The present application discloses an anti-seismic braced scissor stairs and a frame stairs system. The stairs includes a first platform, a second platform, a third platform, a fourth platform, a fifth platform and a sixth platform. A first stair slab and a first inclined beam are provided between the first platform and the fourth platform; a second stair slab and a second inclined beam are provided between the second platform and the third platform; a third stair slab and a third inclined beam are provided between the third platform and the sixth platform; a fourth stair slab and a fourth inclined beam are provided between the fourth platform and the fifth platform. The first inclined beam and the second inclined beam are crosswise arranged to form a first cross bracing, and the third inclined beam and the fourth inclined beam are crosswise arranged to form a second cross bracing.

An impact shield for earthquake protection is described herein. The impact shield may include a canopy constructed of a puncture-resistant material, the canopy defining a first internal volume accessible via a first opening, the canopy being structured to form a semispherical shape when in an inflated state, the semispherical shape defining a space dimensioned for sheltering at least one human body; a support joined to the canopy and constructed of the puncture-resistant material, the support defining a second internal volume accessible via the first opening and a second opening, the support located within the space, the support structured to form a column when in the inflated state; and a fitting joined to the support for closing the second opening to fix the first internal volume and the second internal volume after inflation of the support and the canopy.

Structural support (1) including a first support portion (2) delimiting at least one containment compartment (4, 4′); a second support portion (6) at least partly in front of the containment compartment (4, 4′); and a sliding element (4), housed in the containment compartment (4, 4′) and interposed between the first (2) and the second (6) support portion. The sliding element (8) substantially consists of a thermo-processable fluoro-polymer with a melt-mass flow rate—according to the ISO 1133-1:2011 standard—of less than 5.0 grams/10 minutes, for example under 3.0 grams/10 minutes.

A sliding seismic isolator includes a first plate attached to a building support, and at least one elongate element extending from the first plate. The seismic isolator also includes a second plate. The first and second plates are capable of moving relative to one another along a horizontal plane. The seismic isolator also includes a lower support member attached to the second plate, with a biasing arrangement positioned within the lower support member. The elongate element(s) extend from the first plate at least partially into the lower support member, and movement of the elongate element(s) is influenced or controlled by the biasing arrangement. The seismic isolator also includes a damping structure with closed ends spaced apart from the first plate and the base of the seismic isolator. The damping structure is configured to contain a substance, such as a liquid, gas, silicone, and/or a combination thereof, and to expand longitudinally when it is compressed.

A damper includes a vibration energy buffering transfer unit and a vibration energy dissipation unit. The vibration energy buffering transfer unit includes a plurality of piston transfer structures and connecting tubes, the piston transfer structures includes a cylinder and a piston arranged as a pair, the plurality of piston transfer structures surrounding the vibration energy dissipation unit, the connecting tubes inter-connecting the plurality of cylinders, the vibration energy dissipation unit includes a damping liquid accommodating cavity and damping liquid accommodated in the damping solution accommodating cavity, and one end of the cylinder or the piston being connected to the damping fluid accommodating cavity. The load-bearing enclosing structure provided with said damper can effectively suppress vibration.

A modular construction system comprising: a first prefabricated building component including: a first plurality of support members extending parallel to each other in a first direction; and a first lateral force collector configured to transfer lateral forces; a second prefabricated building component including: a second plurality of support members extending parallel to each other in a second direction; and a second lateral force collector configured to transfer the lateral forces; and a connector extending between the first lateral force collector and the second lateral force collector configured to transfer the lateral forces therebetween.

This invention improves seismic resistance of structures by transition from stiff to non destructible flexible state at a threshold earthquake level higher than prior art maximum design earthquake level of stiff structures. Functional characteristics of the category of auto-reversing stiff-to-flexible seismic structures comprise: a limited six degree of freedom motion; a laterally-stable limited rising-twist-sway ascent; a self-centering diagonal-untwist auto-descent; a multidirectional flexibility; and a multi-phase split-force-impact seismic protection. Seismic construction technologies of the category of structures comprise: base split-force-impact technology; cluster split-force-impact technology; tuned segment split-force-impact technology; and tuned spine split-force-impact technology. The auto-reversing stiff-to-flexible seismic joints of the structures are low-cost, simple and easy to manufacture, and especially suitable for mass industrial application.

An article of manufacture for an earthquake safety protection device (ESPD) according to the present invention is disclosed. The ESPD consists of an earthquake support pole and mating support members to create survivable space around the support pole should a room be damaged in an earthquake. The ESPD may also comprise a reinforced frame within an interior door of a building. The reinforced frame resists damage from an earthquake that may prevent the interior door from opening. Opening or removal of the inner door protected by the reinforced frame creates a means of safely exiting a room in spite of damage to the interior door and its corresponding door frame. The ESPD may also include a mechanism to prevent a mobile hospital bed from moving about a room during an earthquake.

The present invention discloses a flexible connecting structure of a prefabricated component and a building main body. The flexible connecting structure comprises multiple layers of cast-in-situ building main bodies spaced up and down, a prefabricated component is connected between two adjacent cast-in-situ building main bodies, a tenon is provided at the lower end of the prefabricated component, a mortise matching the tenon is provided on the top surface of the cast-in-situ building main body, and the prefabricated component is socketed to the lower layer of cast-in-situ building main body by tenon-and-mortise cooperation; and a first flexible layer for reducing the connection rigidity between the prefabricated component and the upper layer of cast-in-situ building main body is provided at the junction between the prefabricated component and the upper layer of cast-in-situ building main body. The present invention realizes a flexible connection between a prefabricated component and a building main body, and avoids the influence of the prefabricated component on the rigidity of the building main body.

The disclosed technology provides a seismic yielding connector. The seismic yielding connector includes a U-shaped plate configured to connect a side stud of a panel to another component of a panel and a yielding plate located between the U-shaped plate and the side stud of the panel. A high-strength bolt connects the U-shaped plate, the yielding plate, and the side stud of the panel to a structural column. A bushing is located between the U-shaped plate and the structural column.