本文分析架設於高樓之塔式起重機與設備,因為其架設於高樓,會有地震輸入放大的效應,因此所受地震力比架設於地面時大,本文對較重之塔式起重機與較輕之設備進行分析。 首先,分析塔式起重機架設於高層建築物,塔式起重機質量非常大,當地震來時,塔式起重機會與建築物有互制的現象,所以分析時無法分開分析,塔式起重機要與建築物整體分析,本文將建立之符合實際情況之分析模式,並做若干合理的假設,由此進行非線性動力分析。 其次,設備質量較輕,與建築物之分析可分開分析,可先求得設備所在樓版之最大絕對加速度,再將設備置於樓版之上,根據樓版反應譜,就可得知設備所受之力。對於樓版之最大絕對加速度,本文發展出簡單估計的方法,並建立符合實際建築物之結構分析模式,進行較準確之非線性歷時分析與簡單估計對照,而樓版之反應譜,則由對結構分析模式所作之歷時分析可得,最後,做非線性靜力分析,看設備於設計地震下,所到達之性能點為何。
The study is to analyze cranes and equipments on high buildings. Because they are loaded on high buildings, there is a effect of magnification in earthquake input. So, they get more earthquake force loaded on high buildings rather than ground. This study gives an analysis on the heavy cranes and the light equipment. First, we analyze crane on high buildings. Mass of crane is huge ,so it may interact with the building under the earthquake. To analysis the crane, we have to connected it with the building and analysize them as a whole. This study creates a analytical model which conforms with reality, and nonlinear history analysis is made on it with some reasonable assumptions. Second, the equipment gets less mass, so it can be analysized separately with the building. We may first find the greatest absolute acceleration of the floor where the equipment is, and then find the force on the equipment according to the floor spectrum. We give a simple estimation for the greatest absolute acceleration of the floor, and compare them with the history analysis made on the structural analytical modal.We also find out the floor spectrum according to the modal. Lastly, the nonlinear static analysis is made in order to see where the performance point of the building reaches.