An RC lattice beam is provided that can greatly dampen the transfer of vibrations in particular. As the concrete included in the RC lattice beam is polymer concrete that contains a polymer, fine-scale vibrations that may otherwise affect exposure apparatuses may be effectively dampened, while the depth of the conventional lattice beam may be kept the same. Thus, a high-damping RC lattice beam is provided that is capable of maximizing the performance of a precision exposure apparatus by reducing the defect rate and improving productivity.

An RC lattice beam is provided that can greatly dampen the transfer of vibrations in particular. As the concrete included in the RC lattice beam is polymer concrete that contains a polymer, fine-scale vibrations that may otherwise affect exposure apparatuses may be effectively dampened, while the depth of the conventional lattice beam may be kept the same. Thus, a high-damping RC lattice beam is provided that is capable of maximizing the performance of a precision exposure apparatus by reducing the defect rate and improving productivity.

A structural element for constructions comprising a structure (2) made of concrete and/or geopolymer and/or alkali activated material and at least one strip (3) made of a fibre-resin composite.

Such strip surrounds at least part of said structure (2), compressing it. The strip also at least partly surmounts an external surface (20) of said structure (2).

A structural element for constructions comprising a structure (2) made of concrete and/or geopolymer and/or alkali activated material and at least one strip (3) made of a fibre-resin composite.

Such strip surrounds at least part of said structure (2), compressing it. The strip also at least partly surmounts an external surface (20) of said structure (2).

The purpose of the present invention is to disclose a cast-in-place composite shielding shell with ultra-high performance concrete (UHPC), comprising an UHPC layer, rigid dismantling-free formworks, a RC layer, and a back anti-crack panel; the rigid dismantling-free formworks are disposed between the UHPC layer and the RC layer, and the RC layer is disposed between the UHPC layer and the back anti-crack panel; the RC layer and the UHPC layer are connected and fixed to each other by means of connectors. Compared with the prior art, the UHPC layer has higher strength and toughness, and is not prone to breakage and splashing under high-speed impact, and the back anti-crack panel prevents the presence of scabs on the back, and can better maintain the overall stress performance of the impacted site, thereby reducing damage to a main structure caused by the impact of a projectile, thus achieving the purpose of the present invention.

The purpose of the present invention is to disclose a cast-in-place composite shielding shell with ultra-high performance concrete (UHPC), comprising an UHPC layer, rigid dismantling-free formworks, a RC layer, and a back anti-crack panel; the rigid dismantling-free formworks are disposed between the UHPC layer and the RC layer, and the RC layer is disposed between the UHPC layer and the back anti-crack panel; the RC layer and the UHPC layer are connected and fixed to each other by means of connectors. Compared with the prior art, the UHPC layer has higher strength and toughness, and is not prone to breakage and splashing under high-speed impact, and the back anti-crack panel prevents the presence of scabs on the back, and can better maintain the overall stress performance of the impacted site, thereby reducing damage to a main structure caused by the impact of a projectile, thus achieving the purpose of the present invention.

A method for forming a plurality of beams connected in series is provided. The method comprises the following steps: providing a plurality of columns; providing a plurality of pre-assembled bar combinations, wherein each of the plurality of pre-assembled bar combinations comprises a plurality of lower main bars and a plurality of lower stirrups, and at least one end of the plurality of the lower main bars has connection sections extending beyond the plurality of lower stirrups; hoisting each of the bar combinations so that the two ends thereof are placed on top of two adjacent columns of the plurality of columns and the connection sections of the plurality of lower main bars of adjacent plurality of bar combinations overlap; and connecting the plurality of connection sections of the plurality of lower main bars of the adjacent plurality of bar combinations.

An assembly of concrete structural elements includes a first and a second concrete lower column, and a first and a second column capitals are supported on respective upper ends of the respective first and second lower columns. At least one inverted beam is extended between the first and second column capitals. At least one lower flat surface of the inverted beam is positioned on respective edges of the first and second column capitals.

A composite structural member for a building structure comprises a first elongate portion having a first end region and a second end region and a second elongate portion having a first end region and a second end region. The second end region of the first elongate portion is connected to the first end region of the second elongate portion so that the composite structural member provided thereby is substantially longer than either of the first and second elongate portions. The first elongate portion may comprise a first member suited for resisting high magnitude forces and the second elongate portion may be a second member, less well suited for resisting high forces but having lower cost per unit length. The composite structural member may be a rafter, especially a rafter of a portal frame.

A composite structural member for a building structure comprises a first elongate portion having a first end region and a second end region and a second elongate portion having a first end region and a second end region. The second end region of the first elongate portion is connected to the first end region of the second elongate portion so that the composite structural member provided thereby is substantially longer than either of the first and second elongate portions. The first elongate portion may comprise a first member suited for resisting high magnitude forces and the second elongate portion may be a second member, less well suited for resisting high forces but having lower cost per unit length. The composite structural member may be a rafter, especially a rafter of a portal frame.