JP2000355906A - Connecting section structure of corrugated steel plate and concrete floor slab in corrugated steel-plate web pc box girder bridge - Google Patents
Connecting section structure of corrugated steel plate and concrete floor slab in corrugated steel-plate web pc box girder bridgeInfo
- Publication number
- JP2000355906A JP2000355906A JP17089899A JP17089899A JP2000355906A JP 2000355906 A JP2000355906 A JP 2000355906A JP 17089899 A JP17089899 A JP 17089899A JP 17089899 A JP17089899 A JP 17089899A JP 2000355906 A JP2000355906 A JP 2000355906A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- steel plate
- corrugated steel
- concrete
- dowel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明はウェブに波形鋼板
が使用されたＰＣ箱桁橋において、波形鋼板と上部及び
下部コンクリート床版との一体性を確保した接合部構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a PC box girder bridge in which a corrugated steel plate is used for a web, in which integrity of the corrugated steel plate and upper and lower concrete slabs is ensured.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】鋼材と
コンクリートの合成構造では水平せん断力に対する両者
のずれ止めとしてスタッドジベルが一般的に用いられ、
ウェブに波形鋼板が使用されるＰＣ箱桁橋においても従
来は図８に示すようにスタッドジベルが用いられてい
る。2. Description of the Related Art In a composite structure of steel and concrete, a stud dowel is generally used as a stopper for a horizontal shear force.
In a PC box girder bridge in which a corrugated steel sheet is used for a web, a stud dowel is conventionally used as shown in FIG.
【０００３】図５〜図７に示す波形鋼板ウェブＰＣ箱桁
橋では死荷重及び活荷重の全荷重による水平せん断力に
対して波形鋼板と上部コンクリート床版及び下部コンク
リート床版が完全な合成構造を保つとの前提でＰＣ箱桁
橋全体の設計が行われるため、他の一般的な合成構造の
場合と異なり、設計水平せん断力が大きくなり、スタッ
ドジベルに作用するせん断力が大きくなる。[0003] In the corrugated steel web PC box girder bridge shown in Figs. 5 to 7, the corrugated steel plate and the upper concrete slab and the lower concrete slab have a perfect composite structure against the horizontal shear force due to the dead load and the live load. Since the design of the entire PC box girder bridge is performed on the premise of maintaining the same, unlike the case of other general composite structures, the designed horizontal shear force increases, and the shear force acting on the stud dowel increases.
【０００４】このため、コンクリートとの付着面積を増
すためにスタッドジベルの本数を多くする必要がある
が、コンクリートの回りや付着を確保する上で、スタッ
ドジベルを密に配置することができないことから、スタ
ッドジベルの径を増す、あるいはスタッドジベルが突設
されるフランジプレートの幅や肉厚を増す等、波形鋼板
を含めた構造全体の変更を余儀なくされる場合がある。
また多数のスタッドジベルを必要とすることで、コスト
高である上、施工能率が悪い。[0004] For this reason, it is necessary to increase the number of stud dowels in order to increase the adhesion area with concrete. However, in order to secure around and adhere to the concrete, the stud dowels cannot be densely arranged. In some cases, the entire structure including the corrugated steel plate must be changed, for example, by increasing the diameter of the stud dowel or by increasing the width or thickness of the flange plate on which the stud dove is protruded.
Further, since many stud dowels are required, the cost is high and the construction efficiency is low.
【０００５】この発明は上記背景より、スタッドジベル
を用いる場合の不都合を解消する波形鋼板とコンクリー
ト床版の接合部構造を提案するものである。The present invention proposes a joint structure between a corrugated steel plate and a concrete floor slab which eliminates the disadvantages of using a stud dowel.
【０００６】[0006]
【課題を解決するための手段】本発明ではプレートに長
さ方向に間隔をおいて孔が明けられた形の孔明き鋼板ジ
ベルをスタッドジベルに代えて用いることにより、多数
のスタッドジベルを用いる場合と同等以上のせん断抵抗
力を確保しながら、ＰＣ箱桁橋構成材の寸法の変更を回
避する。SUMMARY OF THE INVENTION In the present invention, when a large number of stud dowels are used, a perforated steel plate dowel having holes formed in the plate at intervals in the length direction is used in place of the stud dowels. Avoid changes in dimensions of PC box girder bridge components while ensuring shear resistance equal to or higher than that of PC box girder.
