Patent Publication Number: US-10323402-B1

Title: Beam-column connection structure

Description:
FIELD OF THE INVENTION 
     The instant disclosure relates to a beam-column connection structure, in particular to a beam-column connection structure of a prefabricated steel-concrete composite column and a steel beam. 
     BACKGROUND 
     Conventional methods of constructing reinforced concrete (RC) buildings are conducted floor-by-floor from bottom to top, which is time consuming. Such conventional method involves many processes, such as tying the reinforced steels, molding, grouting and so on, which requires a great number of workers on the construction site. Thus, the quality of construction is highly dependent on factors such as weather and the skill and experience of the workers, and is difficult to control. 
     Using steel reinforced concrete (SRC) for load-bearing beams and columns may expedite the construction process. However, extensive use of SRC will require a great amount of steel, resulting in high construction costs. 
     To resolve the above problems, a composite construction including precast RC columns and steel beams is provided. For example, precast RC columns are first fabricated in the factory, and then transported to the construction site to be hoisted and assembled with steel beams. However, such conventional beam-column connection structure provides insufficient strength and vibration resistance, and thus would benefit from improvement. 
     Given the above, it is desired to provide a beam-column connection structure with greater structural strength and to provide a construction method that can rapidly assemble a precast RC column and steel beams. 
     SUMMARY OF THE INVENTION 
     The instant disclosure relates to a beam-column connection structure having high strength for bearing weight and good resistance to vibration. 
     According to one exemplary embodiment of the instant disclosure, a beam-column connection structure is provided which comprises: a first H-shaped steel beam, a second H-shaped steel beam, a third H-shaped steel beam and a main spiral stirrup. The first H-shaped steel beam comprises a top flange, a bottom flange which is substantially parallel to the top flange and a web plate substantially perpendicularly connected to the top flange and the bottom flange. The second H-shaped steel beam comprises a top flange, a bottom flange which is substantially parallel to the top flange and a web plate substantially perpendicularly connected to the top flange and the bottom flange. The first end of the second H-shaped steel beam is substantially perpendicularly connected to a side of the first H-shaped steel beam. The third H-shaped steel beam comprises a top flange, a bottom flange which is substantially parallel to the top flange and a web plate substantially perpendicularly connected to the top flange and the bottom flange. The first end of the third H-shaped steel beam is substantially perpendicularly connected to the other side of the first H-shaped steel beam, and the third H-shaped steel beam substantially aligns with the second H-shaped steel beam. The web plate of the first H-shaped steel beam has a plurality of first through holes therein disposed along a direction perpendicular to a lengthwise direction of the first H-shaped steel beam. The web plate of the second H-shaped steel beam has a plurality of second through holes therein disposed along a direction perpendicular to a lengthwise direction of the second H-shaped steel beam. The web plate of the first H-shaped steel beam has a plurality of third through holes therein disposed along a direction perpendicular to the lengthwise direction of the first H-shaped steel beam. The third through holes are disposed opposite to the first through holes in relation to the second and third H-shaped steel beams. The web plate of the third H-shaped steel beam has a plurality of fourth through holes therein disposed along a direction perpendicular to a lengthwise direction of the third H-shaped steel beam. The main spiral stirrup is penetrated through the first, second, third and fourth through holes and is connected with the first, second and third H-shaped steel beams. 
     According to another exemplary embodiment of the instant disclosure, a beam-column connection structure is provided which comprises: a first metal plate, a second metal plate, a first end plate, a second end plate, a third end plate, a fourth end plate and a main spiral stirrup. The first metal plate is substantially cross-shaped and has a first section, a second section, a third section, a fourth section and a first hole disposed between these sections. The second metal plate is substantially cross-shaped and has a first section, a second section, a third section, a fourth section and a second hole disposed between these sections. The second metal plate is substantially parallel to the first metal plate and is spaced apart from the first metal plate. The first end plate is connected to the first section of the first metal plate and the first section of the second metal plate. The second end plate is connected to the second section of the first metal plate and the second section of the second metal plate. The third end plate is connected to the third section of the first metal plate and the third section of the second metal plate. The fourth end plate is connected to the fourth section of the first metal plate and the fourth section of the second metal plate. The main spiral stirrup is disposed within a space between the first and second metal plates. 
