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（1 中國建筑設(shè)計(jì)研究院有限公司, 北京100044； 2 中國鐵路設(shè)計(jì)集團(tuán)有限公司, 天津 300142）
［摘要］雄安站站房主體結(jié)構(gòu)平面布置呈矩形，南北方向總長度為606m，東西方向總長度為307-5m，采用混凝土框架結(jié)構(gòu)。為了避免溫度效應(yīng)引起內(nèi)力過大、混凝土容易開裂等問題，結(jié)合建筑功能，將主體結(jié)構(gòu)劃分為15個單元。為了滿足建筑造型和防水構(gòu)造等方面的需求，盡量減少大跨度屋蓋結(jié)構(gòu)分縫，站臺雨棚采用下部多個混凝土結(jié)構(gòu)單元+上部鋼屋蓋的結(jié)構(gòu)形式，受力情況復(fù)雜。分別選取2組天然波和1組人工波，采用兩種視波速對結(jié)構(gòu)進(jìn)行三向地震激勵時程分析，并通過多點(diǎn)一致比γ的相關(guān)指標(biāo)對結(jié)果進(jìn)行分析。計(jì)算結(jié)果表明，對于上部鋼結(jié)構(gòu)質(zhì)量與剛度遠(yuǎn)小于下部多個混凝土單元的結(jié)構(gòu)形式，下部混凝土結(jié)構(gòu)受到行波效應(yīng)的影響較小，雨棚邊、角部位的鋼柱受行波效應(yīng)的影響較大,雨棚大跨度鋼梁受行波效應(yīng)的影響最大。
［關(guān)鍵詞］鐵路站房； 超長結(jié)構(gòu)； 行波效應(yīng)； 視波速； 多點(diǎn)一致比
中圖分類號：TU312， TU470文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)07-0089-08
Study on influence of traveling wave effect of platform canopies for Xiong′an Railway Station
Fan Zhong1， Gao Song1， Zhu Dan1， Li Yuanyuan1， Zhang Yu1， Liu Tao1， Song Zhiwen2， Liu Ming2
(1 China Architecture Design & Research Group, Beijing 100044, China; 2 China Railway Design Corporation, Tianjing 300142， China)
Abstract:The main structure of Xiong′an Railway Station is in rectangular shape, with a total length of 606m in the north-south direction and a total length of 307-5m in the east-west direction, and the concrete frame structural system is adopted. In order to avoid the problems of excessive internal force caused by temperature effect and easy cracking of concrete, the main structure is divided into 15 units in combination with the building function. In order to meet the needs of architectural modeling as well as waterproof construction, the number of seams within large-span roof structures is minimized. Therefore, the platform canopies adoptes the structural system of multiple lower concrete structural units + upper steel roof. The interaction mechanism is very complicated. Considering two apparent wave velocities, time-history analysis of three directions seismic excitation was carried out with two natural waves and one artificial wave. The results were analyzed by using ratio of multiple support excitation and simple support excitation . The calculation results show that in case that mass and stiffness of the upper steel structure are much smaller than the lower multiple concrete structure, the lower concrete structure is less affected by the traveling wave effect, and the steel columns of platform canopies at the edge and corner are affected by the traveling wave effect significantly, and the large-span steel beams of platform canopies suffer from the largest traveling wave effect.
Keywords:railway station; super-long structure; traveling wave effect; apparent wave velocity; ratio of multiple support excitation and simple support excitation
*中國建設(shè)科技集團(tuán)科技創(chuàng)新基金項(xiàng)目(Z2016J05）。
作者簡介：范重，博士，教授級高級工程師，Email:fanz@cadg.cn。
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