【０００７】波形鋼板の上端と下端にはその長さ方向に
フランジプレートが溶接され、各フランジプレートのコ
ンクリート床版側の面に、コンクリート床版のコンクリ
ート中に埋設される孔明き鋼板ジベルがフランジプレー
トの長さ方向に沿い、フランジプレートの面に垂直に溶
接される。孔明き鋼板ジベルはコンクリート床版のコン
クリート中に埋設される。[0007] Flange plates are welded to the upper and lower ends of the corrugated steel plate in the longitudinal direction thereof, and a perforated steel plate dowel embedded in the concrete of the concrete floor slab is flanged on the surface of each flange plate on the concrete floor slab side. It is welded along the length of the plate and perpendicular to the plane of the flange plate. Perforated steel dowels are buried in concrete on concrete slabs.
【０００８】孔明き鋼板ジベルがコンクリート中に埋設
され、孔内にコンクリートが回り込むことで、コンクリ
ートとフランジプレート間に作用する長さ方向の水平せ
ん断力に対しては孔明き鋼板ジベルの本体であるプレー
ト両面におけるコンクリートの付着力と、孔を貫通して
いるコンクリートの支圧力に加え、孔内に位置している
コンクリートがプレートの両面と同一面上の２断面で抵
抗する。[0008] A perforated steel plate dowel is embedded in concrete, and when the concrete goes around in the hole, the perforated steel plate is a main body of the perforated steel plate against a longitudinal shear force acting between the concrete and the flange plate. In addition to the adhesive force of the concrete on both sides of the plate and the bearing pressure of the concrete penetrating the hole, the concrete located in the hole resists in two cross sections on the same plane as both sides of the plate.
【０００９】スタッドジベルの場合は、スタッドジベル
の表面積分のコンクリートの付着力と、スタッドジベル
のせん断力作用方向への投影面積分のコンクリートの支
圧力、あるいはスタッドジベルの曲げせん断強度によっ
て抵抗するのに対し、孔明き鋼板ジベルの場合は更に、
プレートの孔の径に対応した断面積を持つコンクリート
のせん断耐力がせん断抵抗力に加算されるため、多数の
スタッドジベルを埋設する場合と同等以上のせん断抵抗
力を発揮することになる。In the case of a stud dowel, the resistance is caused by the adhesive force of the concrete for the surface area of the stud dove, the bearing force of the concrete for the projected area in the direction of the shear force acting on the stud dove, or the bending shear strength of the stud dove. In the case of perforated steel dowels,
Since the shear strength of concrete having a cross-sectional area corresponding to the diameter of the hole of the plate is added to the shear resistance, the shear resistance is equal to or greater than that when a large number of stud dowels are buried.
【００１０】１枚の孔明き鋼板ジベルがスタッドジベル
の場合より大きいせん断抵抗力を発揮できることで、一
定のせん断抵抗力を確保する上で、孔明き鋼板ジベル自
身の寸法を拡大する必要がないため、フランジプレート
は波形鋼板の上端や下端が接合できる程度の幅を持てば
よい。フランジプレートの寸法を拡大する必要がないこ
とで、波形鋼板の寸法に影響が及ぶこともなくなり、Ｐ
Ｃ箱桁橋構成材の寸法を変更する必要は生じない。Since one perforated steel plate dowel can exhibit a greater shear resistance than a stud dowel, it is not necessary to increase the dimensions of the perforated steel plate dowel itself in order to ensure a constant shear resistance. The flange plate may have such a width that the upper and lower ends of the corrugated steel plate can be joined. By eliminating the need to increase the dimensions of the flange plate, the dimensions of the corrugated steel plate are not affected,
There is no need to change the dimensions of the C box girder bridge components.
