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专利名称：Composite, prestressed structural member
and method of forming same
发明人：Stanley J. Grossman申请号：US07/662467申请日：19910228公开号：US05144710A公开日：19920908
摘要：A composite, prestressed structural member, such as a bridge unit andmethods of forming such a member. The apparatus includes a plurality of longitudinallyextending girders which are transversely spaced and a plurality of adjacent compositeunits disposed on the girders. Each composite unit has a plurality of beams with a moldeddeck portion formed thereabove. The beams are positioned transversely with respect tothe girders and attached thereto. Additional, longitudinal beams are disposed betweenthe transversely extending beams over the girders. The longitudinal beams are attachedto the girders and by connectors to the molded deck. The structure is formed bypositioning the girders on a construction support adjacent to a center portion of thegirders such that the free ends of the girders cantilever and deflect downwardly. Thebeams of the composite units are attached to the girders in this construction position.Any gaps between adjacent composite units are filled with a non-shrink, high strengthgrout. When moved to an operating position wherein opposite ends of the girders aresupported, the natural deflection of the unit due to its weight imparts a compressiveprestress longitudinally in the molded deck units. Each molded deck unit may be formedsuch that it is also transversely prestressed.
申请人：GROSSMAN; STANLEY J.
代理机构：Laney, Dougherty, Hessin & Beavers
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