University of Hannover - Institute for Steel Construction Univ.-Prof. Dr.-Ing. Peter Schaumann Appelstraße 9A 30167 Hannover +49 0511 762-3781 FAX +49 0511 762-2991 schaumann@stahl.uni-hannover.de www.stahlbau.uni-hannover.de

1 INTRODUCTION

The software package H-Fire deals with the calculation of design resistances for composite members exposed to fire by using the simple calculation models of the EN 1994-1-2. The pack-age includes different Excel-sheets for each of the simple calculation models for the members. Additionally it includes a profile database and a sheet for calculation of the steel temperature-time curves. The following programs belong to the software package:

- profilenew.mdb (Profile data base) - [H-Fire-Temp1-04-1.xls (Calculation of the steel temperature-time curves; available only

in German)] - H-Fire-Slab1-04-1.xls (Calculation of the design resistance of composite slabs in fire

situation) - H-Fire-Beam1-04-1.xls (Calculation of the design resistance of composite beams com-

prising steel beams with partial concrete encasement in fire situation) - H-Fire-Beam2-04-1.xls (Calculation of the design resistance of composite beams without

concrete encasement of the steel beam in fire situation) - H-Fire-Column1-04-1.xls (Calculation of the design resistance of composite column with

partially encased steel sections in fire situation) All programs except H-Fire-Temp1-04-1.xls can be delivered in English and German. For get-ting a version please contact the Institute for Steel Construction, University of Hannover: stahlbau@stahl.uni-hannover.de .

2 REQUIREMENTS AND SETTINGS

The requirements of running H-Fire are: - Pentium PC - Microsoft Windows - Microsoft Office

The macro safety in Excel has to be reduced to middle, so the macros of the programs can be ac-tivated. After finishing work with the sheets the macro safety should be set back to high.

Short description of the Software package “H-Fire”, version 04.1

P. Schaumann, T. Trautmann

If problems during the usage of the programs encounter, following settings in Excel should be checked. Switch to the Visual Basic Modus by using the shortcut [Alt]+[F11]. Following the link Extras Reference, the window References – VBA Project opens. The following Refer-ences should be activated:

- Visual Basic for Applications - Microsoft Excel 10.0 Object Library - OLE Automation - Microsoft Forms 2.0 Object Library - Microsoft Scripting Routine - Microsoft Office 10.0 Object Library

3 PROGRAMS

3.1 Profile data base The profilenew.mdb is a data base of different profiles. It is needed for the Excel-sheets H-Fire-Slab1-04-1.xls, H-Fire-Beam1-04-1.xls, H-Fire-Beam2-04-1.xls and H-Fire-Column1-04-1.xls and has to be in the same folder. The structure of the data base can be seen in Figure 1.

Figure 1. Structure and content of the profile data base

It is possible to add a new profile, if it is not included in the data base. Additionally, values of existing profiles can be shown and/or changed.

3.2 Calculation of the steel temperature-time curves The Excel-sheet H-Fire-Temp1-04-1.xls calculates the temperature of a steel cross-section dur-ing fire exposure. 16 different types of cross-sections can be chosen which are covering most of the practical cases. Two of them are universal cross-sections (with and without fire protection) in which the cross-sectional factor A/V can be typed manually. The program can calculate up to 240 minutes of fire exposure. The user can choose between the nominal temperature-time curves (standard temperature-time curve, external fire curve or hy-drocarbon curve) and a user defined temperature-time curve, e.g. natural fires. To input a gas temperature-time curve, a data file with points of the curve has to be created. The output includes a short summary of the input data and the temperature of the steel in a time interval of 5 minutes up to the chosen fire resistance. It is possible to save and/or to print the re-sults of the calculation. Additionally a more detailed result can be shown.

Figure 2. Choice of the cross-section of the steel member

3.3 Calculation of the design resistances of composite slabs in fire situation

Figure 3. Cross-sections of composite slabs

The Excel-sheet H-Fire-Slab1-04-1.xls calculates the design bending resistance of a composite slab exposed to fire. It is possible to calculate the sagging moment as well as the hogging mo-ment. The steel sheet has to be in the profile data base profilenew.mdb, or it has to be added to it. The strength class of the concrete can either be chosen of a list of standard strength classes or can be specified by typing the concrete compression strength. This applies to the reinforcement bars too. Before showing the results, the program checks, if the insulation criteria “I” is fulfilled. If not, the program shows an error message and the user has to adjust his input data. The output includes the target standard fire resistance, the design bending resistance in fire situation and a summary of the input data. It is possible to save and/or to print the results of the calculation.