【００１１】また孔明き鋼板ジベルの寸法を拡大する必
要がないことで、鋼材使用量が増加することがなく、コ
ストの削減が図られる。加えてフランジプレートに対し
ては１枚の孔明き鋼板ジベルを溶接するのみであるた
め、多数のスタッドジベルをフランジプレートに溶植す
る場合より施工性の向上も図られる。Further, since it is not necessary to increase the size of the perforated steel sheet dowel, the amount of steel used does not increase and the cost can be reduced. In addition, since only one perforated steel plate dowel is welded to the flange plate, workability is improved as compared with the case where a large number of stud dowels are implanted in the flange plate.
【００１２】請求項２に記載のように孔明き鋼板ジベル
の孔を貫通して鉄筋をコンクリート床版中に配筋した場
合には、コンクリートの水平せん断力に対して鉄筋が孔
明き鋼板ジベルを拘束する効果が期待できる結果、水平
せん断耐力が向上し、靱性が確保される。In the case where the reinforcing steel is arranged in the concrete slab by penetrating through the hole of the perforated steel dowel as described in claim 2, the reinforcing steel is provided with the perforated steel dowel in response to the horizontal shear force of the concrete. As a result, the horizontal shear strength is improved and the toughness is secured.
【００１３】特開平9-221706号においても鋼板とコンク
リートとの一体性を確保する目的で鋼板に多数の孔を有
するリブを突設しているが、ここではリブを橋軸直角方
向に向けて配置していることから、リブは主に鋼板に橋
軸直角方向に生ずる曲げモーメントに対して鋼板の曲げ
剛性を確保するための要素として機能するため、本発明
の孔明き鋼板ジベルとは機能が相違する。In Japanese Patent Application Laid-Open No. 9-221706, a rib having a large number of holes is projected from a steel plate in order to ensure the integrity between the steel plate and concrete. Since the ribs mainly function as elements for securing the bending rigidity of the steel sheet against the bending moment generated in the steel sheet in the direction perpendicular to the bridge axis, the rib has the function of the perforated steel sheet dowel of the present invention. Different.
【００１４】またリブが橋軸直角方向を向くことから、
橋軸方向に作用する鋼板とコンクリート間の水平せん断
力に対してはリブの側面に生ずる支圧力で抵抗すること
になることから、せん断力によってリブが倒れる可能性
があり、橋軸方向の大きなせん断力をリブに負担させる
ことができないため、本発明の孔明き鋼板ジベルとは抵
抗機構においても相違している。Further, since the ribs are oriented in the direction perpendicular to the bridge axis,
Since the horizontal shear force between the steel plate and concrete acting in the bridge axis direction is resisted by the supporting force generated on the side of the rib, the rib may fall down due to the shear force, and the Since the shear force cannot be applied to the ribs, the present invention differs from the perforated steel plate dowel of the present invention also in the resistance mechanism.
【００１５】[0015]
【発明の実施の形態】この発明は図４〜図７に示すよう
に上部コンクリート床版１及び下部コンクリート床版２
と、両コンクリート床版１，２をつなぐウェブの波形鋼
板３から構成されるＰＣ箱桁橋において、波形鋼板３と
上部コンクリート床版１及び下部コンクリート床版２を
波形鋼板３にフランジプレート５介して接合される孔明
き鋼板ジベル６を用いて接合したものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to an upper concrete slab 1 and a lower concrete slab 2 as shown in FIGS.
And a PC box girder bridge composed of corrugated steel plates 3 of webs connecting the concrete slabs 1 and 2, the corrugated steel plates 3, the upper concrete slab 1 and the lower concrete slab 2 are connected to the corrugated steel plates 3 via the flange plate 5. It is joined using a perforated steel plate dowel 6 to be joined.
【００１６】ＰＣ箱桁橋は図５のｘ−ｘ線断面図である
図６、及びｙ−ｙ線断面図である図７に示すように死荷
重及び活荷重に対し、対になって曲げモーメントに抵抗
する上部コンクリート床版１及び下部コンクリート床版
２と、ウェブの波形鋼板３、または波形鋼板３とウェブ
コンクリート４から構成され、波形鋼板３の上端は上部
コンクリート床版１に接合され、下端は下部コンクリー
ト床版２、もしくはウェブコンクリート４に接合され
る。The PC box girder bridge is bent in pairs with respect to dead load and live load as shown in FIG. 6 which is a sectional view taken along the line xx of FIG. 5 and FIG. 7 which is a sectional view taken along the line yy of FIG. The upper concrete slab 1 and the lower concrete slab 2 which resist moment, and the corrugated steel plate 3 of the web, or the corrugated steel plate 3 and the web concrete 4, the upper end of the corrugated steel plate 3 is joined to the upper concrete slab 1, The lower end is joined to the lower concrete slab 2 or web concrete 4.
