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（1 天津大學建筑工程學院， 天津 300072； 2 天津大學建筑設計規(guī)劃研究總院有限公司， 天津 300073）
［摘要］采用基于計算的鋼結(jié)構(gòu)耐火分析方法，利用高大空間火災升溫公式進行火災溫度場分析，繼而將火災高溫荷載進行偶然荷載組合并施加在復合式索穹頂結(jié)構(gòu)上。利用有限元法分析研究了復合式索穹頂結(jié)構(gòu)在火災高溫荷載工況下的力學性能；并改變火源位置、火源釋熱功率、火源燃燒速率以及火源單位面積釋熱功率四種參數(shù)，探究不同火源參數(shù)對復合式索穹頂結(jié)構(gòu)力學性能的影響。根據(jù)火災高溫下復合式索穹頂結(jié)構(gòu)力學性能的參數(shù)分析，提出了結(jié)構(gòu)耐火分析建議。
［關鍵詞］復合式索穹頂結(jié)構(gòu)； 火災溫度場分析； 有限元法； 力學性能； 火源參數(shù)
中圖分類號：TU393-3， TU394文獻標識碼：A文章編號：1002-848X(2020)23-0024-07
Parametric analysis on mechanical properties of composite-type cable dome structure under high temperature of fire
YU Jinghai1,2, TANG Yuxuan1, ZHANG Zhongyu1, LI Luchuan2, YAN Xiangyu2
(1 School of Civil Engineering， Tianjin University， Tianjin 300072， China； 2 Tianjin University Research Institute of Architectural Design and Urban Planning Co., Ltd., Tianjin 300073，China)
Abstract:The fire resistance analysis method of steel structure based on calculation was used to analyze the temperature field of fire by using the large-space fire heating formula, then the high-temperature fire load was combined by accidental load and applied to the composite-type cable dome structure. The mechanical properties of composite-type cable dome structure under high temperature load were analyzed by finite element method; the four parameters of fire, which are fire source location, fire source heat release power, the fire source combustion rate and fire source heat release power per unit area were changed to explore the effect of different fire source parameters on the mechanical properties of composite cable domes. According to the parametric analysis of mechanical properties of composite-type cable dome structure under high temperature of fire, the fire resistance suggestions of the structure were proposed.
Keywords:composite-type cable dome structure; fire temperature field analysis; finite element method; mechanical property; fire source parameter
*天津市創(chuàng)新創(chuàng)業(yè)團隊特殊支持項目（TJTZJH-GCCCXCYTD-1-3）。
作者簡介：于敬海，博士，研究員，博士生導師，Email:yjh300072@163.com。
