地铁爆破施工对装配式建筑物与现浇式建筑物影响响应对比分析Comparative analysis of response of metro blasting construction to prefabricated buildings and cast-in-place buildings
于广明;樊延祥;杨馨茹;赵建锋;孙超;雷刚;高亚男;
摘要(Abstract):
地铁工程一般修建于主城区,其中爆破施工对穿越地面既有建筑物造成严重的振动影响,然而不同类型的建筑物对这种振动响应不同,从感性认识来讲,近些年发展起来的装配式建筑物可能对这种振动响应更加敏感.为了探究装配式建筑物在地铁爆破施工振动影响下的行为,在SAP2000中分别建立装配式建筑物与现浇式建筑物模型,模拟不同工况下装配式建筑物与现浇式建筑物的模态、振动速度、振动加速度、位移和应力变化的特点,并将二者的动力响应行为进行对比分析.分析结果可用来指导地铁工程安全爆破施工,以便更好地保护装配式建筑物.研究表明:装配式建筑物与现浇式建筑物的振动速度、振动加速度、位移和应力变化趋势相同,现浇式建筑物的振速、加速度和位移分别为装配式建筑物的84.4%,86.4%和83.7%,现浇式建筑物的梁、柱子、楼板应力值约为装配式建筑物应力值的89.5%,节点应力值为装配式建筑物应力值的87.4%;装配式建筑物的自振频率为4~6Hz,现浇式建筑物的自振频率为5~9Hz.
关键词(KeyWords): 地铁爆破;爆破振动;装配式建筑物;现浇式建筑物
基金项目(Foundation): 国家自然科学基金国际(地区)合作与交流项目(52011530035)
作者(Author): 于广明;樊延祥;杨馨茹;赵建锋;孙超;雷刚;高亚男;
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参考文献(References):
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