【００１７】ＰＣ箱桁橋のウェブの成は支間の中央部か
ら支点側へかけて、または支点寄りで大きくなる。図示
しないが、波形鋼板３の製作と、下部コンクリート床版
２との接合を単純化するために支間の全長に亘って一定
の成の波形鋼板３を使用する場合もあり、その場合は支
間の中央部付近のウェブが波形鋼板３のみで構成され、
支点寄りのウェブが波形鋼板３とその下のウェブコンク
リート４から構成される。The web structure of the PC box girder bridge increases from the center of the support to the support or toward the support. Although not shown, in order to simplify the manufacture of the corrugated steel plate 3 and the joining with the lower concrete floor slab 2, the corrugated steel plate 3 having a constant thickness over the entire length of the strut may be used. The web near the center is composed of only the corrugated steel sheet 3,
The web near the fulcrum is composed of the corrugated steel plate 3 and the web concrete 4 thereunder.
【００１８】ＰＣ箱桁橋の断面を示す図６のＡ部の拡大
図である図１、及び図７のＢ部の拡大図である図３に示
すようにフランジプレート５は波形鋼板３の全幅が納ま
る幅を持ち、図１のｘ−ｘ線断面図である図２及び図４
に示すように波形鋼板３の上端と下端にその長さ方向に
溶接され、上部のフランジプレート５の上面と下部のフ
ランジプレート５の下面に孔明き鋼板ジベル６が溶接さ
れる。As shown in FIG. 1 which is an enlarged view of a portion A of FIG. 6 showing a cross section of the PC box girder bridge, and FIG. 3 which is an enlarged view of a portion B of FIG. 2 and 4 which are sectional views taken along the line xx of FIG.
As shown in the figure, the upper and lower ends of the corrugated steel plate 3 are welded in the longitudinal direction, and the perforated steel plate dowel 6 is welded to the upper surface of the upper flange plate 5 and the lower surface of the lower flange plate 5.
【００１９】上部の孔明き鋼板ジベル６は上部コンクリ
ート床版１のコンクリート中に、下部の孔明き鋼板ジベ
ル６は下部コンクリート床版２のコンクリート中にそれ
ぞれ埋設される。The upper perforated steel plate dowel 6 is buried in the concrete of the upper concrete slab 1 and the lower perforated steel plate dowel 6 is buried in the concrete of the lower concrete slab 2.
【００２０】孔明き鋼板ジベル６はプレート60に長さ方
向に間隔をおいて孔61が明けられた形をし、フランジプ
レート５の長さ方向に沿い、フランジプレート５の面に
垂直に溶接される。図面では孔61を円形に形成している
が、孔61の形は円形に限られない。The perforated steel plate dowel 6 has a shape in which holes 61 are formed in the plate 60 at intervals in the length direction, and is welded along the length direction of the flange plate 5 and perpendicular to the surface of the flange plate 5. You. In the drawings, the hole 61 is formed in a circular shape, but the shape of the hole 61 is not limited to a circle.
【００２１】孔明き鋼板ジベル６の孔61内には水平せん
断力に対する接合部の靱性とせん断耐力を高めるため
に、必要により図１，図２に示すように鉄筋７が貫通し
て上部コンクリート床版１の下端に沿って配筋される。
孔明き鋼板ジベル６の本体であるプレート60には縞鋼板
が使用される場合もある。In order to increase the toughness and shear strength of the joint against horizontal shearing force, the reinforcing steel 7 penetrates into the hole 61 of the perforated steel plate dowel 6 as shown in FIGS. The reinforcement is arranged along the lower end of the plate 1.
A striped steel plate may be used for the plate 60 which is the main body of the perforated steel plate dowel 6.
