公开(公告)号：US09534411B2

公开(公告)日：2017-01-03

申请号：US14710901

申请日：2015-05-13

Applicant: Kurosawa Construction Co., Ltd.

Inventor： Ryohei Kurosawa

IPC: E04B1/98 ,  E04H9/02 ,  E04H12/16 ,  E04C3/34 ,  E04C5/01 ,  E04B1/22

CPC classification number: E04H9/021 ,  E04B1/22 ,  E04B1/98 ,  E04C3/34 ,  E04C5/012 ,  E04H9/02 ,  E04H9/025 ,  E04H12/16

Abstract: In an earthquake resisting design method of a PC construction, a column and a beam, which are high-strength precast prestress concrete members, are joined by binding juncture with a prestressing tendon. A grout is filled and bonded. A first stage linear resilient design is employed, where all construction members are not damaged, for earthquakes up to a predetermined earthquake load design value. A second stage linear resilient design is employed, where earthquake energy is absorbed by breakage of the bond of the grout, and principal construction members are not damaged, for earthquakes exceeding the predetermined earthquake load design value. By employing a non-linear resilient design in which the first stage linear resilient design and the second stage linear resilient design are combined, an earthquake-resisting design level is significantly increased, and the construction can resist earthquakes exceeding a seismic intensity 6 upper.

Abstract translation: 在PC结构的抗震设计方法中，作为高强度预制预应力混凝土构件的柱和梁通过结合接合处与预应力筋连接。 灌浆和灌浆。 采用第一级线性弹性设计，其中所有建筑构件都不被破坏，用于达到预定的地震载荷设计值的地震。 采用第二级线性弹性设计，其中地震能量被水泥浆粘结破坏所吸收，主体构件不会受到破坏，超过预定的地震荷载设计值。 通过采用第一级线性弹性设计和第二级线性弹性设计组合的非线性弹性设计，大大提高了抗震设计水平，并且该结构可以抵抗超过地震烈度6以上的地震。

公开(公告)号：US10378197B2

公开(公告)日：2019-08-13

申请号：US15800718

申请日：2017-11-01

Applicant: KUROSAWA CONSTRUCTION CO., LTD.

Inventor： Ryohei Kurosawa ,  Shigeru Hyakutake ,  Hitoyuki Takagi

IPC: E04B1/18 ,  E04B1/30 ,  E04B1/98 ,  E04C5/08 ,  E04H9/02 ,  E04B5/29 ,  E04C5/06

Abstract: A method is provided for jointing a concrete column and an iron beam. A structure joint portion is provided between a column-beam junction and an end of the iron beam, which is mourned on a coning provided to the column. Prestressing tendons are arranged in plural rows to horizontally penetrate the column-beam junction, Tension-introduction forces are applied to the prestressing tendons to tensionally anchor an anchor plate, and thereby to integrally joint the column and the beam.

公开(公告)号：US20130269308A1

公开(公告)日：2013-10-17

申请号：US13740526

申请日：2013-01-14

Applicant: KUROSAWA CONSTRUCTION CO., LTD.

Inventor： Ryohei KUROSAWA ,  Kei HIRAI

IPC: D07B1/02

CPC classification number: D07B1/02 ,  D07B1/0693 ,  D07B7/185 ,  D07B2201/2006 ,  D07B2201/2011 ,  D07B2201/2012 ,  D07B2201/2013 ,  D07B2201/2044 ,  D07B2201/2046 ,  D07B2201/2051 ,  D07B2201/2059 ,  D07B2201/2065 ,  D07B2205/306 ,  D07B2205/3064 ,  D07B2205/3067 ,  D07B2205/3071 ,  D07B2207/404 ,  D07B2207/4059 ,  D07B2301/10 ,  D07B2301/45 ,  D07B2401/2025 ,  D07B2501/2023 ,  D07B2801/12 ,  D07B2801/18 ,  D07B2801/60

Abstract: In order to provide a double rustproof PC strand with superior durability and semi-permanent rustproof performance, a core wire and surrounding wires are formed of wires subjected to a wire drawing treatment and a plating treatment and formed with a plated layer, and a rustproof treatment is applied by forming a synthetic resin coat on an outer peripheral surface thereof. In order to uniformize and regulate the twisting pitch, the core wire and the surrounding wires are adjusted under the conditions of (A) Diameter of CORE: 4.42±0.05 mm, Diameter of Surrounding wire: 4.25±0.05 mm, (B) Diameter of CORE: 5.22±0.05 mm, Diameter of Surrounding wire: 5.06±0.05 mm, or (C) Diameter of CORE: 5.40±0.05 mm, Diameter of Surrounding wire: 5.25±0.05 mm, and then twisted, and the tensile strength is 1850 N/mm2 or higher.

