Composite building structure and walls therefor

Claim 2

A steel reinforced concrete wall having a discontinuous distribution of rigidity, comprising a concrete wall body; steel reinforcing members distributed in the concrete wall body to reinforce the body; a plurality of elongated strap-like bar members, each having at least one elongated surface whose width taken in the direction of the thickness of the concrete wall body being substantially identical with the thickness of the concrete wall body, said plurality of the bar members being embedded in said concrete wall body in parallel with each other; a plurality of pairs of mutually slidable abutting surfaces distributed in said concrete wall member in parallel with each other, at least one of each pair of abutting surfaces being formed by the elongated surface of said bar member; and a plurality of subsections of the concrete wall member being defined by severing said concrete wall body and said reinforcing members at said pairs of mutually slidable abutting surfaces, in such a manner that the concrete wall member has a rigidity which is discontinuous at said abutting surfaces and yet the concrete wall member being a rigid integral wall as a whole unless a shearing load in excess of a certain yielding stress is applied thereto; the longitudinal length of said abutting surfaces and the distribution of said steel reinforcing members being so related that said abutting surfaces act to prevent each subsection fRom swelling when a stress greater than said yielding stress but smaller than a breakdown stress thereof is applied thereto.

Claim 3

A steel reinforced concrete wall according to claim 1, wherein said reinforcing concrete members in each subsection being so distributed that each subsection has a shearing breakdown stress (Kg/cm2) which is greater than a bending yielding stress (Kg/cm2) of the same subsection.

Claim 4

A steel reinforced concrete wall according to claim 2, wherein each of said subsection has a ductility factor not smaller than three, said ductility factor being a (strain at breakdown)/(strain at yield) ratio.

Claim 5

A composite building structure having a skeleton with a breakdown strain sigma 1(radians) and a plurality of steel reinforced concrete walls joined to said skeleton, each of said steel reinforced concrete walls, comprising a concrete wall body; steel reinforcing members distributed in the concrete wall body to reinforce the body; a plurality of elongated strap-like bar members, each having at least one elongated surface whose width taken in the direction of the thickness of the concrete wall body being substantially identical with the thickness of the concrete wall body, said plurality of the bar members being embedded in said concrete wall body in parallel with each other; a plurality of pairs of mutually slidable abutting surfaces distributed in said concrete wall member in parallel with each other, at least one of each pair of abutting surfaces being formed by the elongated surface of said bar member; and a plurality of subsections of the concrete wall member being defined by severing said concrete wall body and said reinforcing members at said pairs of mutually slidable abutting surfaces, in such a manner that the concrete wall member has a rigidity which is discontinuous at said abutting surfaces and yet the concrete wall member being a rigid integral wall as a whole unless a shearing load in excess of a certain yielding stress is applied thereto; the longitudinal length of said abutting surfaces and the distribution of said steel reinforcing members being so related that said abutting surfaces act to prevent each subsection from swelling when a stress greater than said yielding stress but smaller than a breakdown stress thereof is applied thereto, said reinforcing concrete members in each subsection being so distributed that each subsection has a shearing breakdown stress (Kg/cm2), which is greater than a bending yielding stress (Kg/cm2) of the same subsection, and a ductility factor not smaller than three, said ductility factor being a (strain sigma 2(radian) at breakdown)/(strain sigma 2(radian) at yield) ratio, whereby said composite building structure has a breakdown strain sigma 3(radian) which is identical with the sum of said skeleton breakdown strain sigma 1(radian) and said wall subsection breakdown strain sigma 2(raidan) ( sigma 3 sigma 1+ sigma 2).