     For further understanding of the instant disclosure, the following embodiments are provided along with illustrations to facilitate appreciation of the instant disclosure; however, the appended drawings are merely provided for reference and illustration and are not intended to be used for limiting the scope of the instant disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The aforementioned illustrations and following detailed descriptions are exemplary for the purpose of further explaining the scope of the instant disclosure. Other objectives and advantages related to the instant disclosure will be illustrated in the subsequent descriptions and appended drawings. 
         FIG. 1  is a perspective schematic view showing a beam-column connection structure in accordance with an embodiment of the instant disclosure; 
         FIG. 2  is another perspective schematic view showing a beam-column connection structure in accordance with the embodiment of the instant disclosure; 
         FIG. 3  is another perspective schematic view showing a beam-column connection structure in accordance with the embodiment of the instant disclosure; 
         FIG. 4  is another perspective schematic view showing a beam-column connection structure in accordance with the embodiment of the instant disclosure; 
         FIGS. 5A, 5B, 5C and 5D  are schematic views showing the process of connecting the beam to the beam-column connection structure in accordance with an embodiment of the instant disclosure; 
         FIG. 6  is a perspective schematic view showing a beam-column connection structure in accordance with another embodiment of the instant disclosure; 
         FIG. 7  is another perspective schematic view showing a beam-column connection structure in accordance with said another embodiment of the instant disclosure; and 
         FIGS. 8A, 8B, 8C and 8D  are schematic views showing the process of connecting the beam to the beam-column connection structure in accordance with a further embodiment of the instant disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       FIGS. 1, 2, 3 and 4  are four perspective schematic views showing a beam-column connection structure in accordance with an embodiment of the instant disclosure. The beam-column connection  1  shown in  FIG. 2  is the beam-column connection  1  shown in  FIG. 1  rotated counterclockwise by an angle of 90°. The beam-column connection  1  shown in  FIG. 3  is the beam-column connection  1  shown in  FIG. 2  rotated counterclockwise by an angle of 90°. The beam-column connection  1  shown in  FIG. 4  is the beam-column connection  1  shown in  FIG. 3  rotated counterclockwise by an angle of 90°. The features and details of the beam-column  1  could be clearly shown by referring to  FIGS. 1, 2, 3 and 4 . 
     As shown in  FIG. 1 , the beam-column connection  1  comprises a first H-shaped steel beam  11  having a top flange  111 , a bottom flange  112  which is substantially parallel to the top flange  111  and a web plate  113  substantially perpendicularly connected to the top flange  111  and the bottom flange  112 . The first H-shaped steel beam  111  comprises a plurality first connecting holes  1131  and a plurality of second connecting holes  1132 , wherein the plurality of the first connecting holes  1131  are disposed on the web plate  113  and adjacent to a first end  117  of the first H-shaped steel beam  11  and the plurality of second connecting holes  1132  are disposed at the web plate  113  and adjacent to a second end  119  of the first H-shaped steel beam  11 , which is opposite to the first end  117  of the first H-shaped steel beam  11 . 
     Further, referring to  FIG. 1 , the beam-column connection  1  further comprises a second H-shaped steel beam  12  having a top flange  121 , a bottom flange  122  which is substantially parallel to the top flange  121  and a web plate  123  substantially perpendicularly connected to the top flange  121  and the bottom flange  122 . A first end  127  of the second H-shaped steel beam  12  is connected to a side of the first H-shaped steel beam  11  such that the second H-shaped steel beam  12  is substantially perpendicular to the first H-shaped steel beam  11 . Moreover, the second H-shaped steel beam  12  comprises a plurality of third connecting holes  1231  disposed on the web plate  123  and adjacent to a second end  129  of the second H-shaped steel beam  12 , which is opposite to the first end  127  of the second H-shaped steel beam  12 . 