Abstract translation: 为了提供具有优异的耐久性和半永久性防锈性能的双重防锈PC绞线，芯线和周围的线由经过拉丝处理和电镀处理的电线形成，并且形成有镀层，并且防锈处理 通过在其外周面上形成合成树脂涂层来施加。 为了使捻距均匀化和调节，在（A）直径CORE为4.42±0.05mm，周围线直径为4.25±0.05mm的条件下，对芯线和周围线进行调整，（B）直径 核心：5.22±0.05mm，周围线直径：5.06±0.05mm，或（C）直径CORE：5.40±0.05mm，周围线直径：5.25±0.05mm，扭转，拉伸强度为1850 N / mm2以上。

公开(公告)号：US08191251B2

公开(公告)日：2012-06-05

申请号：US13125980

申请日：2010-04-14

Applicant: Ryohei Kurosawa ,  Kei Hirai

Inventor： Ryohei Kurosawa ,  Kei Hirai

IPC: H01R43/00

CPC classification number: E04C5/08 ,  B05D1/06 ,  B05D3/0218 ,  B05D3/0254 ,  B05D7/20 ,  D07B7/145 ,  D07B7/185 ,  D07B2201/2012 ,  D07B2201/2023 ,  D07B2201/2059 ,  D07B2201/2065 ,  D07B2205/206 ,  D07B2207/4059 ,  D07B2207/4068 ,  D07B2401/2025 ,  D07B2501/2023 ,  D07B2501/203 ,  E04C5/015 ,  Y10T29/49165 ,  Y10T29/49194 ,  Y10T29/49195 ,  Y10T29/49199 ,  Y10T29/49201 ,  Y10T29/49224 ,  D07B2801/60 ,  D07B2801/12 ,  D07B2801/18

Abstract: A PC strand is untwisted to separate surrounding wires from a core wire, a synthetic resin powdered coating material is uniformly adhered by being applied and heated over the outer periphery of the core wire and surrounding wires in this untwisted state, the product is cooled to form a resin film, and then the surrounding wires are twisted back to the original state with respect to the core wire. Pre-heating is performed before the coating step and post-heating is performed after the coating step, the pre-heating temperature is set 30 to 130° C. higher than the post-heating temperature, a synthetic resin powdered coating material having an average grain size of 40 to 50 μm is used, and the process line speed is 5 to 10 m/min.

Abstract translation: 将PC绞线解除缠绕，将芯线与芯线分开，将合成树脂粉末涂料均匀地粘贴在芯线和周围线材的外周上，并将其加热至未扭转状态，将产品冷却至 树脂膜，然后将周围的线相对于芯线扭转回原始状态。 在涂布步骤之前进行预热，并且在涂布步骤之后进行后加热，预热温度比后加热温度高30至130℃，具有平均值的合成树脂粉末涂料 使用40〜50μm的粒径，处理线速度为5〜10m / min。

公开(公告)号：US07585562B2

公开(公告)日：2009-09-08

申请号：US11704930

申请日：2007-02-12

Applicant: Takeshi Hasui ,  Takatsugu Fujikawa

Inventor： Takeshi Hasui ,  Takatsugu Fujikawa

IPC: D02G3/36 ,  D02G3/22 ,  E04C5/08

CPC classification number: E04C5/08 ,  D07B1/0693 ,  D07B7/145 ,  D07B7/185 ,  D07B2201/201 ,  D07B2201/2012 ,  D07B2201/2013 ,  D07B2501/2023 ,  Y10T428/2933 ,  Y10T428/2936 ,  Y10T428/2938 ,  Y10T428/294 ,  Y10T428/2947

Abstract: To improve tensile strength without impairing flexibility and adhesion to concrete, and to form a thick coating in a surface layer part for preventing a basis material from being exposed by damage to the coating, a method of forming double coatings on a prestressing strand includes a primary painting process after a pre-treatment process, in which a resin coating is formed only at the surface layer, a secondary painting process in which respectively individual state resin coating is formed on an outer peripheral face of each of the core wire and surrounding wires under a loosened and separated state, thereby forming a double coating for each surrounding wire, and a finishing process of tightening and retwisting the surrounding wires about the core wire to an original state. The obtained prestressing strand has the double coating portions only at the surface layer and sufficient flexibility and adhesion to concrete.

Abstract translation: 为了提高拉伸强度而不损害对混凝土的柔软性和粘合性，并且为了防止基材受到涂层的损害而在表面层部分形成厚的涂层，在预应力股线上形成双层涂层的方法包括： 在仅在表层形成树脂涂层的预处理工艺之后的涂漆工艺，在每个芯线和围绕的线的外周面上分别形成各自的状态树脂涂层的二次涂漆工艺 松弛和分离状态，从而形成用于每个周围的线的双重涂层，以及将围绕芯线的周围的线紧固并重新卷绕到原始状态的精加工过程。 所获得的预应力股仅在表面层具有双重涂层部分，并具有足够的柔韧性和对混凝土的粘合性。