公开(公告)号：US10689870B2

公开(公告)日：2020-06-23

申请号：US16078599

申请日：2017-03-30

Applicant: SOUTHEAST UNIVERSITY

Inventor： Gang Wu ,  Xinghua Li

IPC: E04G23/02 ,  E04G21/12 ,  E04C5/12 ,  E01D22/00

Abstract: An automatic tensioning system for strengthening a beam, a slab and a column by a pre-stressed FRP plate comprises a tensioning end anchor (1), a fixed end anchor (10), and a tensioning bracket (3) connected to the tensioning end anchor (1). A centre-hole jack (16) is provided in the middle of the tensioning bracket (3), a threaded rod (8) passes through the tensioning bracket (3) and is then connected to the centre-hole jack (16), and an upper toothed nut (13) and a lower toothed nut (19) respectively driven by a driving mechanism are provided on two sides of the tensioning bracket (3) on the threaded rod (8). A binary clip-type fixture (4) is further comprised, an upper surface thereof is provided with a cylinder (6), and a sleeve (7) nested outside the cylinder (6) is connected to the threaded rod (8).

公开(公告)号：US12197831B1

公开(公告)日：2025-01-14

申请号：US18739249

申请日：2024-06-10

Applicant: Southeast University

Inventor： Decheng Feng ,  Jiayi Ding ,  Xuyang Cao ,  Shizhi Chen ,  Gang Wu

IPC: G06F30/27

Abstract: The invention discloses a ground motion intensity measure optimization method for seismic response prediction. The method includes the following steps: (1) building a building damage database; (2) optimizing ground motion intensity measures; (3) constructing a machine learning model; and (4) predicting damage states. According to the method, a combination of optimal ground motion intensity measures is selected by an elastic-net algorithm, wherein the efficiency and practicability in a current selection criterion are updated based on the goodness of fit and regression coefficient of the elastic-net model, thereby avoiding an assumption that intensity measures and structure response need to obey a logarithmic linear relationship and the limitation of intensity measure dimensions in traditional methods. By using the combination of optimal ground motion intensity measures as input variables, the prediction accuracy can be remarkably improved, and meanwhile the number of samples required is reduced.

公开(公告)号：US10378208B2

公开(公告)日：2019-08-13

申请号：US15769771

申请日：2017-03-30

Applicant: SOUTHEAST UNIVERSITY

Inventor： Zeyang Sun ,  Gang Wu

IPC: E04C3/36 ,  E01D19/02 ,  E01D22/00 ,  E04G23/02 ,  E04C3/34 ,  E04B1/30 ,  E04C5/04 ,  E04C5/06 ,  E04C5/01 ,  E04H9/02

Abstract: A steel-fiber reinforced polymer (FRP) composite material reinforced concrete column comprises an inner steel pipe arranged in the center, wherein the inner steel pipe is internally provided with an unbonded steel strand; the outside of the inner steel pipe is provided with an outer steel pipe, concrete is poured between the inner steel pipe and the outer steel pipe, a plurality of additional small steel pipes are evenly arranged outside the outer steel pipe, and each of the additional small steel pipes is internally provided with an additional unbonded steel strand. A composite bar cage coaxial with the outer steel pipe and arranged on the outside thereof is also provided, wherein both the outer steel pipe and the composite bar cage are covered by high-ductility concrete, and at a core area, the outside of the high-ductility concrete is wrapped with an anti-spalling layer.

公开(公告)号：US20240411036A1

公开(公告)日：2024-12-12

申请号：US18583948

申请日：2024-02-22

Applicant: Southeast University

Inventor： De-Cheng Feng ,  Xu-Yang Cao ,  Gang Wu

IPC: G01V1/28 ,  G06N7/01

Abstract: A calculation method for an annual average loss of an external substructure reinforcement system based on interfacial shear stresses is provided. The calculation method includes: step 1: establishing a deterministic model for an external substructure reinforcement system, and generating seismic ground motion samples and structural samples by random sampling; establishing a probabilistic hazard model based on the seismic ground motion samples; generating a probabilistic vulnerability model based on interfacial shear stresses; establishing a total probabilistic loss expectation model by different seismic ground motion intensity levels; and using the total probabilistic loss expectation model to obtain an annual average probabilistic seismic loss of the external substructure reinforcement system based on the interfacial shear stresses. The calculation method can realize classified calculations of the seismic loss of the external substructure reinforcement system. Compared with the traditional seismic loss calculation method, the calculation method is more efficient in calculation.

公开(公告)号：US20240303385A1

公开(公告)日：2024-09-12

申请号：US18588156

申请日：2024-02-27

Applicant: Southeast University

Inventor： De-Cheng Feng ,  Xu-Yang Cao ,  Gang Wu

IPC: G06F30/13 ,  G06F30/20 ,  G06F119/14

CPC classification number: G06F30/13 ,  G06F30/20 ,  G06F2119/14

Abstract: An integral reinforcement design method of an external frame-brace based on a random capability spectrum is provided, and the reinforcement design method includes: evaluating an original structure before reinforcement by using a random capability spectrum method; performing a reinforcement analysis on an external frame-brace sub structure by using the random capability spectrum method to obtain a reinforced structure; and performing a reinforcement verification on the reinforced structure by using the random capability spectrum method. A performance based integral reinforcement design of the external frame-brace sub structure is achieved through considering uncertain factors, as well as capability spectrums and demand spectrums before and after the reinforcement, and converting the integral structure to equivalent single degree of freedom to obtain performance points.