     Referring to  FIG. 3 , the beam-column connection  1  further comprises a third H-shaped steel beam  13  having a top flange  131 , a bottom flange  132  which is substantially parallel to the top flange  131  and a web plate  133  substantially perpendicularly connected to the top flange  131  and the bottom flange  132 . The first end  137  of the third H-shaped steel beam  13  is connected to another side of the first H-shaped steel beam  11  such that the third H-shaped steel beam  13  is substantially perpendicular to the first H-shaped steel beam  11 . Further, the third H-shaped steel beam  13  substantially aligns with the first H-shaped steel beam  12 . Moreover, the third H-shaped steel beam  13  comprises a plurality of fourth connecting holes  1331  disposed on the web plate  133  and adjacent to a second end  139  of the third H-shaped steel beam  13 , which is opposite to the first end  137  of the third H-shaped steel beam  13 . 
     The length of the second H-shaped steel beam  12  is substantially equal to the length of the third H-shaped steel beam  13 . In particular, the distance between the first end  117  of the first H-shaped steel beam  11  and the joint  200  of the first H-shaped steel beam  11 , the second H-shaped steel beam  12  and the third shaped steel  13  is substantially equal to the distance between the second end  119  of the first H-shaped steel beam  11  and the joint  200 . Further, such distances are substantially equal to the length of the second H-shaped beam  12  or the length of the third H-shaped beam  13 . 
     In addition, a plurality of shear studs are disposed at the top flange  111  of the first H-shaped steel beam  11 , the top flange  121  of the second H-shaped steel beam  12  and the top flange  131  of the third H-shaped steel beam  13 . 
     The first H-shaped beam  11 , the second H-shaped beam  12  and the third H-shaped beam of the beam-column connection  1  further comprise a plurality of first through holes  114 , a plurality second through holes  124 , a plurality of third through holes  116  and a plurality of fourth through holes  134 . The first through holes  114  are disposed on the web plate  113  of the first H-shaped steel beam  11  and aligned along a direction which is substantially perpendicular to the lengthwise direction of the first H-shaped steel beam  11  (see  FIG. 1 ). The second through holes  124  are disposed on the web plate  123  of the second H-shaped steel beam  12  and aligned along a direction which is substantially perpendicular to the lengthwise direction of the second H-shaped steel beam  12  (see  FIG. 4 ). The third through holes  116  are disposed on the web plate  113  of the first H-shaped steel beam  11  and aligned along a direction which is substantially perpendicular to the lengthwise direction of the first H-shaped steel beam  11 , wherein the third through holes  116  are disposed opposite to the first through holes  114  in relation to the second H-shaped steel beam  12  and the third H-shaped steel beam  13  (see  FIG. 3 ). The fourth through holes  134  are disposed on the web plate  133  of the third H-shaped steel beam  13  and aligned along a direction which is substantially perpendicular to the lengthwise direction of the third H-shaped steel beam  13 . 
     The distance between the first through holes  114  and the joint  200 , the distance between the second through holes  124  and the joint  200 , the distance between the third through holes  116  and the joint  200  and the distance between the fourth through holes  134  and the joint  200  are substantially the same. 
     As shown in  FIGS. 1, 2, 3 and 4 , the main spiral stirrup  15  is penetrated through the first, second, third and fourth through holes  114 ,  124 ,  116 ,  134  and is connected with the first, second and third H-shaped steel beams  11 ,  12 ,  13 . The main spiral stirrup  15  has a uniform pitch P. Further, the distance between two adjacent first through holes  114 , the distance between two adjacent second through holes  124 , the distance between two adjacent third through holes  116  and the distance between two adjacent fourth through holes  134  are substantially equal to the pitch P of the main spiral stirrup  15 . 
     Moreover, the beam-column connection  1  further comprises a first auxiliary spiral stirrup  161 , a second auxiliary spiral stirrup  162 , a third auxiliary spiral stirrup  163  and a fourth auxiliary spiral stirrup  164 , and each of them partially intersects the main spiral stirrup  15 . The first auxiliary spiral stirrup  161  penetrates, overlaps and intersects the portion of the main spiral stirrup  15  located between the first through holes  114  and the second through holes  124  (see  FIG. 1 ). The second auxiliary spiral stirrup  162  penetrates, overlaps and intersects the portion of the main spiral stirrup  15  located between the second through holes  124  and the third through holes  116  (see  FIG. 4 ). The third auxiliary spiral stirrup  163  penetrates, overlaps and intersects the portion of the main spiral stirrup  15  located between the third through holes  116  and the fourth through holes  134  (see  FIG. 3 ). The fourth auxiliary spiral stirrup  164  penetrates, overlaps and intersects the portion of the main spiral stirrup  15  located between the fourth through holes  134  and the first through holes  114  (see  FIG. 2 ). 
