台灣位處地震頻繁地區，建築結構耐震能力隨著法規之修正，而有顯著提升。但由各震損報告中可知，建築物主結構物尚未破壞時，非結構物損壞案例已頗多。其中，懸吊式輕鋼架天花板為最常遭受震害的非結構物之一。遭受破壞之懸吊式輕鋼架天花板系統，大多受限於耐震工法技術之缺乏及骨架構造強度不足，而未採用任何耐震措施。因此，美國材料試驗協會及內政部建築研究所乃制定相關之規範，提供耐震工法以及骨架構造之基本強度試驗，來提升懸吊式輕鋼架天花板系統之耐震能力。本研究以美國ASTM E580及TAGSC規範中對耐震天花板所規定之作法，以及國內目前常見工法，建立三組試體進行材料特性試驗、振動台試驗以及電腦模擬，來探討各種不同懸吊式輕鋼架天花板系統之耐震能力，所得結果將可供國內之施工方式及修訂規範時的參考。
歸結本研究所得之重要結論如下：
1）在振動台試驗中可得，依ASTM規範要求施作之天花板試體在輸入AC156 960gal之震波後，無損壞情形出現，可通過國內耐震法規要求。依TAGSC規範要求施作但骨架接頭拉力強度不足之天花板試體，在輸入AC156 960gal震波後，出現板材掉落情形。依國內目前常見工法所施作之天花板試體，在輸入AC156 600gal震波後，出現骨架接頭鬆脫情形。
2）在振動台試驗中，收邊元件、斜撐組及固定連桿等措施，能增加懸吊式天花板系統之耐震效能。
3）在材料特性試驗中，可知骨材接頭強度低於其斷面強度，故骨架破壞由接頭部位控制之。並由材料特性試驗與振動台試驗所得之應變數據進行換算後，可知規範要求骨架接頭強度應達80kgf實屬合理。
4）由電腦模擬中，進行各組不同面積之模型軸力分析後，可知由地震力所造成之軸力分佈，其中之較大者出現在斜撐組附近與骨架鉸接端。

the Building structures in Taiwan have been strengthened along with the provision improvement in the building codes. However, the reconnaissance reports after some minor to moderate earthquakes revealed that nonstructural components are easily damaged before the structural failure occurrs. Among all nonstructural components, the suspension ceiling is one of the most often damaged systems, due to the strength of the suspension systems weren’t robust enough and no any aseismic measure has been applied to them. Therefore, in order to increase the aseismic capability of the ceiling suspension system, the American Society for Testing and Materials (ASTM) and the Architecture and Building Research Institute, Taiwan, have issued ASTM E580 and TAGSC, respectively, as the installation standards for the practitioners to follow. In this paper, both the numerical analysis and the experimental studies, including the shake table and the material tests, were performed to investigate the seismic behaviors of the suspension ceiling systems. In the shake table experiments, the excitation inputs were tri-axial and compatible to the AC156 response spectrum, the acceptable criterion for seismic qualification by shake table tests on the nonstructural components. To compare the difference among the systems following the ASTM E580, TAGSC, and the common assembling without considering any aseismic measure, three specimens were tested. The result may be used for further improvement of the provisions in the TAGSC.
After the research process, the testing and analytical results yielded some main findings as following:
1.The shake table testing results showed that the ceiling specimen installed following the ASTM E580 could resist the 960gal AC156 excitation without any damage; Some panels of the TAGSC specimen dropped at the 960gal input, due to the strength of the elements (main-tee or cross-tee) in its suspension system didn’t meet the requirement. For the third specimen installed without any aseismic measure, its suspension system detached and severely damaged at the 600gal AC156 excitation.
2.In the shake table experiments, the perimeter fixing devices, lateral force bracing, and the strut stabilizers for keeping the perimeter components from spreading apart played important roles in enhancing the seismic performance of the ceiling suspension systems.
3.The material testing results revealed that the section strengths of the main-tee and cross-tee elements were stronger than that of their joint connectors; therefore the joint strengths determined the damage threshold of the ceiling specimens. From the experimental data, it was found the requirement of 80kgf in the ASTM E580 for the joint strength is rational.
4.From the numerical analysis on the suspension ceiling systems with different ceiling areas, it revealed that the maximum axial forces of the suspension elements occurred at two locations: the first one is the joint where bracing installed, and the other is the edge with perimeter fixing devices.

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