近场地震动作用下PC框架抗震性能影响因素
发布时间：2018-08-11 20:39
【摘要】：根据我国现行规范和规程设计三层两跨、六层两跨预应力混凝土(PC)框架各一榀,并在Open Sees中建立了其纤维单元分析模型。对该PC框架在近场脉冲型地震动和近场无脉冲型地震动作用下的抗震性能进行了分析,考察了脉冲效应、PGA、PGV/PGA、T_p/T对其响应的影响。结果表明:在近场脉冲型地震动作用下,PC框架所受损伤更为严重;结构响应与近场地震动PGA正相关,且PGA值相同时,PC框架在近场脉冲型地震动作用下的延性需求和基底剪力更大;PC框架所受损伤随PGV/PGA的增大经历了先增大(PGV/PGA≤0.1)、再减小(0.1PGV/PGA≤0.25)、最后再增大(PGV/PGA0.25)三个阶段;PC框架所受损伤随着T_p/T的增大经历了先增大(T_p/T≤2)、再减小(2T_p/T≤4.5)、最后趋于平稳(T_p/T4.5)三个阶段,且T_p/T=2时所受损伤最为严重。
[Abstract]:According to the current code and code of our country, we designed one (PC) frame with three stories, two spans and six stories, and set up its fiber element analysis model in Open Sees. The seismic behavior of the PC frame under near-field pulsed ground motion and near-field pulsation-free ground motion is analyzed, and the effect of pulse effect on the response of PGA-PGV / PGA-T / T is investigated. The results show that the damage of PC frame is more serious under the action of near-field pulsed ground motion, and the structural response is positively correlated with the near-field ground motion PGA. When the PGA value is the same, the ductility requirement of PC frame under near-field impulse ground motion and the damage of PC frame subjected to larger base shear force go through three stages: PGV/PGA increasing (PGV/PGA 鈮，
本文编号：2178175
[Abstract]:According to the current code and code of our country, we designed one (PC) frame with three stories, two spans and six stories, and set up its fiber element analysis model in Open Sees. The seismic behavior of the PC frame under near-field pulsed ground motion and near-field pulsation-free ground motion is analyzed, and the effect of pulse effect on the response of PGA-PGV / PGA-T / T is investigated. The results show that the damage of PC frame is more serious under the action of near-field pulsed ground motion, and the structural response is positively correlated with the near-field ground motion PGA. When the PGA value is the same, the ductility requirement of PC frame under near-field impulse ground motion and the damage of PC frame subjected to larger base shear force go through three stages: PGV/PGA increasing (PGV/PGA 鈮，
本文编号：2178175
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