Response of Precast Construction in Turkey during the 1999 Earthquakes

土耳其预制建筑在1999年地震中的反应1998年土耳其地震规范允许四种类型的预制建筑：抗弯矩框架、单层铰接框架、结构墙板以及预制抗弯矩框架与现浇结构墙(实心或连体)的组合。单层铰链框架在土耳其各地被用于工业设施。这种结构体系在最近的地震中表现不佳，包括1992年的埃尔津坎地震，1998年的杰伊汗地震，以及最近在伊兹米特和杜兹奇附近发生的地震。最近的经验表明，美国的预制结构也很容易受到地震破坏。在1994年的北岭地震中，停车结构的损毁程度高于预期。只有在对洛杉矶地区的预制停车结构进行详细评估后，才能确定损坏的原因。造成观察到的反应的许多因素在管理建筑规范中没有考虑到。拟议工作的目标是收集土耳其地区受1999年8月17日和11月12日地震影响的受损和未受损预制建筑的结构配置和连接细节的详细资料。收集的数据将进行评估，目标是降低美国和土耳其预制建筑的地震易损性。

ABSTRACTResponse of Precast Construction in Turkey during the 1999 EarthquakesThe 1998 Turkish Seismic Code permits four types of precast construction: moment-resisting frames, single-story hinged frames, structural wall panels, and combinations of precast moment-resisting frames with cast-in-place structural walls (solid or coupled). Single-story hinged frames are used throughout Turkey for industrial facilities. This type of structural system has not performed well in recent earthquakes, including the 1992 event in Erzincan, the 1998 event in Ceyhan, and the recent events near Izmit and Duzce.Recent experience has shown that precast structures in the U.S. are also vulnerable to earthquake damage. Parking structures were sustained damage at higher than anticipated levels during the 1994 Northridge earthquake. Only after detailed evaluation of precast parking structures in the Los Angeles area were the causes of the damage identified. Many factors that contributed to the observed response were not considered in the governing building codes. The goal of the proposed work is to collect detailed information about the structural configuration and connection details from damaged and undamaged precast buildings in the region of Turkey affected by the 17 August and 12 November 1999 earthquakes. Data collected will be evaluated with the goal of reducing the seismic vulnerability of precast construction in both the U.S. and Turkey.