【００２２】[0022]
【発明の効果】プレートに長さ方向に間隔をおいて孔が
明けられた形の孔明き鋼板ジベルをスタッドジベルに代
えて用いることで、長さ方向のせん断力に対しては孔明
き鋼板ジベルの本体であるプレートの両面におけるコン
クリートの付着力と、孔におけるコンクリートの支圧力
に加え、孔内を貫通しているコンクリートのせん断耐力
で抵抗するため、多数のスタッドジベルを用いる場合と
同等以上のせん断抵抗力を発揮させることができる。According to the present invention, a perforated steel plate bevel having a shape in which holes are formed in the plate at intervals in the length direction is used in place of the stud dowel, so that a perforated steel plate dowel can be prevented from shearing force in the longitudinal direction. In addition to the concrete's adhesive force on both sides of the plate, which is the main body of the plate, and the bearing force of the concrete in the hole, it resists with the shear strength of the concrete penetrating the hole, so it is equal to or greater than the case of using many stud dowels It can exert shear resistance.
【００２３】この結果、一定のせん断抵抗力を確保する
上で、孔明き鋼板ジベル自身の寸法を拡大する必要がな
いため、フランジプレートは波形鋼板の上端が接合でき
る程度の幅を持てばよく、ＰＣ箱桁橋構成材の寸法を変
更する必要は生じない。As a result, since it is not necessary to increase the dimensions of the perforated steel sheet gibber in order to secure a constant shear resistance, the flange plate may have a width large enough to allow the upper end of the corrugated steel sheet to be joined. There is no need to change the dimensions of the PC box girder bridge components.
【００２４】また孔明き鋼板ジベルの寸法を拡大する必
要がないことで、鋼材使用量の削減によりコストの削減
が図られる。フランジプレートに対する作業は１枚の孔
明き鋼板ジベルを溶接するのみであるため、多数のスタ
ッドジベルをフランジプレートに溶接する場合より施工
性の向上が図られる。Further, since it is not necessary to enlarge the size of the perforated steel sheet dowel, cost can be reduced by reducing the amount of steel material used. Since the work on the flange plate is performed only by welding one perforated steel plate dowel, workability is improved as compared with the case where a large number of stud dowels are welded to the flange plate.
【００２５】請求項２では孔明き鋼板ジベルの孔を貫通
して鉄筋を上部コンクリート床版の下端、及び下部コン
クリート床版の上端に沿って配筋することで、コンクリ
ートの水平せん断力に対して鉄筋が孔明き鋼板ジベルを
拘束する効果が期待できるため、水平せん断力に対する
耐力の向上と靱性の確保が図られる。According to the second aspect of the present invention, the reinforcing steel is arranged along the lower end of the upper concrete slab and the upper end of the lower concrete slab by penetrating the hole of the perforated steel dowel, thereby reducing the horizontal shear force of the concrete. Since the reinforcing bar can be expected to restrain the perforated steel plate dowel, it is possible to improve the proof stress against horizontal shear force and secure the toughness.
【図１】波形鋼板と上部コンクリート床版の接合部を示
した断面図であり、図６のＡ部の詳細図である。1 is a cross-sectional view showing a joint between a corrugated steel plate and an upper concrete floor slab, and is a detailed view of a portion A in FIG.
【図２】図１のｘ−ｘ線断面図である。FIG. 2 is a sectional view taken along line xx of FIG. 1;
【図３】波形鋼板と下部コンクリート床版の接合部を示
した断面図であり、図７のＢ部の詳細図である。FIG. 3 is a sectional view showing a joint between a corrugated steel plate and a lower concrete slab, and is a detailed view of a portion B in FIG. 7;
【図４】波形鋼板と孔明き鋼板ジベルの関係を示した斜
視図である。FIG. 4 is a perspective view showing a relationship between a corrugated steel sheet and a perforated steel sheet dowel.
【図５】ＰＣ箱桁橋を示した立面図である。FIG. 5 is an elevation view showing a PC box girder bridge.
