Clarification of Impulsive Failure in Structural Damage due to the Hyogoken-nanbu Erathquake

兵库县南部地震造成的结构损坏中的脉冲破坏的澄清

• 批准号: 10450205
• 负责人: NONAKA Taijiro
• 金额: $ 8.7万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450205/
• 关键词: Aseismic design; Shock analysis; Brittle fracture; Earthquake damage; Wave-propagation analysis; Dynamic design; Hyogoken-nanbu earthquake; 衝撃; 地震; パルス; 破壊; 損傷; 構造物

In order to investigate the possibility that some of structural damages due to the Hyogoken-nanbu Earthquake were caused by impulsive action of the earthquake, a cooperative research group was formed in Architectural Institute of Japan, and have derived to date such results as follows :1.Significant structural damage such as steel fracture experienced at Ashiyahama residential complex cannot be caused by such conventional seismic waves as adopted in ordinary structural design, but by the seismic save which would have occurred at the site.2.Pertinent earthquake resistance cannot be maintained through simultaneous occurrence of plastic hinges in an identical story. The number of the occurrence of plastic hinges should be limed for structural reliability against earthquakes.3.The post-cracking behavior of a structural frame depends not only on the circumferential condition near the crack but also on the over-all configuration and loading condition of the frame.4.Such a high strain-rate and plastic pre-strain as occur in impulsive loading reduce fracture toughness of a steel member significantly.5.There is a possibility that past earthquake records do not contain high-frequency contents to sufficient accuracy.

为了研究兵库县南部地震造成的部分结构损坏是由地震的冲击作用引起的可能性，日本建筑研究所成立了一个合作研究小组，迄今为止得出了以下结果：1.芦屋滨住宅区发生的钢筋断裂等重大结构破坏，不可能由普通结构设计中采用的常规地震波引起，2.在同一层中同时出现塑性铰不能保持相应的抗震能力。为了保证结构的抗震可靠性，应限制塑性铰出现的次数。3.结构框架的开裂后行为不仅取决于裂缝附近的周向条件，还取决于框架的整体构造和加载条件。4.如此高的应变率和塑性预变形。在冲击荷载作用下产生应变会显著降低钢构件的断裂韧性。5.过去的地震记录可能没有足够准确地包含高频内容。

项目成果

Nonaka,T.: "Shear failure of a steel member due to a blast"Internatinal Journal of Impact Engineering. 24・3. 231-238 (2000)

Nonaka, T.：“爆炸引起的钢构件剪切破坏”，《国际冲击工程学报》24・3（2000 年）。

Uetani,K.: "Earthquake response analysis of steel building frames considering brittle fractures at member-ends"Proceedings of the 1999 Structures Congress, ASCE. 406-409 (1999)

Uetani,K.：“考虑构件末端脆性断裂的钢建筑框架的地震响应分析”1999 年结构大会论文集，ASCE。

高畠秀雄: "芦屋浜高層住宅の被害原因の解明と耐震性の向上についての提言"都市直下型地震による構造物の衝撃破壊の解明と防止策に関するワークショップ. 論文集. 172-181 (1999)

高畠秀雄：“芦屋滨高层住宅损坏原因的阐明和提高抗震性的建议”研讨会，阐明城市地震造成的结构冲击破坏和预防措施（1999年）。 ）

高畠秀雄: "芦屋浜高層住宅の被害事例から得た耐震設計法の改善"(続)兵庫県南部地震における構造物の衝撃破壊に関するシンポジウム. 論文集. 21-30 (2000)

Hideo Takabatake：“从芦屋滨高层住宅建筑损坏案例中学到的抗震设计方法的改进”（续）兵库县南部地震期间结构冲击破坏研讨会论文集。

Takabatake, Hideo: "An Earthquake-Resistant Design Improved form Damage o Ashiyahama Residentiak Building"Symposium II on Damage to Structures by Impulsive Effects of the Hyogoken-Nanbu Earthquake, Architectural Institute of Japan. 21-30 (2000)

Takabatake，Hideo：“抗震设计改进了 Ashiyahama 住宅建筑的形式损坏”研讨会 II，关于兵库县南部地震的脉冲效应对结构的损坏，日本建筑学院。