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

（中北大學(xué)土木工程學(xué)科管理部, 太原 030051）

［摘要］我國(guó)《建筑抗震設(shè)計(jì)規(guī)范》（GB 50011—2010）并未給出交錯(cuò)桁架結(jié)構(gòu)的結(jié)構(gòu)影響系數(shù)的具體數(shù)值。為明確其結(jié)構(gòu)影響系數(shù)的取值，依據(jù)相應(yīng)的規(guī)范設(shè)計(jì)了3個(gè)層數(shù)為4層、8層和12層的交錯(cuò)桁架結(jié)構(gòu)模型，通過MIDAS Gen軟件中的推覆(Pushover)分析得出結(jié)構(gòu)的能力譜曲線，再通過能力譜法得出彈塑性需求譜曲線。將結(jié)構(gòu)的能力譜曲線和彈塑性需求譜曲線族繪制于同一坐標(biāo)系中，通過試算確定結(jié)構(gòu)的目標(biāo)位移及求解結(jié)構(gòu)影響系數(shù)和位移放大系數(shù)的相關(guān)點(diǎn)的坐標(biāo)。根據(jù)性能點(diǎn)處的指標(biāo)評(píng)估結(jié)構(gòu)的抗震性能，并求出結(jié)構(gòu)影響系數(shù)的值。研究表明：對(duì)于選取適當(dāng)構(gòu)件截面的交錯(cuò)桁架結(jié)構(gòu)在設(shè)防烈度地震和罕遇地震作用下的變形均滿足抗規(guī)要求；建議交錯(cuò)桁架結(jié)構(gòu)的結(jié)構(gòu)影響系數(shù)和位移放大系數(shù)宜分別取值為3.0和5.0；通過塑性鉸分析，交錯(cuò)桁架空腹處的梁對(duì)結(jié)構(gòu)的性能有重要的影響。

［關(guān)鍵詞］交錯(cuò)桁架體系； 結(jié)構(gòu)影響系數(shù)； 位移放大系數(shù)； Pushover分析

中圖分類號(hào)：TU398-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)13-0084-05

Study on structural influencing coefficient of staggered truss steel framing system

ZHENG Liang, QIN Cheng, GUO Hong, ZHANG Dapeng, GENG Shaobo

（School of Civil Engineering, North University of China， Taiyuan 030051， China）

Abstract:The Code for seismic design of building(GB 50011—2010) do not provide specific values for the structural influence coefficient of the staggered truss steel framing systems.  In order to clarify the value of the structural influence coefficient, three staggered  truss steel framing system models with 4 layers, 8 layers, and 12 layers were designed according to the corresponding specifications. The capacity spectrum curve was obtained through Pushover analysis in MIDAS Gen software，and the inelastic demand spectrum curve was obtained through the capability spectrum method. The capacity spectrum curve and inelastic demand spectrum curve of the structure were drawn in the same coordinate system, and the coordinates of the relevant points of the structure′s target displacement, structural influencing coefficient and structural displacement amplification factor were determined through trial calculation. The seismic performance of the structure was evaluated according to the index at the performance point, and the value of the structural influencing coefficient was obtained. It is shown that: the deformation of staggered  truss steel framing systems in the fortification earthquake and rare earthquake conform to the code for seismic design of buildings requirements. The structural influencing coefficient and displacement amplification factor are respectively recommended to be 3.0 and 5.0. Through the plastic hinge analysis, the beam at the open-web truss has an important influence on the performance of the structure.

Keywords:staggered truss steel framing system; structural influencing coefficient; displacement amplification factor; Pushover analysis

*國(guó)家自然科學(xué)基金青年科學(xué)基金項(xiàng)目（51408558）。

作者簡(jiǎn)介：鄭亮，博士，講師，Email:zl_5403@126.com。