       FIGS. 5A, 5B, 5C and 5D  are schematic views showing the process of connecting a beam  5  to the beam-column connection  1  after a concrete structure in a rectangular shape is formed to encapsulate the stirrups  15 ,  161 ,  162 ,  163 ,  164  of the beam-column connection  1 . After the beam-column connection  1  is formed, concrete is poured within concrete forms (not shown) surrounding the beam-column connection  1 , and then the beam-column connection  1  is embedded in the RC column  3  after removing the concrete forms. The first end  117  and the second end  119  of the first H-shaped beam  11 , the second end  129  of the second H-shaped beam  12  and the second end  139  of the third H-shaped beam protrude from the RC column  3 . As shown in  FIG. 5A , the second end  129  of the second H-shaped beam  12  and the first end  117  of the first H-shaped beam  11  protrude from the RC column  3 . As shown in  FIG. 5B , when the steel beam  5  is connected to the second end  129  of the second H-shaped steel beam  12  of the beam-column connection  1 , one end of the steel beam  5  abuts against the second end  129  of the second H-shaped steel beam  12  of the beam-column connection  1 . The steel beam  5  has a plurality of connecting holes  531  at one end of the web plate  53  and these connecting holes  531  are located to correspond to the third connecting holes  1231  of the second end  129  of the second H-shaped steel beam  12 . Further, the top flange  51  of the steel beam  5  substantially aligns with the top flange  121  of the second H-shaped steel beam  12  and the bottom flange  52  of the steel beam  5  substantially aligns with the bottom flange  122  of the second H-shaped beam  12 . As shown in  FIG. 5C , a plate  6  is attached to the web plate  123  of the second H-shaped steel beam  112  and the web plate  53  of the steel beam  5  and the holes in the plate  6  (not shown) correspond to the third connecting holes  1231  of the second H-shaped steel beam  12  and the connecting holes  531  of the steel beam  5 . Then, fixing bolts  63  are screwed into the holes of the plate  6 , the third connecting holes  1231  of the second H-shaped steel beam  112  and the connecting holes  531  of the steel beam  5  such that the plate  6  could be fixed to the web plate  123  of the second H-shaped steel beam  12  and the web plate  53  of the steel beam  5  simultaneously. That is, the second H-shaped steel beam  12  of the beam-column connection  1  and the steel beam  5  are connected to each other through the plate  6 . Moreover, as shown in  FIGS. 5C and 5D , the top flange  121  and the bottom flange  122  of the second H-shaped beam  12  further comprise the connecting holes  1211 ,  1221  and the top flange  51  and the bottom flange  52  of the steel beam  5  further comprise the connecting holes  511 ,  521 . The plate  6 ′ with holes could be further attached to the top flange  121  of the second H-shaped steel beam  12  and the top flange  51  of the steel beam  5 , and another plate with holes (not shown) could be further attached to the bottom flange  122  of the second H-shaped steel beam  12  and the bottom flange  52  of the steel beam  5 . The holes of the plate  6 ′ attached to the top flange  121  of the second H-shaped steel beam  12  and the top flange  51  of the steel beam  5  respectively correspond to the connecting holes  1211  on the top flange  121  on the second H-shaped steel beam  12  and the connecting holes  511  on the top flange  51  of the steel beam  5 , and the holes of the plate attached to the bottom flange  122  of the second H-shaped steel beam  12  and the bottom flange  52  of the steel beam  5  respectively correspond to the connecting holes  1221  on the bottom flange  122  of the second H-shaped steel beam  12  and the connecting holes  521  on the bottom flange  52  of the steel beam  5 . Then, the fixing bolts  63 ′ are screwed into the holes of the plates  6 ′ and the connecting holes  1211  on the top flange  121  on the second H-shaped steel beam  12  and the connecting holes  511  on the top flange  51  of the steel beam  5  and the connecting holes  1221  on the bottom flange  122  of the second H-shaped steel beam  12  and the connecting holes  521  on the bottom flange  52  of the steel beam  5  such that the connection of the steel beam  5  and the second H-shaped beam  12  could be enhanced. 
