（1 中国建筑设计研究院有限公司, 北京100044； 2  中国铁路设计集团有限公司, 天津 300142）

［摘要］雄安站站房主体结构平面布置呈矩形，南北方向总长度为606m，东西方向总长度为307-5m，采用混凝土框架结构。为了避免温度效应引起内力过大、混凝土容易开裂等问题，结合建筑功能，将主体结构划分为15个单元。为了满足建筑造型和防水构造等方面的需求，尽量减少大跨度屋盖结构分缝，站台雨棚采用下部多个混凝土结构单元+上部钢屋盖的结构形式，受力情况复杂。分别选取2组天然波和1组人工波，采用两种视波速对结构进行三向地震激励时程分析，并通过多点一致比γ的相关指标对结果进行分析。计算结果表明，对于上部钢结构质量与刚度远小于下部多个混凝土单元的结构形式，下部混凝土结构受到行波效应的影响较小，雨棚边、角部位的钢柱受行波效应的影响较大,雨棚大跨度钢梁受行波效应的影响最大。

［关键词］铁路站房； 超长结构； 行波效应； 视波速； 多点一致比

中图分类号：TU312， TU470文献标识码：A文章编号：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 

*中国建设科技集团科技创新基金项目(Z2016J05）。

作者简介：范重，博士，教授级高级工程师，Email:fanz@cadg.cn。