Claim 6

A composite building structure having a skeleton with a breakdown strain sigma 1(radians) and a plurality of steel reinforced concrete walls joined to said skeleton, each of said steel reinforced concrete walls, comprising a concrete wall body; steel reinforcing members distributed in the concrete wall body to reinforce the body; a plurality of elongated strap-like bar members, each having at least one elongated surface whose width taken in the direction of the thickness of the concrete wall body being substantially identical with the thickness of the concrete wall body, said plurality of the bar members being embedded in said concrete wall body in parallel with each other; a plurality of pairs of mutually slidable abutting surfaces distributed in said concrete wall member in parallel with each other, at least one of each pair of abutting surfaces being formed by the elongated surface of said bar member; and a plurality of subsections of the concrete wall member being defined by severing said concrete wall body and said reinforcing members at said pairs of mutually slidable abutting surfaces, in such a manner that the concrete wall member has a rigidity which is discontinuous at said abutting surfaces and yet the concrete wall member being a rigid integral wall as a whole unless a shearing load in excess of a certain yielding stress is applied thereto; the longitudinal length of said abutting surfaces and the distribution of said steel reinforcing members being so related that said abutting surfaces act to prevent each subsection from swelling when a stress greater than said yielding stress but smaller than a breakdown stress thereof is applied thereto, said reinforcing concrete members in each subsection being so distributed that each subsection has a shearing breakdown stress (Kg/cm2), which is greater than a bending yielding stress (Kg/cm2) of the same subsection, and a ductility factor not smaller than three, said ductility factor being a (strain sigma 2(radian) at breakdown)/(strain sigma 2(radian) at yield) ratio, whereby said composite building structure has a breakdown strain sigma 3(radian) which is identical with the sum of said skeleton breakdown strain sigma 1(radian) and said wall subsection breakdown strain sigma 2(raidan) ( sigma 3 sigma 1+ sigma 2).

Claim 7

A steel reinforced concrete wall according to claim 1, wherein each of said bar members is made of a material selected from the group consisting of asbestos slates, plaster boards, synthetic resin, iron, and non-ferrous metals.

Claim 8

A steel reinforced concrete wall according to claim 5, wherein each of said bar members consists of a single bar made of a material selected from said group.

Claim 9

A steel reinforced concrete wall according to claim 5, wherein each of said bar members consists of two bars made of a material selected from said group.

Claim 10

A steel reinforced concrete wall according to claim 1, wherein said concrete wall body is of rectangular shape including one side length of (l + 2l0), and the length of each of said strap-like bar members is l, and the bar members are disposed in said concrete wall member with a uniform spacings of D between each other in parallel with said wall member side of length (l + l0) while leaving a spacing l0 from other sides of the wall member to facing ends of the bar member, the dimensions D, l, and l0 satisfying conditions of l0/D > or = 0.5 and l/D > or = 1.0.

Claim 11

A composite wall structure according to claim 4, wherein natural period T (second) of the skeleton is related to the height H (meter) of the skeleton as follows: T > or = 0.025H.

Claim 12

A composite building structure according to claim 4, wherein said skeleton is a steel skeleton.

Claim 13

A steel reinforced concrete wall according to claim 1, wherein said subsections are precast steel reinforced concrete wall sections, and said strap-like bar members are disposed at joints between the adjacent precast wall sections.

Claim 14

A composite wall structure according to claim 4, wherein said steel reinforced concrete wall members are disposed in at least two vertical rows in parallel with vertical columns of said skeleton.

Claim 15

A steel reinforced concrete wall according to claim 1, wherein said strap-like bar member is coated with a friction-reducing film.

Claim 16

A steel reinforced concrete wall according to claim 8, wherein each said strap-like bar members is divided in two parts which are spaced from each other in the longitudinal direction thereof.

Claim 17

A steel reinforced concrete wall according to claim 1, wherein said strap-like bar members extend from one edge of the wall body toward the opposite edge to said one edge and terminate at an intermediate position before reaching the opposite edge.

Claim 18

A steel reinforced concrete wall according to claim 1, wherein said strap-like bar members extend from each of the two opposing edges of the wall body by a length shorter than one half of the distance between the two opposing edges.