       FIGS. 6 and 7  are two perspective schematic views showing a beam-column connection structure in accordance with an embodiment of the instant disclosure. As shown in  FIGS. 6 and 7 , the beam-column connection structure  2  comprises a first metal plate  21 , which is substantially cross-shaped and has a first section  211 , a second section  212 , a third section  213  and a fourth section  214 . Further, the first metal plate  21  has a first hole  215  located at the center of the first metal plate  21  and between these sections  211 ,  212 ,  213  and  214 . The distance between the first section  211  and the first hole  215 , the distance between the second section  212  and the first hole  215 , the distance between the third section  213  and the first hole  215  and the distance between the fourth section  214  and the first hole  215  are substantially the same. That is, the first metal plate  21  is cross-shaped with four arms of the same length. Further, as shown  FIG. 7 , the beam-column connection structure  2  comprises a second metal plate  22  opposite to the first metal plate  21 . The second metal plate  22  is substantially cross-shaped and has a first section  221 , a second section  222 , a third section  223  and a fourth section  224 . Further, the second metal plate  22  has a second hole  225  located at the center of the second metal plate  22  and between these sections  221 ,  222 ,  223  and  224 . The distance between the first section  221  and the second hole  225 , the distance between the second section  222  and the second hole  225 , the distance between the third section  223  and the second hole  225  and the distance between the fourth section  224  and the second hole  225  are substantially the same. Thus, the second metal plate  22  is cross-shaped with four arms that are of the same length. In addition, a plurality of shear studs  218  are disposed at the upper surface of the first metal plate  21  and a plurality of shear studs  228  are disposed at the upper surface of the second metal plate  22  as well. 
     Moreover, the beam-column connection structure  2  further comprises a first end plate  231 , a second end plate  232 , a third end plate  233  and a fourth end plate  234 . These end plates  231 ,  232 ,  233 ,  234  are respectively connected to the ends of the first metal plate  21  and the ends of the second metal plate  22 . The first end plate  231  is connected to the first end  211  of the first metal plate  21  and the first end  221  of the second metal plate  22 . The second end plate  232  is connected to the second end  212  of the first metal plate  21  and the second end  222  of the second metal plate  22 . The third end plate  233  is connected to the third end  213  of the first metal plate  21  and the third end  223  of the second metal plate  22 . The fourth end plate  234  is connected to the fourth end  214  of the first metal plate  21  and the fourth end  222  of the second metal plate  22 . The first metal plate  21  and the second metal plate  22  are parallel to and spaced apart from each other. 
     Further, a main spiral stirrup  28  is disposed within a space between the first metal plate  21  and the second metal plate  22 , wherein the diameter of the main spiral stirrup  28  is substantially equal to the distance between the first end plate  231  and the third end plate  233  or the distance between the second end plate  232  and the fourth end plate  234 . In addition, a first auxiliary spiral stirrup  291 , a second auxiliary spiral stirrup  292 , a third auxiliary spiral stirrup  293  and a fourth auxiliary spiral stirrup  294  respectively and partially intersect the main spiral stirrup  28 . The first auxiliary spiral stirrup  291  is substantially located between the first sections  211 ,  221  of the first and second metal plates  21 ,  22  and the second sections  212 ,  222  of the first and second metal plates  21 ,  22  and overlaps and intersects the main spiral stirrup  28 . The second auxiliary spiral stirrup  292  is substantially located between the second sections  212 ,  222  of the first and second metal plates  21 ,  22  and the third sections  213 ,  223  of the first and second metal plates  21 ,  22  and overlaps and intersects the main spiral stirrup  28 . The third auxiliary spiral stirrup  293  is substantially located between the third sections  213 ,  223  of the first and second metal plates  21 ,  22  and the fourth sections  214 ,  224  of the first and second metal plates  21 ,  22  and overlaps and intersects the main spiral stirrup  28 . The fourth auxiliary spiral stirrup  294  is substantially located between the fourth sections  214 ,  224  of the first and second metal plates  21 ,  22  and the first sections  211 ,  221  of the first and second metal plates  21 ,  22  and overlaps and intersects the main spiral stirrup  28 . 
