Internal Pounding between Structural Parts of Seismically Isolated Buildings
Internal Pounding between Structural Parts of Seismically Isolated Buildings
复制标题
隔震建筑物结构件之间的内部撞击
DOI：
10.1080/13632469.2020.1866122
复制
发表时间：
2021
影响因子：
2.6
通讯作者：
R. Labernarda
中科院分区：
文献类型：
--
作者：
F. Mazza;R. Labernarda
摘要隔震结构的水平变形能力大，可能导致隔震结构内部构件之间发生碰撞。为了研究这个研究不足的问题，一个钢筋混凝土（r.c.）考虑了一个建造在西西里（意大利）的框架结构，其隔震体系为弹性支座和滑动支座相结合的混合隔震体系。该建筑包括地下室，共四层，电梯钢架结构跨越隔离层。电梯井考虑了两种结构配置：基础隔离，与周围建筑物刚性连接;固定基础，具有地震间隙以防止内部撞击。意大利和欧洲的代码规定的有效性，根据设置足够的间隔距离，进行评估。四个建模假设的高度非线性行为的弹性轴承进行检查和数学模型的实验数据进行校准。对试验结构进行了非线性地震分析，考虑了八种情况，这些情况是结合电梯的四个位置（即，在地下室和上部三层）和两种负载条件（即，电梯空载且具有最大负载）。电梯井的不对称位置引起的扭转效应通过极坐标图来量化，表示双向地震的所有激励角的临界包络线。
ABSTRACT Pounding among internal structural parts of seismically isolated structures may happen because of high horizontal deformability of the isolation system. To study this poorly investigated issue, a reinforced concrete (r.c.) framed structure built in Sicily (Italy) is considered, with a hybrid isolation system combining elastomeric and sliding bearings. The building consists of four-storey, basement included, with the steel-framed structure of the elevator crossing the isolation level. Two structural configurations are considered for the elevator shaft: base-isolated, with rigid link to the surrounding building; fixed-base, with a seismic gap to prevent internal pounding. Effectiveness of the Italian and European code provisions, based on setting up adequate separation distance, is assessed. Four modelling assumptions of the highly nonlinear behavior of elastomeric bearings are examined and a mathematical model is calibrated on experimental data. Nonlinear seismic analysis of the test structure is carried out considering eight cases, which are obtained combining four position of the elevator (i.e., at the basement and upper three levels) and two load conditions (i.e., elevator empty and with maximum load). Torsional effects induced by an asymmetric position of the elevator shaft are quantified by means of polar plots, representing the critical envelope for all excitation angles of bi-directional earthquakes.
影响因子：
4.5
作者：
K. Ishii;M. Kikuchi;T. Nishimura;C. Black
通讯作者：
K. Ishii;M. Kikuchi;T. Nishimura;C. Black