【摘要】：根據(jù)我國現(xiàn)行規(guī)范和規(guī)程設計三層兩跨、六層兩跨預應力混凝土(PC)框架各一榀,并在Open Sees中建立了其纖維單元分析模型。對該PC框架在近場脈沖型地震動和近場無脈沖型地震動作用下的抗震性能進行了分析,考察了脈沖效應、PGA、PGV/PGA、T_p/T對其響應的影響。結果表明:在近場脈沖型地震動作用下,PC框架所受損傷更為嚴重;結構響應與近場地震動PGA正相關,且PGA值相同時,PC框架在近場脈沖型地震動作用下的延性需求和基底剪力更大;PC框架所受損傷隨PGV/PGA的增大經(jīng)歷了先增大(PGV/PGA≤0.1)、再減小(0.1PGV/PGA≤0.25)、最后再增大(PGV/PGA0.25)三個階段;PC框架所受損傷隨著T_p/T的增大經(jīng)歷了先增大(T_p/T≤2)、再減小(2T_p/T≤4.5)、最后趨于平穩(wěn)(T_p/T4.5)三個階段,且T_p/T=2時所受損傷最為嚴重。
[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，

本文編號：2178175