     Moreover, the beam-column connection structure  2  comprises a first H-shaped steel beam  24 , a second H-shaped steel beam  25 , a third H-shaped steel beam  26  and a fourth H-shaped steel beam  27 , wherein the first H-shaped steel beam  24  is connected to the first end plate  231 , the second H-shaped steel beam  25  is connected to the second end plate  232 , the third H-shaped steel beam  26  is connected to the third end plate  233  and the fourth H-shaped steel beam  27  is connected to the fourth end plate  234 , and wherein the lengths of the first, second, third and fourth H-shaped steel beams,  24 ,  25 ,  26 ,  27  are substantially the same. 
     The first H-shaped steel beam  24  comprises a top flange  241 , a bottom flange  242  which is substantially parallel to the top flange  241  and a web plate  243  substantially perpendicularly connected to the top flange  241  and the bottom flange  242 . One end of the first H-shaped steel beam  24  is connected to the first end plate  231  and the top flange  241  and the bottom flange  242  of the first H-shaped steel beam  24  are substantially parallel to the first metal plate  21  and the second metal plate  22  respectively. The first H-shaped steel beam  24  has a plurality of first connecting holes  2431  disposed on the web plate  243  and adjacent to the other end of the first H-shaped steel beam  24 . 
     The second H-shaped steel beam  25  comprises a top flange  251 , a bottom flange  252  which is substantially parallel to the top flange  251  and a web plate  253  substantially perpendicularly connected to the top flange  251  and the bottom flange  252 . One end of the second H-shaped steel beam  25  is connected to the second end plate  232  and the top flange  251  and the bottom flange  252  of the second H-shaped steel beam  25  are substantially parallel to the first metal plate  21  and the second metal plate  22  respectively. The second H-shaped steel beam  25  has a plurality of second connecting holes  2531  disposed on the web plate  253  and adjacent to the other end of the second H-shaped steel beam  25 . 
     The third H-shaped steel beam  26  comprises a top flange  261 , a bottom flange  262  which is substantially parallel to the top flange  261  and a web plate  263  substantially perpendicularly connected to the top flange  261  and the bottom flange  262 . One end of the third H-shaped steel beam  26  is connected to the third end plate  233  and the top flange  261  and the bottom flange  262  of the third H-shaped steel beam  24  are substantially parallel to the first metal plate  21  and the second metal plate  22  respectively. The third H-shaped steel beam  26  has a plurality of third connecting holes  2631  disposed on the web plate  263  and adjacent to the other end of the third H-shaped steel beam  26 . 
     The fourth H-shaped steel beam  27  comprises a top flange  271 , a bottom flange  272  which is substantially parallel to the top flange  271  and a web plate  273  substantially perpendicularly connected to the top flange  271  and the bottom flange  272 . One end of the fourth H-shaped steel beam  27  is connected to the fourth end plate  234  and the top flange  271  and the bottom flange  272  of the fourth H-shaped steel beam  27  are substantially parallel to the first metal plate  21  and the second metal plate  22  respectively. The fourth H-shaped steel beam  27  has a plurality of fourth connecting holes  2731  disposed on the web plate  273  and adjacent to the other end of the fourth H-shaped steel beam  27 . 
