地震作用下PV支撐構架接頭變形行為模擬

Seismic Simulation of the PV Frame Joint Based on ABAQUS

王弘毅(Hong-Yi Wang)

指導教授 ： 謝尚賢

國立臺灣大學/工學院/土木工程學研究所/碩士(2016年)

https://doi.org/10.6342/NTU201603725

摘要

本研究基於國家地震工程研究中心之太陽光電 (photovoltaic，以下簡稱PV)棚架型支撐構架系統的振動台試驗。試驗用以觀察此鋁合金支撐構架在地震作用下之動力行為和破壞過程，并驗證了SAP2000結構模型合理簡化後，其結構模態分析與系統識別試驗所得試體自然頻率之結果非常接近，為該類結構進行耐震設計提供重要依據。雖然振動台試驗後試體無明顯破壞行為發生，但經仔細觀察後試體之其中一處接頭部分出現局部些微降服，而基於試驗後數據採集分析所得，結構自然頻率也在其中兩次人造地震波試驗中出現細微變化。
考慮到SAP2000 之模擬簡化了較多節點，從而無法了解接頭之力學行為，故本研究透過ABAQUS模擬PV棚架型支撐構架系統接頭部位在振動台試驗中之破壞形式，以分析試驗所採集之數據為基礎，還原試驗中可能出現之破壞形式，觀察接頭部位之輕微降服對於整體結構之影響。
ABAQUS對於PV棚架型支撐構架系統接頭部位之模擬與相應試驗數據吻合，破壞形式與試驗觀察接近，此ABAQUS模擬試驗破壞過程之方式也適用于類似振動台試驗。並基於數值模擬結果，為該類PV棚架型支撐構架系統之設計提供建議和參考，提高其安全性和可靠性。

關鍵字

太陽光電 ； 鋁結構 ； 振動台試驗 ； 模態分析 ； 數值模擬

並列摘要

The research is based on the shaking-table tests of the shed-frame type photovoltaic (PV) system in National Center for Research on Earthquake Engineering (NCREE). We observe the dynamic behavior and the failure process of the aluminum shed-frame structure under the earthquake in the tests. During the tests, the shed-frame structure does not collapse and has no obvious structural damage. The tests verify the results of the modal analysis by SAP2000 in this research, giving designers a good foundation on the aseismic design of such structure. However, a small gap is discovered at the middle column joint after the tests. Moreover, the data collected in the test show that the natural frequency of structure decreases in the tests. This phenomenon indicates the joint of structure yields after the tests.
Considering the simulation model of the joints are simplified in SAP2000, the research uses ABAQUS to analyze the detailed joint behavior of the shed-frame structure in this tests. Combined with experiment data and simulation by SAP2000, the simulation by ABAQUS verifies the failure process of the shed-frame structure in the tests and estimates the decreased frequency of the shed-frame structure under joint yielding status.
The simulation result based on ABAQUS shows that the failure process of the joint is close to what was observed in the shaking-table tests. The research approach to simulate the failure process of the joints by ABAQUS is effective in the seismic simulation. Based on the simulation results, the research makes some suggestions to improve reliability and safety of the shed-frame type PV system.

並列關鍵字

Photovoltaic ； Aluminum Structure ； Shaking-table Test ； Model Analysis ； ABAQUS Simulation

參考文獻

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