【摘要】 研究目的:某大型火车站建于上世纪90年代中期,由于高架层候车功能不足,需进行加层改造。针对高架车站结构的特点,本文提出贴建和新建两个加层方案,从铁路限界、合理使用年限、抗震设计使用标准、抗震鉴定加固、工程可实施性几方面进行细致的比选研究工作,为今后类似铁路高架车站改造工程提供借鉴。研究结论:(1)既有车站加层不同于一般民建建筑改造,要考虑车站运营、工期、造价等因素;(2)应对原建筑结构进行可靠性和抗震能力鉴定,并根据鉴定结果制定合理使用年限及抗震设计使用标准,进而确定合理加层方案;(3)原有结构的抗震鉴定加固是设计的关键所在,是设计研究的重点;(4)加层方案最终确定了新建方案,回避了对既有高架层结构大面积抗震加固问题,确保了站房加层的可实施性。更多还原

【Abstract】 Research purposes: A railway station was built in the mid-1990s of 20 century,and it is necessary to conduct the reconstruction work of storey-adding of its overhead waiting room because of the insufficiency of functions of the waiting room.The two reconstruction schemes of reforming the existing frame structures and building new steel structures for storey-adding were put forward and the study was done on selection of the reconstruction schemes from the areas of the railway clearance,reasonable service life,standard for seismic design,seismic evaluation and reinforcement and engineering feasibility for providing the reference to the similar works.Research conclusions:(1) The storey-adding of the existing railway station is different from the reconstruction of civil architecture because the station operation,construction period and construction cost should be considered.(2) The reliability and seismic capacity of the existing building structure should be evaluated.According to the evaluation results,the reasonable service life and the standard for seismic design should be selected for determining the storey adding scheme.(3) The seismic evaluation and reinforcement of the existing structure are crucial to the design and design study.(4) The scheme of building new structures was chosen and it avoided the large seismic reinforcement of the overhead structure and ensured the feasibility of the storey-adding project.更多还原