The Influence Of Glass Curtain Wall And Infill Wall To The Dynamic Performance Of Base-isolated High-rise Steel Frame Structure

Investigations for recent destructive earthquakes show that the direct loss causedby the damage of nonstructural components (NSC) such as partition wall, ceiling system,pipe line, attached equipment, furniture, and so on in buildings reaches up to79%of thetotal economic loss of earthquake. The damage of NSC can bring not only threat to lifeand property of the residents, but also to gas leakage, fire and other secondary disasters,as well obstacle to emergency search and rescue activities, and cause a large number ofbuildings to be “standing ruins” or “dangerous buildings” with structural elementsalmost intact but totally out of function, especially the local hospitals,telecommunication centers, governments and fire departments losing the function ofemergency rescue, communication, command or firefighting activities, andconsequently causing enterprises and businesses interruption as well as inevitabletrauma to communities social life. The2011global nuclear crisis caused by thedysfunction of the diesel generator-set for earthquake emergency response in theFukushima nuclear power plant during the M9.0earthquake and tsunami in Japan isenough to remind the importance of the NSC safety to the building and even to thesociety. So the study on the influence of NSC to the building structures should have animportant theoretical significance and engineering application value. For this subject,this paper mainly includes the following research:1. Literature review on the references about researches of nonstructuralearthquake damage and how to reduce the risks of NSC damage in earthquakes issummarized. Through comparative study to the differences of the relevant specificationsabout the seismic design of NSC in the codes of three representative countries includingChina, the United States, and Japan, the deficiencies and the urgent key issues needed tobe solved about how to reduce the risks of NSC earthquake in codes of China aresummarized and suggested.2. Glass curtain wall and infill wall are two types of indispensable NSC forrealizing the functionality of buildings, but in current China Code for seismic design ofBuildings, only principle specifications are available for NSC design. In this thesis, a setof simplified models is proposed for simulating the glass curtain wall, the semi-rigidinfill wall, and the flexible infill wall by using the finite element software SAP2000.3. Based on the field test data observed in the dynamic field for a15-storey rubberbearing base isolated steel structure office building located at Kunming city, fourcomparative finite element models include a bare frame model in considering of themass of NSC not the interaction between the NSC and the steel frame which are usuallyadopted in design practice, a frame model with element to simulate the glass curtainwall, a frame model with element to simulate the infill wall，and a frame model withelements to simulate both the glass curtain wall and infill wall. The acceleration anddisplacement responses of the actual structure in the field test are numerically simulated and compared with the test data with four models respectively. Correspondingly, theinfluence of the glass curtain wall and the infill walls with different rigidity to thevibration mode, the overall response and the local element inner force of the framestructure are compared respectively.4. By comparing with the test results, the reasonability and the reliability of theelement model suggested in this thesis to simulate the glass curtain wall and the infillwall are verified. The tentative method to simulate the glass curtain wall, semi-rigidinfill wall and the flexible infill wall are respectively proposed for seismic design andanalysis of steel frame structure.