Research on Development of New Type of Absorbing System to Increase Anti-Impact Capacity of Constructed Rock-Sheds

提高人工岩棚抗冲击能力的新型吸能系统开发研究

基本信息

批准号：
07555139
负责人：
MATSUOKA Ken-ichi
金额：
$ 3.58万
依托单位：
Muroran Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555139/
关键词：
absorbing system impact load rock falling RC rock-shed PC rock-shed sand cushion three-layred absorbing system four-layred absorbing system

项目摘要

At present, a sand cushion is set onto the roof of rock-shed to decrease and to disperse the impact load due to rock falling. However, according tothe results from prototype steel weight falling tests onto the sand cushion, it was made clear that the sand cushion do not possess much absorbing and dispersing capacities against impact load and rock-sheds designed based on the impact load estimation with the empirical equation do not have much safety margin against rock falling assumed in design. Then common used rock-sheds should be taken effective counter measures to increase the safety margin.From this point of view, in this study, development and practical use of a new absorbing system envisioned with about two times absorbing capacity than that of the sand cushion, were tried. The project was composed of following research items :1) Researches on anti-impact behavior of RC/PC members in rock-shed structures by using prototype impact tests ;2) Researches on impact behavior of RC/PC ro … More ck-sheds with two types of obsorbing system, namely sand cushion and three-layred absorbing system ;3) In order to improve absorbing capacity of constructed rock-sheds with sand cushion against rock falling impact load, proposal of a four-layred absorbing system composed of the three-layred absorbing system and an additional sand cushion left on the roof ;4) Investigation on the practical applicability of the four-layred absorbing system in which prototype RC and Steel rock-sheds with the four-layred absorbing system were used in steel weight falling tests.The results obtained from this project were mainly summerized as follows :1) Impact behaviors of RC/PC members and RC/PC rock-sheds with sand cushion and/or three-layred absorbing system were made clear according to the results obtained from prototype imopact tests ;2) According to the results on impact behavior of RC/PC rock-sheds with the two types of absorbing system (sand cushion and three-layred absorbing system) by means of three-dimensional impact analysis method, many valuable data to establish a rational anti-impact design specification for rock-shed structures were made available ;3) It can be shown that the four-layred absorbing system proposed here to improve absorbing and dispersing capacities of constructed rock-sheds was superior to other system mechanically and economically. Less

目前，将沙垫设置在岩石棚的屋顶上，以减少并分散由于岩石下降而引起的冲击负荷。然而，根据原型钢重量下降测试的结果，可以清楚地表明，基于对冲击负荷估算的撞击负荷和岩石射击，砂垫没有太多的吸收和分散能力，其经验方程并没有太多的安全保障在设计中具有太多的安全性。然后，应采取有效的反击措施，以提高安全边缘。从这项研究的角度来看，在这项研究中，开发和实际使用新的吸收系统的吸收能力大约是沙垫的两倍。该项目由以下研究项目组成：1）通过使用原型影响测试对RC/PC成员在岩石结构中的抗爆炸行为进行研究； 2）研究对RC/PC RO的影响……更多具有两种类型的CK射击行为，两种类型的迷恋系统，即砂垫和三层吸收系统； 3）摇摆不定的摇滚，以改善岩石造成的摇滚量，以改善摇滚的摇滚，使摇滚床造成了摇滚的运行，可用于摇滚，使其成为摇滚乐的储备。一个由三层吸收系统组成的四层吸收系统和屋顶上留下的额外的沙垫； 4）对四层吸收系统的实际适用性进行调查，在该系统中，RC和钢岩石带有原型RC和钢岩石带有四层吸收系统的钢降落系统中的钢制降低测试中使用了该项目的降低和夏季的效果，以下是按照夏季/行为的行为：1）行为：1）rapips：1）rapips：1）rapie：1）rapie：1）rapie：1）rapie：1）rapie：1）rapie：1）根据从原型iMopact测试中获得的结果清楚地清楚地清楚地弄清了带有沙垫和/或三层吸收系统的岩石； ; 3）可以证明，这里提出的四层吸收系统以提高构造的岩石的吸收和分散能力在机械和经济上优于其他系统。较少的