Nippon Steel Coated Sheet Corporation

Nippon Steel Corporation

Mitsuhiko Yazaki

Kiyokazu Harada

Yoshio Kayama

Hiroaki Sakamoto

Yasuhiro Nakata

Toru Inaguma

Atsushi Matsushita

Tomoyuki Kawazoe

Yuuji Yamano

Yoshinori Suenaga

The structure includes a panel and upper and lower mounting units. The panel includes plate members, a rectangular frame spacer, and a core member. Right and left frame parts of the spacer are configured as straight tubular side spacers. Each of the upper and lower mounting units includes: a fixing plate to be fixed onto the upper or lower frame part of a building; mounting members connected inside respective upper or lower end portions of the side spacers such that the mounting members are slidable in an upward/downward direction; and coupling members coupling the mounting members to the fixing plate. Each of the coupling members runs, in a rightward/leftward direction, through an associated one of the mounting members and the fixing plate to couple the associated mounting member rotatably with respect to the fixing plate.

Structure for mounting louver panel

A sandwich panel includes a first plate member and a second plate member, each of which is metallic, a spacer unit which is metallic and formed in the shape of a rectangular frame, and a core member. The core member is arranged in a region surrounded with the spacer unit between the first plate member and the second plate member. The spacer unit is made up of a plurality of spacers that are formed as separate members. The first plate member and the second plate member are bonded to the core member and each of the plurality of spacers.

Sandwich panel

In a method of diagnosing the fatigue life of structural steelwork according to the present invention, a Barkhausen noise measurement is performed under the condition of 5 .mu.m.ltoreq.d.ltoreq.1 mm where d is the detection depth of Barkhausen noise, by using a magnetic head constituted by an air-core coil detection head and a magnetic excitation head obtained by winding a copper wire such as an enameled wire on a U-shaped core made of a soft magnetic material such as a silicon steel sheet or an amorphous magnetic material. The degree of fatigue damage of a target measurement portion is diagnosed using the root-mean-square (RMS) voltage or voltage amplitude value of the Barkhausen noise. According to this method, the degree of fatigue and degradation by stress and strain in the structural steelwork can be accurately diagnosed prior to development of cracking without any limitation on diagnostic locations. A member of steelwork having a life diagnostic function is obtained by mounting the above magnetic head on a brace- or wall-like vibration-damping device made of very low-yield steel. According to this member of steelwork, the wall or covering material of a bridge or the like need not be removed even in practicing a fatigue life diagnosis. The degree of fatigue degradation in structural steelwork can be easily and accurately diagnosed prior to development of cracking even in a location where an operator cannot access due to the structural limitation.

Method of diagnosing fatigue life of structural steelwork and a member

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Tokyo, Japan

Mitsuhiko Yazaki