Seismic Response Analysis Of Suspending Pipeline And Its Performance-Based Seismic Design

Pipeline transport is an important measure in energy transposition. Inevitably, Suspend pipeline as the most important constitutes of long pipeline project is built in frequent earthquake area, as china is a frequent earthquake country. Analysis of dynamic behavior, seismic response and seismic design has become the most important problem in the suspend pipeline project, because of its big flexibleness, low damp and low natural frequency of vertical, horizontal bending and torsion vibration.Performance-based seismic design is an advanced subject in civil engineering seismic design research field, in the aspect of RC structure, three-level performance design, seismic damage calculation method and PBSD method has been brought out, But the research conclusion about suspend pipeline in PBSD hasn't been reported. Therefore, this paper on the basis of this theory, mainly includes the following four parts:Chapter one: The evolvement of the pipeline seismic design and PBSD is discussed, the main research of this paper is put forward here.Chapter two: The calculate method of dynamic behavior of suspend pipeline is discussed briefly, calculating method of dynamic behavior and calculating model which suitable to the suspending pipeline is received.Chapter three: Numerical model of cable suspend pipeline is established by ANSYS finite element analysis program. The dynamic behavior of cable suspending pipeline is analyzed, natural frequency and vibration mode are get, and the reason of the error between the theory and enumerate result is analyzed, which prove the correctness of this analysis method. Seismic response of the suspend pipeline in different earthquake intensity and different sites is dealing by inputting seismic wave; various seismic response of the suspend pipeline is given out, which offered theory basis to the PBSD of suspending pipeline.Chapter four: Seismic damage model is established, PBSD method of suspending pipeline is initially given out.The purpose of the theory and utility value of this paper are as follow:1. The dynamic behavior and different seismic response of the suspend pipeline is scored, which offered the basis of the theory to the PBSD of this structure.2. Performance-based seismic design method of suspend pipeline is preparatory given out.