【図６】図５のｘ−ｘ線断面図である。FIG. 6 is a sectional view taken along line xx of FIG. 5;
【図７】図５のｙ−ｙ線断面図である。FIG. 7 is a sectional view taken along line yy of FIG. 5;
【図８】スタッドジベルを用いた場合のフランジプレー
トへの配置状態を示した斜視図である。FIG. 8 is a perspective view showing an arrangement state on a flange plate when a stud dowel is used.
【符号の説明】 １……上部コンクリート床版、２……下部コンクリート
床版、３……波形鋼板、４……ウェブコンクリート、５
……フランジプレート、６……孔明き鋼板ジベル、60…
…プレート、61……孔、７……鉄筋。[Description of Signs] 1... Upper concrete floor slab, 2... Lower concrete floor slab, 3... Corrugated steel sheet, 4.
…… Flange plate, 6… Perforated steel dowel, 60…
... plate, 61 ... hole, 7 ... rebar.
Claims (2)
ート床版と、両コンクリート床版をつなぐウェブの波形
鋼板から構成されるＰＣ箱桁橋において、波形鋼板の上
端と下端にその長さ方向にフランジプレートが溶接さ
れ、各フランジプレートのコンクリート床版側の面に、
プレートに長さ方向に間隔をおいて孔が明けられた形の
孔明き鋼板ジベルがフランジプレートの長さ方向に沿
い、フランジプレートの面に垂直に溶接され、孔明き鋼
板ジベルがコンクリート床版のコンクリート中に埋設さ
れている波形鋼板ウェブＰＣ箱桁橋における波形鋼板と
コンクリート床版の接合部構造。1. A PC box girder bridge comprising an upper concrete floor slab, a lower concrete slab, and a corrugated steel plate of a web connecting the two concrete slabs, and a flange plate is provided at an upper end and a lower end of the corrugated steel plate in a length direction thereof. Is welded to the concrete floor side of each flange plate,
A perforated steel plate dowel, which is perforated in the lengthwise direction of the plate, is welded perpendicular to the flange plate surface along the length of the flange plate, and the perforated steel plate dowel is Connection structure of corrugated steel plate and concrete floor slab in corrugated steel plate web PC girder bridge embedded in concrete.
コンクリート床版中に配筋されている請求項１記載の波
形鋼板ウェブＰＣ箱桁橋における波形鋼板とコンクリー
ト床版の接合部構造。2. A rebar penetrates a hole in a perforated steel dowel,
The joint structure between a corrugated steel plate and a concrete floor slab in a corrugated steel plate web PC box girder bridge according to claim 1, wherein the reinforcing bar is arranged in the concrete floor slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17089899A JP3583313B2 (en) | 1999-06-17 | 1999-06-17 | Connection structure between corrugated steel plate and concrete slab in corrugated steel web PC box girder bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17089899A JP3583313B2 (en) | 1999-06-17 | 1999-06-17 | Connection structure between corrugated steel plate and concrete slab in corrugated steel web PC box girder bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000355906A true JP2000355906A (en) | 2000-12-26 |
| JP3583313B2 JP3583313B2 (en) | 2004-11-04 |
Family
ID=15913379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17089899A Expired - Lifetime JP3583313B2 (en) | 1999-06-17 | 1999-06-17 | Connection structure between corrugated steel plate and concrete slab in corrugated steel web PC box girder bridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3583313B2 (en) |
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|---|---|---|---|---|
| KR100501487B1 (en) * | 2002-05-28 | 2005-07-18 | 이형훈 | continuous bridge construction method using the lateral beam and preflex-girder |
| KR100889857B1 (en) | 2007-07-05 | 2009-03-24 | 박기태 | Steel beam stiffness reinforcing method |
| JP2009144411A (en) * | 2007-12-13 | 2009-07-02 | Central Nippon Expressway Co Ltd | Moving work vehicle assembling/disassembling omission method for cantilever erection method, and corrugated steel plate for use in the same |
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| JP2015178741A (en) * | 2014-03-19 | 2015-10-08 | 大成建設株式会社 | Pc box girder bridge, and method for constructing lower floor board concrete below steel flange connected to wavy steel plate |
| CN111877134A (en) * | 2020-06-19 | 2020-11-03 | 东南大学 | Perforated plate shear connector |
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