙古國Eco-Tower鋼結構高層項目的實際設計條件，選用兩個相同的鋼框架-支撐結構模型，分別采用中國規(guī)范與美國規(guī)范規(guī)定的材料特性、活荷載、風荷載、地震荷載及相關參數進行設計，并對兩個模型的動力特性、層間位移角、剛度比、二階效應系數、構件內力、應力比及相關控制指標等計算結果進行對比分析。分析結果表明：兩國規(guī)范都是恒荷載、活荷載、風荷載控制設計，結構整體指標及構件設計結果均比較接近，結構安全度基本相當。其中中國規(guī)范的層間側移角、二階效應系數等要求比美國規(guī)范略嚴。此外，活荷載美國規(guī)范偏大，而地震工況、風工況及組合工況內力、構件設計應力中國規(guī)范偏大。本項目如按美國規(guī)范進行設計，經濟性略優(yōu)于中國規(guī)范；而按中國規(guī)范進行設計，安全度略大于美國規(guī)范。
［關鍵詞］高層建筑；鋼框架-支撐結構；中美規(guī)范；結構設計
中圖分類號：TU973-13 文獻標識碼：A文章編號：1002-848X(2021)13-0070-09
Comparison between Chinese and American code for design of Mongolia Eco-Tower steel structure
JIN Tiande, DING Bin
(Architectural & Civil Engineering Design Institute Co., Ltd., Hangzhou 310020， China)
Abstract: In view of the actual design conditions of the high-rise steel structure project of Mongolian Eco Tower, two identical steel frame-bracing structure models were selected, and the material properties, live load, wind load, seismic load and related parameters stipulated by Chinese and American code were used respectively to carry on a design. The results of dynamic characteristic, layer displacement angle, the stiffness ratio, the second-order effect coefficient, the internal force and stress ratio of component, and relevant control indicator for the two models were compared and analyzed. The analysis results show that design are both controlled by dead loads, live and wind loads for Chinese and American Codes, the overall indicators of structure and design results of component are both relatively close, and the structural safety is basically the same. Chinese codes are slightly more stringent requirement on the layer displacement angle and second-order effect coefficient than American codes. In addition, the live load of American codes is larger, the wind and earthquake conditions, internal force for combined conditions, and design stress ratios of component of Chinese codes are larger. The economy is slightly better than Chinese codes if designed by American codes for this project, and the security is slightly higher than that of American codes if designed by Chinese codes.
Keywords:high-rise building； steel frame-bracing structure； Chinese and American code； structural design
作者簡介：金天德，碩士，教授級高級工程師，Email:jin_td@163.com。