Figure 4. Input of the geometrical data of the composite slab

3.4 Calculation of the design resistance of composite beams comprising steel beams with partial concrete encasement in fire situation

Figure 5. Cross-section of a composite beam comprising a steel beam with partial concrete encasement

The Excel-sheet H-Fire-Beam1-04-1.xls calculates the design bending resistance of composite beams comprising steel beams with partial concrete encasement exposed to fire. It can be cho-sen if the steel beam is a welded or rolled profile. A rolled profile has to be included in the data base profilenew.mdb, or it has to be added to it. After typing the geometrical data, the scope of application will be checked. If one of the input data does not comply with these scopes, the program reports an error message. The wrong pa-rameter has to be adjusted, before the program continues. The output includes the target standard fire resistance, the design bending resistance in fire situation and a summary of the input data. It is possible to save and/or to print the results of the calculation.

Figure 6. Input of the geometrical data of the composite beams comprising steel beams with partial con-

crete encasement

3.5 Calculation of the design resistance of composite beams without partial concrete encasement of the steel beam in fire situation

Figure 7. Cross-section of a composite beam without partial concrete encasement of the beam

The Excel-sheet H-Fire-Beam2-04-1.xls calculates the design bending resistance of composite beams comprising steel beams without partial concrete encasement exposed to fire. It can be chosen if the steel beam is a welded or rolled profile. A rolled profile has to be included in the data base profilenew.mdb, or it has to be added to it. Additionally it has to be defined if the slab is a concrete or a composite slab. After typing the geometrical data, the temperatures of the steel beam and the standard fire resis-tance are needed. Additionally the design shear resistances and the number of the shear connec-tors have to be specified. The output window of the sagging and hogging moment is different. At the calculation of the design sagging moment, only the design sagging moment is shown. At the output window of the design hogging moment, the design hogging moment and the design sagging moment of the ad-jacent span is shown (not usable for end spans!). The required number of shear connectors is shown in both windows.

Figure 8. Input of the geometrical data of the composite beam without partial concrete encasement of the

beam

3.6 Calculation of the design resistance of composite column with partially encased steel sections in fire situation

Figure 9. Cross-section of a composite column with a partially encased steel section

The Excel-sheet H-Fire-Column1-04-1.xls calculates the axial design compression resistance of columns with partially encased steel sections exposed to fire. It can be chosen, if the steel beam is a welded or rolled profile. A rolled profile has to be included in the data base profilenew.mdb, or it has to be added to it. After typing the geometrical data, the scope of application will be checked. If one of the input data does not comply with these scopes, the program reports an error message. The wrong pa-rameter has to be adjusted, before the program continues. The output includes the target standard fire resistance, the axial design compression resistance in fire situation and a summary of the input data. It is possible to save and/or to print the results of the calculation.

Figure 10. Input of the reinforcement and concrete for the composite column

ANNEX A: STRUCTURE OF THE SHEET H-FIRE-TEMP1-04-1.XLS

Figure 11. Structure of the sheet for calculation of the steel temperatures

ANNEX B: STRUCTURE OF THE SHEET H-FIRE-SLAB1-04-1.XLS

Figure 12. Structure of the sheet for calculation of the bending resistance of composite slabs

ANNEX C: STRUCTURE OF THE SHEET H-FIRE-BEAM1-04-1.XLS

Figure 13. Structure of the sheet for calculation of the bending resistance of composite beams comprising

steel beams with partial concrete encasement

ANNEX D: STRUCTURE OF THE SHEET H-FIRE-BEAM2-04-1.XLS

Figure 14. Structure of the sheet for calculation of the bending resistance of composite beams without par-

tial concrete encasement of the steel beam

ANNEX E: STRUCTURE OF THE SHEET H-FIRE-COLUMN1-04-1.XLS

Figure 15. Structure of the sheet for calculation of the axial compression resistance of composite columns

with partially encased steel sections