       FIGS. 8A, 8B, 8C and 8D  are schematic views showing the process of connecting a beam  5  to the beam-column connection structure  2  after a concrete structure in a rectangular shape is formed to encapsulate the stirrups  28 ,  291 ,  292 ,  293 ,  294  of the beam-column connection structure  2 . After the beam-column connection structure  2  is formed, concrete is poured within the concrete forms (not shown) surrounding the beam-column connection structure  2 , and then the beam-column connection structure  2  is embedded in the RC column  3  after the concrete forms are removed. The end of the first H-shaped steel beam  24  with the first connecting holes  2431 , the end of the second H-shaped steel beam  25  with the second connecting holes  2531 , the end of the third of the third H-shaped steel beam  26  with the third connecting holes  2631  and the end of the fourth H-shaped steel beam  27  with the fourth connecting holes  2731  protrude from the RC column  3 . As shown in  FIG. 8A , the end of the second H-shaped steel beam  25  with the second connecting holes  2531  and the end of the third of the third H-shaped steel beam  26  with the third connecting holes  2631  and the end of the fourth H-shaped steel beam  27  protrude from the RC column  3 . As shown in  FIG. 8B , when the steel beam  5  is connected to the second H-shaped steel beam  25  of the beam-column connection  2 , one end of the steel beam  5  is arranged to align with the corresponding end of the second H-shaped steel beam  25  of the beam-column connection structure  2 . The steel beam  5  has a plurality connecting holes  531  at one end of the web plate  53  and these connecting holes  531  are positioned to correspond to the second connecting holes  2531  of the second H-shaped steel beam  25 . Further, the top flange  51  of the steel beam  5  substantially aligns with the top flange  251  of the second H-shaped steel beam  25  and the bottom flange  52  of the steel beam  5  substantially aligns with the bottom flange  252  of the second H-shaped beam  25 . As shown in  FIG. 8C , a plate  6  is attached to the web plate  253  of the second H-shaped steel beam  25  and the web plate  53  of the steel beam  5  and the holes of the plate  6  (not shown) correspond to the second connecting holes  2531  of the second H-shaped steel beam  25  and the connecting holes  531  of the steel beam  5 . Then, the fixing bolts  63  are screwed into the holes of the plate  6 , the second connecting holes  2531  of the second H-shaped steel beam  25  and the connecting holes  531  of the steel beam  5  such that the plate  6  could be fixed to the web plate  253  of the second H-shaped steel beam  25  and the web plate  53  of the steel beam  5  simultaneously. That is, the second H-shaped steel beam  25  of the beam-column connection  2  and the steel beam  5  are connected to each other through the plate  6 . Moreover, as shown in  FIGS. 8C and 8D , the top flange  251  and the bottom flange  252  of the second H-shaped beam  25  further comprise the connecting holes  2511 ,  2521  and the top flange  51  and the bottom flange  52  of the steel beam  5  further comprise the connecting holes  511 ,  521 . A plate  6 ′ with holes could be further attached to the top flange  251  of the second H-shaped steel beam  51  and the top flange  51  of the steel beam  5 , and another plate with holes (not shown) could be further attached to the bottom flange  252  of the second H-shaped steel beam  25  and the bottom flange  52  of the steel beam  5 . The holes of the plate  6 ′ attached to the top flange  251  of the second H-shaped steel beam  25  and the top flange  51  of the steel beam  5  respectively correspond to the connecting holes  2511  on the top flange  251  on the second H-shaped steel beam  25  and the connecting holes  511  on the top flange  51  of the steel beam  5 , and the holes of the plate attached to the bottom flange  252  of the second H-shaped steel beam  25  and the bottom flange  52  of the steel beam  5  respectively correspond to the connecting holes  2521  on the bottom flange  252  of the second H-shaped steel beam  25  and the connecting holes  521  on the bottom flange  52  of the steel beam  5 . Then, the fixing bolts  63 ′ are screwed into the holes of the plates and the connecting holes  2511  on the top flange  251  on the second H-shaped steel beam  25  and the connecting holes  511  on the top flange  51  of the steel beam  5  and the connecting holes  2521  on the bottom flange  252  of the second H-shaped steel beam  25  and the connecting holes  521  on the bottom flange  52  of the steel beam  5  such that the connection of the steel beam  5  and the second H-shaped beam  25  could be enhanced. 
     The above embodiments merely describe the principle and effects of the present disclosure, instead of limiting the present disclosure. Therefore, persons skilled in the art can make modifications to and variations of the above embodiments without departing from the spirit of the present disclosure. The scope of the present disclosure should be defined by the appended claims.